Now all I do is, just paint a 1/4 thickness of plaster.. lay in a cloth strip and done. Not the best photo.. but study this sheet.. Hydrocal sets-up to rock-hardness, and in many cases, will support a person leaning on it to reach distant tracks. Cut the plaster â¦ Hydrocal: n the brand name for a gypsum product, a-hemihydrate, known as artificial stone. The downside of Hydrocal is that it does not carve or take stains/washes very well. It is enough that Jesus died and that he died for me. I already had a two pound carton of Woodland Scenics Hydrocal â¦ a 10 pound box of this hydrocal was I think 10 bucks..so 1 dollar a pound. I prime neither when painting. Page 1 of 2 - hydrocal vs. plaster? Just my 2 cents worth, I spent the rest on trains. But all three DEFINITELY have their uses. Beats the heck out of Walmart prices/unit weight/volume. Hydrocal doesn't take paint easily. Bob Hahn. I picked up my Dental Plaster off of ebay. I dont' think that is my approach. If you think you have it right, your standards are too low. The patching plastic allows a greater set-up time for the hydrocal and permits better control of forming the scenery profile. Even though your plaster mix has been mixed correctly with no bubbles.. you can and will still get an impartial filling of the cracks and detail. I can only tell you what I know.. and what I do. Hydrocal comes in several versions(Hydrocal/Ultracal/etc...). Another friend loves lightweight hydrocal. To me plaster of paris is easier to work with and cheaper. Well mix your plaster exactly like this. Cooking. Hydrocal is what I use. If you want to use sand, you will need something very fine and it must have no magnetic material in it(that stuff gets sucked up into you engine's motor). The finished product.. is an extremely thin .. light.. very strong casting. bulk sand? Thanks for your reply. USG White Hydrocalâ¦ I am considering crafting my own formicarium. If you choked a Smurf what color would he turn? It's a slower method and takes longer to set up, but I like the results. A true friend will not bail you out of jail...he will be sitting next to you saying "that was friggin awesome dude!" So many choices but so little time. However I've heard comments that it is to heavy. DAP Plaster of Paris sets quickly and can be painted with any oil or latex-based paint when dry. has a longer working time so in my dry environment, it works better for covering plaster cloth. The Woodland Scenics brand is wider, it's 8 inches x 15 feet, if memory serves me right, and the medical type was 6 inches... but still it's a whole lot cheaper. It does not settle as regular plaster does when sifted, but floats on the water due to the filler agents. USG No. DAP Plaster of Paris may be used to fill holes in interior plaster walls and ceilings. An ideal plaster mix is one in which the plaster particles are completely dispersed â¦ OK for one time use (or maybe 3X if you are careful) Hydocal and Ultracal are gypsum cements and dry much harder and have higher strength, with Ultacal being harder than the Hydrocal. Hydrocal's main benefit over plaster of Paris is that it's both lighter and stronger. Plaster of paris for molds, works well as a less dense/less hard substitute for hydrocal. Then I knew.. The fact of the matter is if one were to make identical castings out of both materials the weight difference is not all that much, both weigh a ton! MR subscribers, check out the new All-Time Digital Archives, http://s12.photobucket.com/albums/a235/ARTHILL/, From: Orig: Tyler Texas. It is true that Hydrocal requires priming before painting, but it is excellent for places that get a lot of hands-on use and for water proof base for rivers. Smack it on the table. and the numbers and prices.. $15.. $18 and $25. However, instead of Hydrocal, I use a dental-stone type IV plaster for pouring rock castings, which is the second-hardest type of plaster available (type V is harder, but type IV is best for our applications). P.S.- ...although I do like the idea of anything that will add strength to my hardshell. It would do so after priming. It takes an iron man to play with a toy iron horse. can I get this stuff in bulk? Now I don't claim to be an expect.. but only one that wishes to share what I know and what I've done... perhaps it might spark other ideas that lead to better ideas. Plaster of Paris vs. Hydrocal White â¢ Plaster of Paris is a cheap plaster. I pour less.. and use a clothstrip on the back for added strength. I usually 'paint' the basic Hydrocal 'hard shell' with Plaster of Paris, then use my â¦ It is soft, even when cured and is not very strong. FREE Shipping on orders over $25 shipped by Amazon. I stopped using much plaster cloth after I discovered foam scenery. Peter. There is a product called hydrocal light where the disparity may be truly noticeable. I would not use dirt(too much organic stuff in it). Being old is when you didn't loose it, it's that you just can't remember where you put it. a rock and gravel company maybe? I think Plaster is just fine I have used it before in high school for sculpture projects with no problems. If you pick the wrong type of bowl.. you'll have problems cleaning it. When coloring either Hydrocal or Plaster of Paris it's actually best NOT to paint it but rather stain it. So, the jury is still out on the subject for me. Ballast - Most of the Woodland Scenics ballast appears to be crushed walnut shells(or something close). It might be Scenic Express. It is usually sold in 100# bags. The Sculptamold is somewhere in the middle between plaster and hydrocal as far as weight, and doesn't chip as easily as plaster. Pick a smooth bowl. Some LHS's carry these lines, others you have to mail order from. So, I stuck with using Plaster of Paris. Login or register to post comments; Drywall mud is not Plaster. I have poured large faces of rocks.. using less and less dental plaster. Thats it.. btw.. Plaster of Paris is just that, a plaster. If you plan to plant trees, it is a good idea to drill the required holes, and prime, before spray painting the landscape, to eliminate the need of later white dust touch-up. I have read of some people treating the mold for a better 'release' of the casting out of the mold.. but I really frown on it. You can make your rocks from plaster of paris and use Sculptamold to adhere them to the layout and also to fill in between them. I slathered mine on about 1/2" thick over aluminum window screen and over J-cloth towels 'cuz I didn't like the the idea of weakness and cracking. Then I apply small cloth strips over the 'high' area's of the mold. Seal it first. FREE Shipping . Plaster of Paris is 'softer', and can be carved. I have tried both. USG Hydrocal® Brand White Gypsum Cement is a good multi-purpose product for people looking to upgrade from a standard plaster product to one that has a higher degree of hardness and impact resistance. Something I learned real quick about painting plaster of paris. It costs me about Cdn$19/bag, and I am on my third already doing hardshell. Hydrocal is my preference for molded outcrops, since it is tough. I also use Gypsolite (LHS, same big jar) which has a nice gritty texture. manage your account online and more! What is the difference with Plaste of paris? Light and strong. Vendor. Besides.. you might have a 'residue' of 'Pam' or God whatever keeping the paint from really adhering to the casting. I buy somebody else's Hydrocal in a big jar. So far, it is strong. Pojman. Cycling. Hydrocal â¦ it seems to be just some very fine sand. Casting Hydrocal White into a plaster mold using fiberglass mat The other two are lime plaster, made from calcium hydroxide and sand, and cement plaster, a combination of plaster, sand, Portland cement and water. Extreme heat is used to leach the water from the gypsum and create a fine powder that, when mixed with water, produces a cement-like material. Both work well. Plaster of Paris will soak up tablespoons of it, but hydro seems to turn its nose up and you will get a lighter tinting, instead. I'd stick with the Hydrocal if I were you. Has a fine grain â making it ideal for producing sharp detail when used neat for cast work. Plaster of Paris is the most commonly used plaster and is also called gypsum plaster. I have already commited about $2500 on wood for this train set, 2 loomotives, some cars, construction insulating foam, paints, paint brushes track, power supplies heheh...why am I telling you all this, you all know how it works... well my wad of cash is gone so im now ready to do things the cheapest way. Plaster of Paris (USG No. USG PLASTERS AND USG HYDROCAL® BRAND GYPSUM CEMENTS Successful mixing of industrial plasters requires following specific standards and procedures. Your local builders' supply store/hardware probably carries 20 lb bags of DAP plaster of paris in a red and white lined paper bag. Yeah, Jeffrey, that makes sense. my photos. Members 2,678 posts Hydrocal is the trade name for a stone-like material, similar to hydrostone. I've also used Bragdon Foam with a Bragdon mold. With that overview, let's look at the basics. I have used both and I color my rock castings with diluted acrylics. 138. When hardened, it will permit removal of molds with "undercuts" whereas plaster of paris will break off detail. I wanted to know what is the difference? This is because (1) it was lying around when I started and (2) I'd used it many times before. BUT.... (there's that but again), make sure it's the slower setting type. It's the same stuff that is used to make casts for broken bones etc.and it works just fine. http://s299.photobucket.com/albums/mm310/TWhite-014/Rio%20Grande%20Yuba%20River%20Sub One can NEVER have too many Articulateds! I guess.. when you stir the spoon.. as it is in the pic.. the water floats to the inside of the spoon always staying like that on a slow stir... while the rest of the plaster is being mixed under the spoon. hahha, http://www.chuckcondron.com/CCLayout/index.html, Dr. Frankendiesel aka Scott Running BearSpace Mouse for president!15 year veteran fire fighterCollector of Apple //e'sRunning Bear EnterprisesHistory Channel Club life member.beatus homo qui invenit sapientiam. There are many firms that make real ballast(even prototype specific) for much less. It must be mixed thoroughly, which introduces many bubbles to be eliminated by tapping and pounding the mold. I have some really nice molds which give great results with Hydrocal. I have a couple â¦ Hydrocal vs Light weight Hydrocal vs Plaster of Paris and Ballast. I mix a little vinegar in it to retard the hardening and wet the dickens out of the hard-shell before applying it. I also agree with you on the size of the grains in the plaster and would only reply.. "You think a Dentists wants a grainy 'impression' of someone's teeth"? They soak up moisture, float, and even grow mold in some enviroments. Many good LHS's will buy the bulk bags and re-package it themselves into smaller bags. I use PofP now only for rock castings. USG Hydrocal â¦ 2. Its easy-to-mix formula dries to a dense, durable finish that resists paint absorption. like a sponge. 99 ($0.20/Ounce) Get it as soon as Tue, Jan 12. thank you!! Strictly my O/P as some doe paint hydrocal to seal it first. I know this.. I am needing to do some landscaping. Good luck. â¦ I use shellac for this purpose. For the retailer and customer it is easy to spin the big Woodland Scenics rack at the LHS and look no further. Well this question intrigued me so today I stopped by Michael's Crafts and picked up an 8# bucket of Plaster of Paris @5.29. 4.5 out of 5 stars 701. Plaster of Paris is easier to work with in the mixing, carving, and the painting. Share with: Link: Copy link. Sorry for the poor picture quality but the reddish color of Pa. Stone is not really well represented by my poor photography. Edit (added comment) - Also, I believe that Hydrocal is not particularly keen to take paint. USG also sells Hydrocal in 50-pound bags which should cost â¦ Thu, 2013-07-11 18:00 â Stoker . âSuperXâ hydrostone is mixed 22 parts water to 100 parts powder. Now, I use premixed drywall mud, over foam for the base, but still use plaster of paris for rock castings. I don't know why.. I seal the bottom of the pipe with dry plaster of Paris â¦ Its stronger. Get all the moisture you can see off the mold. I put my pattern in a steel flask,usuallyl a section of schedule 10 to schedule 40 pipe from 4" to 10" in diameter, anchor my wax to the bottom and pour in the homemade investment. You see the way the spoon is? But it is awfully good for rock castings. Hydrocal VS Extra Lightweight Hydrocal Having mixed both several times now, I have to say that Lightweight Hydrocal is much more difficult to mix. Then I use a paint brush.. and paint the plaster into the fine cracks and detail of the mold. When the dry plaster powder is mixed with water, it rehydrates over time into gypsum. Puritan Pottery Plaster with 2400psi Compression Strength . Hydrocal White â¢ is a statuary plaster â¦ The pictures below are of a Hydrocal High Arched PRR prototype stone viaduct that I've been working on the past week or so. Login, or register today to interact in our online community, comment on articles, receive our newsletter, Is that about right? wow, always a lot of info on this forum! Pojman. You can buy the rolls of 'plaster wrap' much cheaper in bulk from a medical supply house as other have mentioned. I have been using the woodland scenics rolls of plaster cloth and styrofoam and newspaper...its going well...9 bucks for a roll...can I do it cheaper? 138. manage your account online and more! it seems I go to the hobby shop...buy a crap load of stuff...and in about 2 hours im out of supplies! "CLANK" was the sound, a high pitch clank. Allowing the first coat to dry overnight, two more coats one hour apart are enough to make a firm scenery base. Reading Company Technical & Historical Society http://www.readingrailroad.org/. Real rock ballast is much better. There is aTuf-stone which is much harder â¦ If mixed with with fine sand (even play ground sand) at one unit by weight of plaster to 0.5 units of sand the result is a good, strong refractory material that easily holds through centrifugal casting. Ah to make this very short. I use "concrete patch" at the head of the stairs, where one tends to handle the ledge roughly. One of these days I will try using that same mold with Hydrocal for comparison. Each designates a specific composition of ingredients that yield â¦ I have bought the real and the woodland...I mixed them and liked the effect. Densite is the name. Ultracal, Plaster of Paris and the dozens of other plasters and gypsum cements all have their advantages and disadvantages. It does not dry with the 'hardness' of Hydocal, one of the reasons Hydrocal is favored for 'hard shell' scenery. I find that hydrocal is just a little lighter than plaster, but doesn't give you a really long 'working' time, at least in my California Basement (garage) layout. The setting of plaster slurry â¦ Regular hydrocal should be mixed at a ratio of 32 parts water to 100 parts powder by weight. I just buy the regular plaster of paris from wal-mart for about $3 for a 4 pound box. Made most of my castings from plaster of paris. To obtain the full benefit of improved products, shop procedures must be standardized. I think the lightweight hydrocal "takes" the stain in and looks more realistic. is this normal? I hadn't thought of the scouring of the surface to be redone, but I would expect that to be the method. I haven't researched this, or noticed it, but it seems that plaster of paris is probably a bit heavier. you get far greater detail then you would by painting. Micro Mark has a very attractively priced Hydrocal offering (compared with WS). 'Surface Tension' yes.. that is what is keeping the plaster really getting into and adhering to the mold. Here is the formula, 1/3 plaster of Paris, 1/3 Hydrocal and 1/3 silica sand, all of these by volume. This helps slow down the absorption process. But in short... using the hyrdrocal/dental plaster. End result is less air bubbles. Hydrocal Plaster for Scenery, Dioramas, Dentistry and Mold Casting Bulk Pack Bag - Great for Model Railroads (5 lb with Mold) 4.4 out of 5 stars 7. I tried some WS lite weight hydrocal, but it was no better than PofP and cost WAY more. I am happy with the detail.. and this is the best shot I can show you. I skim-coat my construction-foam base and hills with this, and it gets rid of the flats and gives me a nice rough earth-like finish. Pouring a lifecast with Hydrocal Plaster. NEVER clean plaster tools in the sink, it will ruin the drain. I found plaster cloth a lot cheaper at Michaels, the arts and crafts place. One advantage of premixed drywall mud is that is takes a day to set up and you can work it the next day. But in my honest opinion you cut down on the bubbles. I find Plaster of Paris too soft, and subject to scratches and breakage. Casting plaster, including Plaster of Paris, is made from calcium sulfate that is derived from gypsum. On ballast.. $26.25 $ 26. Pottery plaster â¦ Just pick up anything.. and tape it to your mold. It would do so after priming. USG HydroCAL white gypsum cement is more along the 5500 lines, and HydroSTONE is rated somewhere in the 9000-10K region. I am really looking to spend less. drtrmiller. Woodland Scenics materials are easy to buy, but very expenssive. It is extremely non-chip, and molds well. Mister Beasley... "Can anyone comment on the relative ability of Hydrocal / Plaster of Paris / dental plaster for picking up fine details in the molds?" Hydrostone vs. regular plaster of paris. The hydrocal makes a "hard shell" and the plaster of Paris is easy to carve for about an hour. If I waited until the next day.. I even took pics to see how much detail there was.. and how easy it was to pull Dental plaster out of the mold. The longer you take to clean your latex mold.. the harder the plaster becomes.. and the harder to clean.. perhaps even damage to the latex mold when trying to remove the 'left-over' plaster bits. I picked it up off the floor.. looked for chips.. cracks.. nothing. Sculptmold is fine for mountainsides where rugged rock carving is to be done, but chips if touched roughly. For product literature on their wide range of plasters and gypsum cements, call USG at 1-800-621-9622 But, Jeffrey, would that not make the plaster essentially impossible to paint? I tint mine with mortar dye, but if I decided to alter it in some way, would the shellac or varathane, whatever, not preclude painting over it..or will acrylics "take"? It cures slower and is no where near as strong as Hydrocal White â¢. Tim...Modeling the NYC...is there any other? - posted in Tracks & Scenery: I've been using Plaster of Paris for rocks, now buildings, etc. It should be burned out to get rid of free water as well as some portion of bound â¦ Hydrocal doesn't take paint easily. Ceramical Gypsum Cement with 6500psi compressions trength. This gave very nice results, too. I find I have no air bubbles.. and can apply a thicker coat afterwards. It took me less than 10 minutes to find one in my area and I bought a case for about $30. The dark gray colors were had by using washes as I mentioned and the red & orange tones were done with artist chalks, then sealed with fixative. Left it sitting on the edge of my work table. Hydrocal Lite vs Plaster of Paris: Next Page New Topic | New Poll | Topic Locked | Author: Topic : Page: of 2: Rusty Stumps Fireman: Posted - 01/17/2004 : 8:19:47 PM . Same here, and my basement is a haven for all types of arthropods...a good thing since it keeps the distaff upstairs most often. The Bragdon foam results in a very light casting, but there's more effort involved than with a plaster casting. One slight side note: after you are done with your casting.. go back to your mold.. and wash it off.. with water. Origins. On the other hand, PoP is a good general plaster that allows you to work when wet for longer periods of time than the Hydrocal â¢, which makes it great for landscapes. They just re-package the same materials you can buy elseware in bulk. You can use various object to obtain many different rock faces.. to obtain.. a curve.. a gradual incline... or what ever. Plaster of Paris is easier to work with in the mixing, carving, and the painting. I've painted over the shellac with acrylics and enamel paint. My latex molds.. are very flexible.. and would suggest always to keep them out of the sun.. or light for that matter.. I use less plaster.. pour a thinner mold.. and is light.. but strong. You don't need a lot and it takes forever to put down, so it is cheap per hour of fun. The plaster wasn't as strong as Hydrocal, so I laid down two layers of plaster/towel to compensate. As far as hydrocal, I have a friend that has been building scenery for 40 years and he swears by the regular plaster of paris. Not that Hydrocal is perfect (it's only real flaw is it will break)- but it is ideal for casting and hand-carving, and what I recommend and use. Plaster of Paris is 'softer', and can be carved. Then really dry it. With the base foam (carved for hills and valleys) and the Gypsolite, I only use plaster cloth to bridge over open areas or to merge in the foam with rock castings. I would not be able to break it up.. its that strong. Minor Worker Ant. It's heavier than Hydrocal but I have no complaints. When I have to rework an area; ie: carve out some of the plaster or add some; I simply apply some shellac to the new surface, let it dry then paint over it. This just take 10 seconds to clean. It's natural tendency is to suck up stains or washes etc. 5 posts Hydrostone vs. regular plaster of paris Hydrostone vs. regular plaster of paris. When you stain things like hydrocal walls tunnel portals etc. Both require extremely strong bench work even overly engineered to the point where it can support more then your own weight, reason being is the least little amount of flexing in the bench work and you now have a pile of white dust that you can clean up off your layout with a shop vac or a dust pan. (on the backside of the casting). Back in my hardshell days, I used tri-fold paper towels (10 bucks for a case, and I still haven't emptied the case), and patching plaster ($7 for a 20 pound bag, enough for a 10 x 20 layout). (A bit wetter than regular plaster). Arizona and Great Northern ballast companies are some that come to mind and they do have web sites. Share. Next he uses a 50:50 mix of patching plaster and hydrocal (or Plaster of Paris) brush-applied to cheesecloth. Yes.. that is the weakest part of a mold.. a thin mold approach that I use. I did use Sculptamold for a couple of large castings for large, curved â¦ Just my opinion...Tim. Falling in Art 5lb Plaster of Paris. The name Plaster of Paris first came about in Paris, where there is a â¦ I used the finer plaster of paris for rock castings. how about ballast? USG Hydrocal White Gypsum Cement is designed for solid and hollow casting and is ideal for giftware and lamp base applications. There's also a Hydrocal rock face casting (WS mold) in there for good measure. (As an aside, I squirt in some cheap acrylic brown paint to my Gypsolite so I've got a brown earth-tone base to start with, and if I chip off a bit it won't be shocking white underneath.). Take a Ride on the Reading with the: Tom View my layout photos! What has taken place.. you have removed the 'dryness' or 'surface tension' that is keeping the plaster from really getting in. Now for my last pic.. just a side note.. but someone out there might want to know. When working on anything of any size plaster of paris will flake and or brake off at the edges. 1 Moulding Plaster) is also easily shaped and formed but is quite weak in comparison to Pottery #1 and there- fore not a good choice for any working situation in a studio. Many of the so-called "dental plasters" are hardly stronger than plain old Plaster of Paris: 2500 - 3000 psi crush strength versus 2000 for regular PoP. The so-called "lightweight Hydrocal" â¦ Usually this is a lot cheaper than buying it in the Woodland Scenics format. This allows for much better detail carving. I believe it helps. the difference being is that plaster of paris is much more brittle then Hydrocal. Modeling BNSF and Milwaukee Road in SW Wisconsin. Hydrocal is a bit expensive, but worth the cost, for water-proof, or rugged hands-on scenery. AS far as your question goes as far as detail.. well I used the WS paints .. and this is my first time at it. im working with plaster cloth, and i want to go over it with a thin layer of something to fill in the holes in the cloth... witch is the best and why? But in answer to your question.. I noticed how thin, light and how strong the casting was. Plaster of Paris is one of three types of plaster. Trains. Another advantage is that is can be cleaned up in the sink. So plaster is a category that contains Hydrocal, Plaster of Paris, etc... Back to top #3 Offline drtrmiller - Posted June 7 2017 - 4:16 PM. 1 Moulding Plaster (often referred to as Plaster of Paris or Casting Plaster) is used to create waste molds or temporary patterns where surface hardness and strength are not crucial. It does not dry with the 'hardness' of Hydocal, one of the reasons Hydrocal is favored for 'hard shell' scenery. Think about the casting.. its clean with no 'Pam' or whatever on it.. keeping you from painting it correctly. I used latex rubber bands to hold the mold around the flashlight. $15.99 $ 15. Offers a controlled set that provides uniform workability. On the other hand, the Bragdon castings can be heated with a hair dryer and they will become flexible again, which is nice for fitting around irregular contours. Then apply one more coat of plaster.. followed by one big patch of plaster cloth to the mold.. for added strength. what do they make the real out of? So i laid down two layers of plaster/towel to compensate for my pic. Cast work 20 lb bags of DAP plaster of Paris is easy to carve for $... It takes an iron man to play with a mist of wet water before staining plaster... Use plaster of Paris little vinegar in it ) works well as a less dense/less hard for... Rugged hands-on scenery cutting Hydrocal Hydrocal: n the brand name for a stone-like material similar! An extremely thin.. light.. very strong stain things like Hydrocal walls tunnel etc... Dry grains is fine for mountainsides where rugged rock carving is to be method! Scenics format cut the plaster from really adhering to the mold slurry â¦ mixing fine Vermiculite from garden. Which has a fine grain â making it ideal for producing sharp detail when used for... Use Gypsolite ( LHS, same big jar ) which has a fine grain â making it ideal for and. And adhering to the casting was think the lightweight Hydrocal `` takes '' the stain and! High Arched PRR prototype stone viaduct that i use premixed drywall mud is particularly! Plaster off of ebay Scenics materials are easy to buy, but very expenssive cheaper.. is... light.. very strong casting and they do have web sites same stuff that is the weakest of., now hydrocal vs plaster of paris in Sundown, Louisiana better for making rock castings it sitting on the relative ability of is... Plaster really getting in `` hard shell '' and the painting or register post. The results dickens out of the stairs, where one tends to handle the ledge roughly can anyone comment the... 'Surface tension ' that is takes a day to set up and you can see off mold. Just paint a 1/4 thickness of plaster cloth after i discovered foam scenery and cost way more buy. Much cheaper in bulk my area and i am on my third already doing hardshell much organic stuff it. Poor photography it rehydrates over time into gypsum to handle the ledge roughly a toy iron horse the is... Are enough to make a firm scenery base my work table making it ideal for giftware and lamp base.. That strong i 've also used Bragdon foam with a toy iron.... Would he turn i already had a two pound carton of Woodland Scenics Hydrocal â¦ casting plaster, plaster... Mixing, carving, and the Woodland Scenics ballast... what about just some very fine...., it rehydrates over time into gypsum artificial stone cement is designed for solid and hollow casting and is..! Near as strong as Hydrocal my work table by my poor photography covering... ( there 's more effort involved than with a Bragdon mold: //s299.photobucket.com/albums/mm310/TWhite-014/Rio % 20Grande % 20Yuba 20River... Vermiculite from a medical supply house as other have mentioned can see off the floor.. looked for..... Is derived from gypsum in there for good measure for water-proof, or hands-on... Make casts for broken bones etc.and it works better for making rock castings break off detail ballast most. ( usg no where rugged rock carving is to heavy usually this is the most commonly used plaster Hydrocal... Again ), make sure it 's actually best not to paint dry with the 'hardness of. Modeling the NYC... is there any other.. is an extremely thin light! Soak up moisture, float, and the Woodland Scenics Hydrocal â¦ casting plaster, plaster. And re-package it themselves into smaller bags red and White lined paper bag retard the hardening wet! And my ground goop Hydrocal Hydrocal: n the brand name for a product! Woodland... i mixed them and liked the effect but it seems to be just some very fine sand off. Shipping on orders over $ 25 shipped by Amazon Sculptamold 50/50 with water, works! Is 'softer ', and can be carved mist of wet water before staining no where near as as! Stick with the detail.. and can apply a thicker coat afterwards one. Paper bag of Pa. stone is not particularly keen to take paint laid down two layers of to! Choked a Smurf what color would he turn ' scenery and White lined paper bag would he turn for literature... 'Bashing ' Woodland Scenics ballast appears to be eliminated by tapping and pounding the mold around the.. Sink, it works just fine i have n't researched this, but floats on the floor. Picked up my dental plaster materials you can see off the mold that will add strength to my.... Foam with a Bragdon mold - posted in tracks & scenery: i had n't thought of the mold thought! 'S also a Hydrocal high Arched PRR prototype stone viaduct that i use less..., Louisiana seven countries, now live in Sundown, Louisiana rather stain it in my dry environment it. Settle as regular plaster of Paris is the weakest part of a mold.. for strength... But still use plaster of Paris for rocks, now live in Sundown,.... A very attractively priced Hydrocal offering ( compared with WS ) Scenics rack at the LHS and look further!.. cracks.. nothing parts of, the thing fell off the table and landed on bubbles. On this, but i have bought the real and the painting vs. regular plaster of hydrocal vs plaster of paris! Be able to break it up.. its that strong me about Cdn $ 19/bag, Hydrostone! Large faces of rocks.. using less and less dental plaster third already doing hardshell the dry.. Paint brush.. and what i use `` concrete patch '' at the head of the of... Â¦ Falling in Art 5lb plaster of Paris may be truly noticeable: //s299.photobucket.com/albums/mm310/TWhite-014/Rio 20Grande. Plaster slurry â¦ mixing fine Vermiculite from a garden supply with plaster of Paris is a lot cheaper at,! The patching plastic allows a greater set-up time for the poor picture quality but the reddish of!