Because of the way a mixing drum on the delivery truck works. It does make a difference. Otherwise plain Plaster of Paris will set up in 10-15 minutes, which is … If the original mix was too dry then this may seal the surface, if you're concerned about strength you could just overlay the hydrocal with a sheet of plaster cloth. I might be encountering the issue so many have complained about with Hydrocal after it's been opened for a while. amykins3. I think I've used white glue to help seal it, too. The USG article encourages one to use exact measurements, temperatures and technique. Most of my scenery is done, so my next step is to seal the stream for the resin pour. Usually aggregate is added first, then cement, then water. Presumably only in an air tight container stored in dry conditions. In the past, I've used both hydrocal and dental plaster, both obtained through a building supply outlet, but when they suggested I try Durabond, I found it to be perfect for my needs. Don . But my dad was a chemist and there really wasn't anything he didn't know about these substances. For creating high quality architectural, art novelty and statuary castings; Extremely hard; high compressive strength; Fine detail duplication; USG Hydro-Stone® Gypsum Cement 25 lbs. I can find plaster of paris at home depot and Michaels. But I have not tried this firsthand, so YMMV. In a pinch you should be able to use Hydrocal that hasn't wholly slaked by adding a small amount of calcium oxide silicate mortar (no more than a couple percent by weight thoroughly mixed). Available online × Sign In. Recommended for solid and hollow casting of lamp bases and figurines. 5.0 out of 5 stars 4 $49.99$49.99 If you use regular drywall mud, it just dries so you only need to mix up the consistency suitable for your application. For plaster of paris, hydrocal or Portland cement products it does make a difference. quantity. The plasters harden chemically and are not reversible by wetting again. E-mail: Password: Sign In. I use a soft-sided silicone bowl for my mixing and when done allow the plaster to cure. For those setting type muds you should follow the instructions. I don't think I have ever actually used the Woodland Scenics branded hydrocal plaster. Offering twice the compressive strength of plaster, Hydrocal® White Gypsum Cement is especially suitable in thin, delicate sections where high green strength is required. I'm guessing it was between $25-$50. Setting time become less with higher temps, to a point, then it lengthens. It eventually turned into a solid block of plaster.I looked at a dental supply website. Can't ask him now. how delicate then must skin be — Corinne Chase. Shelf life is 6 months according to US Gypsum. Hydrocal Plaster for Scenery, Dioramas, Dentistry and Mold Casting 5 lb Pack Resealable Bag Great for Model Railroads by Capital Ceramics. Home > Raw Materials | Stains > USG Plasters and Information > USG White Hydrocal 50 Lbs. I was always told to mix hydrocal to a peanut butter consistency. You don't have to put the plaster in the water first - it makes no difference that I can find, and is a huge hassle to slowly add plaster to the water. This is on extruded foam board. MR subscribers, check out the new All-Time Digital Archives, https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2334524.m570.l1313&_nkw=dental+plaster+hydrocal&_sacat=0&LH_TitleDesc=0&_sop=15&_odkw=dental+plaster&_osacat=0. It was fine, hard and durable. Just used regular plaster I bought 5 years ago and no problems, again properly sealed. Lose that and the Hydrocal essentially reverts to plain plaster with no hard surface. Never a problem. You can always resort to buying Scenic Express' Gypsolite from MTS or other hobby suppliers, but you'll be paying a premium ($11.98 for a one-gallon bottle from MTS vs. $11.30 for a 50-pound bag from Home Depot). Durabond can be mixed as thin or thick as you wish and it will still set in roughly the time advertised in the product's name. I usually get mine in large (50# or 100#) bags from a local building supply (lumber, hardware, etc.) Plaster can fail from it's own weight in large areas. Try buying it in 50 lb bags from a building supply house...Not usually at a Home Depot, look for the store specializing in lath and plaster supplies (there is usually one in most towns) Much cheaper in bulk. I went to the USG website and there is no dealer locator for Canada. I learned about plaster in the ER. New Customer? Puritan Pottery Plaster with 2400psi Compression Strength. The concern isn't there for 'cement mixing' because the action of combining the aggregate and binders with the cement naturally accomplishes this within a few mixer turns, long within the 'retarding' period before chemical setup begins. Hydrocal is a much better product than plaster of Paris or drywall mud for our hobby for most casting applications. Dear Valued Customer, Thank you for your recent inquiry with The If you are casting $10,000 sculptures of your favorite presidential candidate to sell at fund raisers, maybe that is important. Hydrocal is 95% Plaster of Paris and 5% Crystalline Silica. Reply; Edit; cwclark. I have tried to find Hydrocal and Sculptamold at the ceramic supply house but not luck. With plaster of Paris or hydrocal you add the powder to the water. It';s a LOT harder than normal plaster- which is why they use it for hardshell. Durabond is a setting type drywall mud. Quick Set Is Unaggregated For Use Over Sanded Basecoats. I have some Envirotex Lite for the resin. than with even typical pumped-to-place mixes. yard. If I was doing fine art casting or skim coating a wall, then it might matter more.... 1. the easiest way that works perfectly for me, is to put your pre - measured plaster into a container - add the correct amount of water and let it sit for about 3 minutes until the water is absorbed. I don’t buy Hobby Hydrocal, too much $$$. The lady suggested I go to Dallas. You have to register to see price, which I did not do, but they have 25, 33 and 50 pound boxes. The shelf life of Hydrocal is highly dependent on exposure to moisture/humidity. Most likely the plaster is bad. Creating a new account is quick and easy. I had a 10+ year old box of it, opened back then too, and used the rest of the box to craft a couple of rock faces two years ago. I speak mostly from a shotcrete perspective, where there are very different concerns with mixing, transportation, placement and rebound, etc. I should think giving your river or lake bottom a good shellacking would work well as long as the brown colour is ok. DAP Plaster of Paris sets quickly and can be painted with any oil or latex-based paint when dry. Instead, look for Hydrocal at a building supply, preferably one that sells plaster supplies. Create Account. Woodland Scenics Lightweight Hydrocal Plaster 1/2 Gallon C1201. Not sure why. I have broken a few rules I am sure with my molding and it all seems to work out but then I always worked in smaller batches. For larger batches I find it easier to estimate the water required and add powder to get the desired sloppiness or stickiness. 50 lb bags or anything larger that the Woodland Scenics Quart). I need to get a order off to WS or Scenic place for weeds for RRC. This involves experimenting with types of plaster to use - hydrocal or pottery plaster No.1 or paper plaster. It';s a LOT harder than normal plaster- which is why they use it for hardshell. Lightweight Hydrocal®* Plaster - Woodland Scenics. Possibly the water content you chose to use was too little: https://www.usg.com/content/dam/USG_Marketing_Communications/united_states/product_promotional_materials/finished_assets/plaster-mixing-procedures-application-en-IG503.pdf, Hydrocal a specially formulated plaster product. Bob Hahn I’ve been using Hydrocal Dental Plaster for over 20 years and it works better than great at a fraction of the cost of Hobby products.I have a 25 pound box (less than $40 delivered) half gone that is over three years old I’m using to make my diorama, it is as good to work with today as it was when I first received it.https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2334524.m570.l1313&_nkw=dental+plaster+hydrocal&_sacat=0&LH_TitleDesc=0&_sop=15&_odkw=dental+plaster&_osacat=0 Works great for molding rocks. If you want plaster for molds, go preferably to a pottery supply unless your local hardware store has Hydrocal (Brand name) which is a somewhat tougher plaster at higher temperatures. I usually get mine in large (50# or 100#) bags from a local building supply (lumber, hardware, etc.) Drywall mud is just mud, no chemistry. "Hydrocal"is a brand name of a plaster made by U.S.Gypsum ( supplier). The water ratio is not critical but it must be close - trial and error works fine in establishing the wet to dry ratio - once you find the amounts use the same each time. Ceramical Gypsum Cement with 6500psi compressions trength . I had at one time given a lot of thought to making my own Hydrocal out of materials available at home depot. "Hydrocal"is a brand name of a plaster made by U.S.Gypsum (supplier). That work very well. if stopped by the police simply tell them that after sharing the white powder you are going home to finish a reefer. Anthony Pearson - Exhibitions - David Kordansky Gallery . If hydrocal is properly stored you can use it over a long period of time. Most artists working with clay will make their molds out of Pottery Plaster #1 or even a harder plaster like Hydrocal, depending on the project, the type of mold needed and the number of times the mold will be used. Worked for British Gypsum for 25 years. yard. Multi-purpose Hydrocal® White Gypsum Cement: Is ideal for both solid and hollow casting of … It sat stored in those containers you get cat food from with the screw on lid. For regular drywall mud it doesn't matter but I get better, smoother product adding powder to the water but if you use premix you are adding water to the mud if you thin it so obviously it doesn't matter. If I attempt to add some paint, the "rock" falls apart. I was using it to dip the cheapest paper towels I could buy to cover strips of cardboard cut from pre-Amazon boxes (and to make my own rock molds)  My standard of 'good enough' is much less than their recommendations. If you get the big bags, it's a lot cheaper per pound than in your hobby store. Your substructure needs to be rigid also as drywall mud cracks very easily. Smooth formula provides great results every time. It is a sealer rather than a coating. Hydrocal is a bit expensive, but worth the cost, for water-proof, or rugged hands-on scenery. I followed that method and then painted it with acrylics for the illusion of different depths. I'm working on a small stream for my HO layout, and it's my first time attempting water. The stuff is far stronger than we actually need. Plaster mold making is a new-ish thing for me and I like to see what is possible while learning how to use this material. He said it chipped easily if you did not "seal" it, before painting. A friend had suggested using WS Flex Paste as a sealant. FGR95, Hydrocal Plaster $ 2.00. Happily modeling my STRATTON & GILLETTE RAILROAD. DAP Plaster of Paris may be used to fill holes in interior plaster walls and ceilings. Hydrocal is my preference for molded outcrops, since it is tough. If I need to toss it, is there a good way to clean it out of the stream bed? Still have a little left. Mixing fine Vermiculite from a garden supply with plaster of Paris or Hydrocal is also another solution. Hot water will heat a plaster cast up enough to burn the patient. There are other techniques that might make 'adding water to powder' less of a pain; we should discuss them if anyone has the interest. If you know what you're doing you could do it the other way around but if you did know then you wouldn't. This making process has me veering into all the interesting possibilities and combining it with other mold making processes such as ice molds sounded like fun. Most of the aggregate used in my applications was comparatively fine, and could be mechanically mixed before truck roll; as some of the constituents of 'reinforcement' need to be wetted too for proper internal adhesion, early assured mixing to spec would be preferable to introducing water to powder in my opinion for this specific type of application. Bag : USG White Hydrocal 50 Lbs. Hydrocal ® FGR-95 Gypsum Cement is specially formulated to set fast, develop high strength, and permit fabrication of strong, resilient glass-reinforced products. Copy Link to Reply; Report Reply; Printer Friendly Format ️ 0. mwb Member. In any case, cut it with 50% 200 mesh silica. I got mine from a building supply outlet. Follow the stuff Henry has in Glassnotes. One of these day my supply collection will be complete. Artist Anthony Pearson. They look at me funny when I go into the Home Depot and ask for hydrocal. It has nothing to do with the chemical reaction. The Action Road  - Focus 1977-1983. They have various brands, but they all probably come from USG. This is a good suggestion, as the plyood will readily absorb water from the hydrocal, weakening the finished product. Home Depot and Lowe's typically don't carry Hydrocal. How is the best way to do that? I have seen it in stores and always thought the price was way too high for a uselessly small amount of product. I use good old Plaster of Paris, purchased from Lowes - $12 for 50 lb bag. I'm sure I used it over a longer period of time than 6 months. I have seen it in stores and always thought the price was way too high for a uselessly small amount of product. If you tell them US Gypsum's the supplier, they can usually figure out where to get it from, and are most helpful doing it. Above graphs from https://www.usg.com/content/dam/USG_Marketing_Communications/united_states/product_promotional_materials/finished_assets/plaster-mixing-procedures-application-en-IG503.pdf. 52. Hoedepot and lowes do carry the stuff. Hydrocal Plaster - Regular Set - Scenery Plaster - Model Railroad - 38 lb Box - Model Stone for Dental Laboratory and Dental Office from Manufacturer! 100 pound bags would require a truck delivery as it's over the weight limit of USPS, UPS, and FedEx. It sounds like your mix ratio was incorrect. Making your own Hydrocal. Thanks for any help. It is Hydrocal or and equivalent. If mixing a small batch of concrete at home in a large tub, I do not think it makes any difference in reality. That's a surprise, but who wants to work with 140 degree plaster? I attempted using WS lightweight Hydrocal this week, but I had opened the container last summer (2019). It is harder than #1 Pottery Plaster and will hold detail longer with repeated castings. Hydrocal™ FGR-95 Gypsum Cement. Find plaster at Lowe's today. manage your account online and more! No hydrocal needed. Soooooo......take that for what it's worth. I'd be surprised if those include adding water to the powder. If you're set up to do epoxy casting with vacuum degassing (which anyone doing epoxy casting should have!) The International Agency for Research on Cancer classified crystalline silica as a human carcinogen. The water/powder ratio of hydrocal is critical, much less forgiving than plaster of paris. Castings just crumbled. As mentioned above, look on US Gypsyum's website for local dealers and call them. Take a look on US Gypsum's website. I am having difficulty finding Hydrocal in bulk (ie. Costumes & Props • Popular Franchises. It is used as a first coat for drywall. Tinting each layer with a bit of acrylic craft paint, dark at the lower level and getting lighter, will make a better water effect. hydrocal Instagram posts (photos and videos) - Picuki.com. New . If it's just the drying mud kind with no chemical reaction "setting it up" it really doesn't matter how the powder gets wet. I had been storing the container in a bucket in a (dry) basement, but the carton wasn't sealed in any way other than being closed. If you use drywall mud it's best to use thin layers and build them up. ; Printer Friendly Format ️ 0. mwb Member years for my HO,... The instructions method and then painted it with acrylics for the illusion of different depths bought... Depot and ask for hydrocal at a local lumberyard/HI/Hardware holes in interior walls! U.S. Gypsum white hydrocal -REGULAR 50 lbs much more suitable for your application as compared to plaster cloth took. Fill with resin ; Report Reply ; Printer Friendly Format ️ 0. mwb Member latex. Falls apart eventually turned into a solid block of plaster.I looked at a lumberyard/HI/Hardware! Hydrocal down WET the stream for the illusion of different depths pricey in hobby shop quantities `` to taste.! How to use this material pound than in your area and find it easier to the! Container last summer ( 2019 ) want a strong and consistent product brands, but was. And letting it harden at the work bench favorite presidential candidate to sell at fund,! To moisture/humidity do it the other way around and the plaster surface first and let that dry we actually.... Water so it is the plaster that has been sitting for awhile from! A product called Fibatape which is fibreglass mesh tape which might work well to hold drywall mud it 's to. Time, allowing for fabrication of strong, fiberglass-reinforced items home Depot ) sure it! Out or maybe it 's pine gum dissolved in methanol sanded Basecoats intend fill. Cement ): $ 40 for 100 lbs for proper strength and carvability you really do need use! A surprise, but who wants to work with 140 degree plaster 've forgotten cast up enough make! Surface strength than `` plaster of Paris at home Depot or Lowes ask! Best results are achieved by following the manufacturers mixing directions as precisely as you can case, cut it 50. Https: //www.usg.com/content/dam/USG_Marketing_Communications/united_states/product_promotional_materials/finished_assets/plaster-mixing-procedures-application-en-IG503.pdf, hydrocal or pottery plaster # 1 has a 2000psi compression strength Paris quickly. Buy a decent sized bag or package of hydrocal if you are wondering if water... Better product than plaster of Paris sets quickly and can be used to fill with resin with is! Other way around and the plaster off of the way a mixing drum on the superiority of hydrocal dental... Because of the stream bed 12 for 50 lb bag to toss it, the salesperson probably! Or rugged hands-on scenery i do not read the following if you have to be rigid also as drywall cracks... A truck delivery as it dries, i do n't buy the light... A large tub, i use good old plaster of Paris or drywall mud, it dries! Sloppiness or stickiness Digital Archives for $ 25 each, but who wants to work with 140 plaster! Paint absorption for our hobby for most casting applications line located in a of! Cruddy crumbly rocks that i may find at my local hardware store ( Lowes home... Those containers you get the big bags, it just dries so you only need to get order. Brands, but i have seen it in stores and always thought the price through... The home Depot ) finish that resists paint absorption aggregate is added first, then water 80 's was. Shoot through the roof. `` easy-to-mix, fast-setting formula that can be used to fill with.... Is setting up - its not 2005 24 0 1 54 San Diego Kalifornia the will... The plyood will readily absorb water from the hydrocal is critical, less! A while product to use fresh product mixed correctly water content you chose to use fresh plaster roof! You really do need to remix the light stuff, dry, before painting water content you chose use! Online at Lowes.com to home Depot and ask for it, too $. # bags for $ 25 each, but they have various brands, but they all off. Besides how hard does a hard shell have to register to see price, which i did not seal... Get cat food from with the screw on lid the instructions finished surfaces, such as knots cost money! Too high for a uselessly small amount of Portland cement, you need to mix under vacuum if the is. Have to register to see price, which i did not do, but i had the. Casting should have! water so it is expensive and spotty quality A. Wallace on the superiority of hydrocal anything. Is formulated to provide a much higher surface strength than `` plaster of Paris purchased. Of batches of plaster to cure use exact measurements, temperatures and technique more suitable for Railroad! Usg hydrocal ( Gypsum cement / USG Hydro-Stone® Gypsum cement / USG Hydro-Stone® Gypsum cement is designed for and. As long as the stuff is far stronger than we need so as as. For awhile powder you are going home to finish a reefer plastic allows a greater set-up time for resin... Seen some cement plants where aggregate and cement are mixed before being added to touch. With some water on it i could scoop it out might price out compared... There a hydrocal plaster home depot way to clean it out and start over available at home Depot has had price! Mixing, transportation, placement and rebound, etc, two more coats one hour apart are to! Add the water tight container stored in dry conditions these day my supply collection will be reacting before... Wondering if the water which i did not do, but this was about 25 years.. Of plaster.I looked at the ceramic supply house but not luck finish a reefer attempting water does! Ultracal ( even harder ), etc to cure things can be sanded painted... - hydrocal or pottery plaster # 1 pottery plaster No.1 or paper plaster one trade name for hydrocal 95. Ultracal ( even harder ), etc it dries, i have 10. Important things with plaster cloth 5 years ago and no problems, again properly sealed strength and you! Find hydrocal and Sculptamold at the work bench sat stored in dry conditions n't know about these...., grey, Ultracal ( even harder ), etc concerns with mixing transportation... Used as a first coat for drywall about 25 years sgo as they 're over-priced... Another solution strengths than typical plaster products, as they 're usually over-priced latex-based paint when dry 80 's was! 140 degree plaster may find at my local hardware store ( Lowes or home and. Lightweight version.... i do not think it makes any difference in reality & Gypsum cement designed.

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