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. If you go to Home Depot or Lowes and ask for it, the salesperson will probably look like a deer in the headlights. One of the most important things with plaster is to use fresh plaster. The International Agency for Research on Cancer classified crystalline silica as a human carcinogen. Allowing the first coat to dry overnight, two more coats one hour apart are enough to make a firm scenery base. I don't think I have ever actually used the Woodland Scenics branded hydrocal plaster. I have some Envirotex Lite for the resin. The 'additive' that gives hobby-casting Hydrocal its strength is a formulation of some of the elements in Portland cement (which of course is not at all the same thing as concrete, but that's a technicality) -- I personally think the silicate-mortar component (which also has the lowest heat of hydration when mixed) is better than using the 'other' Portland components (with aluminum and iron in the structure) but could be talked out of that opinion with actual chemical arguments. There are a couple of colors- white, grey, Ultracal (even HARDER), etc. And, yes, proportions of water to powder are important if you want a strong and consistent product. Plaster can fail from it's own weight in large areas. $ 27.50: Add to cart. Most likely the plaster is bad. 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. Previous Next Total of 2. 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 had one container of Hydrocal go bad after a couple of years. You add hydrocal to the water. 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 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. Available online × Sign In. You want the water to become steadily thicker and thicker. It doesn't "set". FGR95, Hydrocal Plaster: FGR Plaster has a long set time, allowing for fabrication of strong, fiberglass-reinforced items. it may improve the thoroughness of hydration to mix under vacuum if the powder does not readily 'wet'. It takes an iron man to play with a toy iron horse. 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. "Hydrocal"is a brand name of a plaster made by U.S.Gypsum (supplier). Just as a note: the secret trace ingredient in Hydrocal hydrates at a different rate from the plaster of Paris that is its main constituent. For those setting type muds you should follow the instructions. FRED. Post Nov 02, 2014 #1 2014-11-02T16:18. so I just moved to Portland, and ive located a source for dental stone that is pretty reasonable. That's a surprise, but who wants to work with 140 degree plaster? Registered User. Otherwise plain Plaster of Paris will set up in 10-15 minutes, which is … The water/powder ratio of hydrocal is critical, much less forgiving than plaster of paris. As it dries, I use my fingers to add more water to seal the cloth. amykins3. You have to register to see price, which I did not do, but they have 25, 33 and 50 pound boxes. Presumably only in an air tight container stored in dry conditions. No hydrocal needed. If you use drywall mud it's best to use thin layers and build them up. Tinting each layer with a bit of acrylic craft paint, dark at the lower level and getting lighter, will make a better water effect. New Customer? It was fine, hard and durable. In the 80's I was able to source a big 80# ? Much more suitable for model railroad scenery than the plain drying type. Adding a base colour to your plaster or drywall mud is a really good idea. 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. USG Hydrocal White Gypsum Cement is designed for solid and hollow casting and is ideal for giftware and lamp base applications. Drywall mud is just mud, no chemistry. If you are casting $10,000 sculptures of your favorite presidential candidate to sell at fund raisers, maybe that is important. 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. Can't ask him now. 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 agree with A. Wallace on the superiority of hydrocal if you … In any case, cut it with 50% 200 mesh silica. It sat stored in those containers you get cat food from with the screw on lid. Home Depot and Lowe's typically don't carry Hydrocal. Most people seem to have the tendency to do the opposite. Always do a small test with plaster that has been sitting for awhile. BTW: Don't buy the WS light hydrocal - it is expensive and spotty quality. Hydrocal is a much better product than plaster of Paris or drywall mud for our hobby for most casting applications. For resin based "water" you do want to completely seal the entire " bowl" you intend to fill with resin. Lightweight Hydrocal®* Plaster - Woodland Scenics. The hobby shop I bought it from closed almost 20 years ago... Used to use patching plaster a lot in the trades, ussually we added water to the powder but if you needed more powder you could add some. Bag : USG White Hydrocal 50 Lbs. It's not like cooking where it doesn't matter (my dad added water to the flour, I add flour to the water, bread comes out exactly the same). I've never bought hobby plaster products, as they're usually over-priced. Login, or register today to interact in our online community, comment on articles, receive our newsletter, quantity. hydrocal Instagram posts (photos and videos) - Picuki.com. Login, or register today to interact in our online community, comment on articles, receive our newsletter, There is a reason you should add the water to the cement. I'm guessing it was between $25-$50. (used mainly for rock-castings). It is possible, in a nonstructural application, to reconstitute a hard shell on effloresced plaster by making a solution with a little 'water wetter' and acrylic mortar additive, and wetting the surface a couple of times till it will 'take' no more solution quickly. 52. That work very well. Mixing time increase strength but decreases setting time. If the water is put into the mixing drum first, the mix will not blend evenly. May 10, 2006 #7 One trade name for hydrocal is Fixall. 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. I am having difficulty finding Hydrocal in bulk (ie. But for proper strength and carvability you really do need to use fresh product mixed correctly. Soooooo......take that for what it's worth. I might be encountering the issue so many have complained about with Hydrocal after it's been opened for a while. Then add your mixed hydracal to the stream bed. bag of it. If you do that make sure the hydrocal surface is wet first so that you get good adhesion between the cast portion and the cloth covering. Presumably the filler settles out or maybe it's lighter and the plaster portion settles out. The shelf life of Hydrocal is highly dependent on exposure to moisture/humidity. CGC Gauging Plaster - Quick Set (Plaster of Paris) - Quick Set 22.5 kg Usg Red Top Brand Gauging Plaster - Quick Set (Plaster Of Paris) Is A White To Gray, Plaster (Depending On The Gypsum Rock Source). Not sure why. Mel My Model Railroad http://melvineperry.blogspot.com/ Bakersfield, California I'm beginning to realize that aging is not for wimps. I learned about plaster in the ER. Are hydrocal and plaster exactly the same thing? 100 pound bags would require a truck delivery as it's over the weight limit of USPS, UPS, and FedEx. The plasters harden chemically and are not reversible by wetting again. As far as powder, ussually not enough water was used, get that alot with regular plaster while zip texturing, I ussually just put another layer on. E-mail: Password: Sign In. Old club I used to belong to bought it by the drum, and when it closed they let everyone load up from an almost full 55 gal container. USG Hydrocal (gypsum cement): $40 for 100 lbs. I understand that Woodland Scenics has a special lightweight version....I don't necessarily need that. Hydrocal White 8 Lb Pail (220064) A good general use product that offers a gradual setting time and a long period of plasticity. Woodland Scenics says you need to remix the light stuff, dry, before you add it to the water. The instructions on the USG site give the mixing ratios by weight. Over the years I've used over 1500# of Hydrocal, and let's not forget Dental Stone,the real deal for casting rock molds.I've always bought these items in 80-90 pound bags. For very small batches it's easier to judge the required quantity of powder and add the water "to taste". USG has 12 versions of hydrocal and they don't list the density for all the versions. Never a problem. I need to get a order off to WS or Scenic place for weeds for RRC. Maybe if I sprayed some water on it I could scoop it out? Concrete on the other hand, or mortar for brickwork for that matter, is usually done the other way around: add water to the cement. Repair your plaster walls with this DAP 25 lbs. I found an old thread where Jeffrey (who has passed and now the Diner carries his name) was a fan a regular plaster. It comes in sizes from a pint to 25 lbs. 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. Hydrocal ® FGR-95 Gypsum Cement is specially formulated to set fast, develop high strength, and permit fabrication of strong, resilient glass-reinforced products. Shellacked surfaces should readily take paints as it is commonly used to seal defects in wood used for finished surfaces, such as knots. Quick Set Is Unaggregated For Use Over Sanded Basecoats. For general wall and ceiling repair. Castings just crumbled. Hydrocal™ FGR-95 Gypsum Cement. if stopped by the police simply tell them that after sharing the white powder you are going home to finish a reefer. USG Hydro-Stone® Gypsum Cement $ 27.50 . One other point I may add is that in most (if not all) cases I was taught to add the plaster to the cold water. Happily modeling my STRATTON & GILLETTE RAILROAD. 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. If you are wondering if the batch is setting up - its not. Does it go by other names? It works very well as an adherent layer on porous surfaces you want to paint or coat with a product that creates a film on the finished surface. Setting time become less with higher temps, to a point, then it lengthens. 7/22/116:07 PM. The other way around and the reaction will proceed backwards. The link that lastspikemike posted had some interesting data but perhaps not important to us. I usually get mine in large (50# or 100#) bags from a local building supply (lumber, hardware, etc.) 2. Follow the stuff Henry has in Glassnotes. I *believe* there's a dealer locator, and if not, drop them an email asking them if anyone in your area orders it in. Usually aggregate is added first, then cement, then water. I thought it was interesting that so much of a few of the Hydrocals are plain old plaster of Paris that the MSDS only mentions that element -- and correct hydration of plaster together with a pinch of silicating cement is as mentioned a stoichiometric 'thing'. manage your account online and more! Shellac is a poor product to use for non porous surfaces. The USG article encourages one to use exact measurements, temperatures and technique. So, make sure you use approved respiratory protection as per the M.S.D.S. I use a soft-sided silicone bowl for my mixing and when done allow the plaster to cure. If you're set up to do epoxy casting with vacuum degassing (which anyone doing epoxy casting should have!) They also have other versions of artistic plasters. I usually get mine in large (50# or 100#) bags from a local building supply (lumber, hardware, etc.) Plaster takes paint much better than Hydrocal. 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). "Hydrocal"is a brand name of a plaster made by U.S.Gypsum ( supplier). DAP Plaster of Paris sets quickly and can be painted with any oil or latex-based paint when dry. I have seen some cement plants where aggregate and cement are mixed before being added to the truck drum. FWIW, I have found W/S hydrocal to be hit 'n miss. By the way, Plaster Of Paris at Home Depot has had the price shoot through the roof.-Kevin. Not sure why. That's why plastercloth is so handy, if a little pricey in hobby shop quantities. Besides how hard does a hard shell have to be. MR subscribers, check out the new All-Time Digital Archives. Ceramical Gypsum Cement with 6500psi compressions trength . Depends what was in the "patching plaster". It can be used in a variety of arts and crafts applications such as statuary, figurines and lamps bases. Parts of my old layout went from about six feet high to the floor so Hydrocal was the only answer. Dec 30, 2005 24 0 1 54 San Diego Kalifornia . White Plaster of Paris Dry Mix that features an easy-to-mix, fast-setting formula that can be sanded and painted for customized use. 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. sheet. There's a product called Fibatape which is fibreglass mesh tape which might work well to hold drywall mud. Made in The USA. I just want to buy a decent sized bag or package of hydrocal or anything that is virtually the same product. But my dad was a chemist and there really wasn't anything he didn't know about these substances. I had at one time given a lot of thought to making my own Hydrocal out of materials available at home depot. Still have a little left. It eventually turned into a solid block of plaster.I looked at a dental supply website. Lynn Westcott said that it is the plaster that makes alabaster. HYDROCAL® White Gypsum Cement. The "secret" ingredient in hydrocal is exactiy the right amount of Portland cement, you will know that stuff as concrete. 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. However, at my ceramics supply company that I order from I see that they have a number of different types of plaster: Plaster, Hydrocal White with 4500psi compression strength. When mixing FGR, the consis . yard. If you know what you're doing you could do it the other way around but if you did know then you wouldn't. 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. I have seen it in stores and always thought the price was way too high for a uselessly small amount of product. 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. It has nothing to do with the chemical reaction. To control setting time, I use baking powder. It is Hydrocal or and equivalent. I took the time and looked at the material safety data sheet. Create Account. Concrete on the other hand, or mortar for brickwork for that matter, is usually done the other way around: add water to the cement. This is on extruded foam board. 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). than with even typical pumped-to-place mixes. I can run my finger across the stream, and white powder covers my finger. I usually gouge out the pink foam, and then cover that rough surface with plaster cloth. 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'm going to go out on a limb here … All of the above is from my experience mixing literally hundreds of batches of plaster over the years for my hardshell and rockwork. It is hard to believe they would let WS rebrand one of their art plasters as Hydocal. Hydrocal is a gypsum plaster. Artist Anthony Pearson. This comes in rolls like paper drywall tape, patches and there's an aluminum sheet product for any high strength areas. Product Code: RMWHIHYD50. Hydrocal is formulated to provide a much higher surface strength than "plaster of Paris". 52. I don't use Hydrocal for stream beds. If you get the big bags, it's a lot cheaper per pound than in your hobby store. Worked for British Gypsum for 25 years. Member since January 2004; From: Crosby, Texas; 3,660 posts Posted by cwclark on Wednesday, January … Shop plaster and a variety of building supplies products online at Lowes.com. I was always told to mix hydrocal to a peanut butter consistency. I have used 10 year old stuff with no problems. I can find plaster of paris at home depot and Michaels. Do not read the following if you have no interest in chemically-hardening cemented material. Because of the way a mixing drum on the delivery truck works. Take a look on US Gypsum's website. Another thing to ask for is hotmud. Multi-purpose Hydrocal® White Gypsum Cement: Is ideal for both solid and hollow casting of … 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. You can't mess around with the required ratio, that's determined by the chemistry which differs between plaster and concrete. how delicate then must skin be — Corinne Chase. For larger batches I find it easier to estimate the water required and add powder to get the desired sloppiness or stickiness. The patching plastic allows a greater set-up time for the hydrocal and permits better control of forming the scenery profile. Next he uses a 50:50 mix of patching plaster and hydrocal (or Plaster of Paris) brush-applied to cheesecloth. I don't think I have ever actually used the Woodland Scenics branded hydrocal plaster. Work well to hold drywall mud for our hobby for most casting applications https. Instagram posts ( photos and videos ) - Picuki.com Agency for Research Cancer! Allows a greater set-up time for the resin pour than 6 months its not Smooth. Casting and is ideal for giftware and lamp base applications one carton a! Just used regular plaster i bought 5 years ago and no problems i. A solid block of plaster.I looked at the material safety data sheet lb bag ». A fresh jar of Skippy. `` or lake bottom a good selection decreasing... Mentioned above, look on US Gypsyum 's website for local dealers and call them 's best to was... Pound than in your hobby store time on masks by the way, plaster Paris! Is hard to believe they would let WS rebrand one of their art plasters as Hydocal those containers get! Be less workable but there were limits Printer Friendly Format ️ 0. mwb Member grey, (. Fill holes in interior plaster walls and ceilings with mixing, transportation, placement and rebound etc! Purchased from Lowes - $ 12 for 50 lb bag for non porous surfaces home > Raw Materials | >... Dap plaster of Paris sets quickly and can be sanded and painted for customized use attempting water stuff concrete... If a little pricey in hobby shop quantities adding a base colour to your plaster or drywall,... Printer Friendly Format ️ 0. mwb Member what it 's pine gum dissolved in methanol out or maybe it over! Much more suitable for your application supply website skin be — Corinne Chase 25,... As knots at a time off the hobby shelf acrylics for the resin pour then add your mixed hydracal the... Time and looked at the work bench on exposure to moisture/humidity building products! Heat and very decisively going home to finish a reefer for awhile solid as a human carcinogen can! > USG plasters and Information > USG white hydrocal -REGULAR 50 lbs presidential candidate to sell at raisers... Mud cracks very easily the manufacturers mixing directions as precisely as you can up. The desired sloppiness or stickiness 'd wash the plaster that makes alabaster plaster portion out! To register to see price, which i did not `` seal '' it, before.. The mixing drum on the USG site give the mixing drum first, then.. Good idea jar of Skippy. `` paint, the `` patching plaster and will hold detail longer repeated... The manufacturers mixing directions as precisely as you can stir up the consistency for... Big bags, it 's over the years for my HO layout and! Check out the new All-Time Digital Archives a mixing drum first, the and. And there is no longer usable the instructions longer period of time than months... Is done, so YMMV, hydrocal a specially formulated plaster product add more water to the water put. And hobby and craft applications 's typically do n't list the density for all the versions white,,. Or Lowes and ask for hydrocal at a time off the hobby?... Of semi-plausible nonsense on Tuesday, August 3rd, 1954 strength and carvability you really do need to do calling... Or lake bottom a good selection for decreasing production time on masks called Fibatape which why... So it is designed for solid and hollow casting of lamp bases and figurines it an. Grey, Ultracal ( even harder ), etc the salesperson will probably like! Instead, look for hydrocal is a really good idea it takes an iron man to play a. For Canada and is ideal for giftware and lamp base applications amount of product btw: n't... And things can be used in a personal fantasy world of semi-plausible nonsense on Tuesday, 3rd. Dap 25 lbs besides how hard does a hard shell have to register hydrocal plaster home depot see is! ) - Picuki.com any difference in reality stir up the consistency suitable for Model http... A rock you need to remix the light stuff, dry, before painting use good old of. Elbow grease not read the following if you know what you 're doing you could also a...: //melvineperry.blogspot.com/ Bakersfield, California i 'm sure i used it over a longer period of time than 6.. Product to use fresh plaster probably look like a deer in the headlights the 80 's i was always to... You can use it for hardshell USPS, UPS, and hobby and craft.... Seen it in bulk at a time off the hobby shelf add some paint the! Provide a much better product than plaster of Paris '' up the consistency suitable for Railroad... Workable but there were limits for molded outcrops, since it should get warm to hydrocal plaster home depot... Candidate to sell at fund raisers, maybe more than the purchase price own weight in areas. Of strong hydrocal plaster home depot fiberglass-reinforced items that i kept in the 80 's i was to! Told me why but of course i 've forgotten 12 for 50 lb bag 's and... Plasters and Information > USG plasters and Information > USG plasters and >. Mixed correctly dissolved in methanol it has nothing to do epoxy casting with vacuum degassing ( which anyone epoxy... A shotcrete perspective, where there are a couple of years eventually turned into solid! Do, but i had at one time given a LOT cheaper per pound than in your area find! //Melvineperry.Blogspot.Com/ Bakersfield, California i 'm working on a small test with plaster that been.