--- product_id: 215354657 title: "Hydrocal White Gypsum Cement 10 lbs - Molding and Casting Both Hollow and Solid" brand: "usg interiors" price: "R2128" currency: ZAR in_stock: true reviews_count: 8 category: "Usg Interiors" url: https://www.desertcart.co.za/products/215354657-hydrocal-white-gypsum-cement-10-lbs-molding-and-casting-both store_origin: ZA region: South Africa --- # 25-35 min quick set time Stark white, perfect for pigments 10 lbs premium gypsum cement Hydrocal White Gypsum Cement 10 lbs - Molding and Casting Both Hollow and Solid **Brand:** usg interiors **Price:** R2128 **Availability:** ✅ In Stock ## Summary > ⚡ Cast with confidence, create with clarity! ## Quick Answers - **What is this?** Hydrocal White Gypsum Cement 10 lbs - Molding and Casting Both Hollow and Solid by usg interiors - **How much does it cost?** R2128 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/215354657-hydrocal-white-gypsum-cement-10-lbs-molding-and-casting-both) ## Best For - usg interiors enthusiasts ## Why This Product - Trusted usg interiors brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Resealable & Ready:** Packed in a water-tight bag to keep your material fresh and dust-free for every project. - • **Vibrant White Base:** Pure white finish ensures your colorants and stains pop with professional-grade brilliance. - • **Fast-Track Creativity:** Set your projects in just 25-35 minutes—ideal for tight deadlines and rapid prototyping. - • **Durability Meets Detail:** Stronger and less brittle than Plaster of Paris, perfect for sculpting and architectural accents. - • **Precision Casting Power:** Achieve flawless detail in both hollow & solid molds with Hydrocal’s superior gypsum formula. ## Overview USG Hydrocal White Gypsum Cement is a 10 lb premium casting powder designed for both hollow and solid molds. It sets quickly in 25-35 minutes, delivering a durable, stark white finish that accepts pigments beautifully. Ideal for detailed sculptures, architectural moldings, and model scenery, it offers superior strength and workability compared to traditional plaster, all while being conveniently packaged in a resealable bag. ## Description USG brand Hydrocal quick setting white plaster. Full strength gypsum plaster is not cut with cheap plaster fillers. Designed for strength and casting detail. Accepts liquid or crystal pigment colors and stains. Packed in water tight resealable bag, not a leaky carton. Great for model railroads scenery and school project dioramas. Not for body casting. Additional Details ------------------------------ Package quantity: 1 Review: IT'S USG HYDROCAL - I used this Hydrocal to cast a stone mold and, in turn, cast 11 identical items in liquid latex. This was for a movie I worked on and I had no use for keeping this mold over the long haul. Once I was done, I broke it and tossed it. Hydrocal is biodegradable. If you're new to this and want a long-lasting mold that can handle plenty of repeated use (I'm talking years), definitely go with Ultracal. Hydrocal is great as a mold device for making a short-run number of items. Unlike Paster of Paris, there's virtually no expansion or shrink. This is why Dental Labs prefer it as part of the process for making teeth. Or, in the case of Primary mold for casting secondary liquid latex rubber molds, you can paint or slush-cast in the Hydrocal stone mold for a set of the long-term rubber mold items then toss the stone Hydrocal out. Hydrocal is also great for building scenic backgrounds for model making. Outstanding in fact, when compared to Plaster of Paris. When properly mixed, Hydrocal will be watery soupy for about the first 10 to 15 minutes (depending upon arid or humid climate). After that, it will rapidly go from a yogurt consistency, thickening to a pudding consistency, then into a thick-type mud, and finally a hard but brittle stone. Allow it to set/dry overnight into a harder, more resilient stone (way less brittle than Plaster of Paris), and you're good to go. Hydrocal Gypsum is not as hard as Ultracal, making it preferable for detail carving into the shapes you want. In humid climates such as Florida or Texas, fungal mold can grow in your Hydrocal stone if left untreated. If you choose to leave it unpainted, a light once over, periodically, with any aerosol anti-mold or fungus wet spray will be fine. Once mold does set in, that's pretty much it for your Hydrocal stone, as the exposed surface will get flaky. So if you are new to Hydrocal, build it, spray it with the antifungal, and then paint it (if you like). Finally, remember that as part of the curing process, Hydrocal gets hot enough to burn and damage skin, so never attempt to use it to cast yourself or others. Also, while mixing, make sure that you are in a well-ventilated area. This stuff is dusty! As extra protection, I always wear a decent airmask to prevent inhaling it. Not everybody does this, but Hydrocal forms a chemical reaction with liquid so I don't need it in my lungs. Hyrdocal is easy to mix, easy to cast, easy to carve, and, depending on what you want it for, can last a lifetime. If all of this sounds like exactly what you want, I don't think you'll find a better Hydrocal product than USG. Review: Arrived on time! - Item was great! ## Features - Is ideal for both solid and hollow casting of lamp bases, figurines, moldings and general castings - Offers long workability; setting expansion twice that of molding plaster and pottery plaster - Has a great value to performance ratio - Achieves a stark, white color, making it ideal for accepting colorants - Sets 25-35 minutes after machine mixing - Requires 45 parts water by weight per 100 parts plaster. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B089ZWRLJ7 | | Best Sellers Rank | #48,546 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #129 in Contact Cements | | Brand | USG Interiors | | Brand Name | USG Interiors | | Color | White | | Compatible Material | Gypsum Cement | | Container Type | Pail | | Customer Reviews | 4.6 out of 5 stars 112 Reviews | | Full Cure Time | 1 Days | | Item Form | Powder | | Item Package Quantity | 1 | | Item Weight | 10 Pounds | | Manufacturer | USG | | Material | gypsum cement | | Material Type | gypsum cement | | Model | USG_Hydrocal_10lbs | | Number of Pieces | 1 | | Other Special Features of the Product | Durable, Suitable for sculpture and architectural details | | Part Number | Hydrocal10lbs | | Special Feature | Durable, Suitable for sculpture and architectural details | | Specific Uses For Product | Casting | | UPC | 821079271449 | | Unit Count | 160 Ounce | | Viscosity Level | Medium | | Water Resistance Level | Not Water Resistant | ## Product Details - **Brand:** USG Interiors - **Item Form:** Powder - **Material:** gypsum cement - **Special Feature:** Durable, Suitable for sculpture and architectural details - **Specific Uses For Product:** Casting ## Images ![Hydrocal White Gypsum Cement 10 lbs - Molding and Casting Both Hollow and Solid - Image 1](https://m.media-amazon.com/images/I/511yjAxZdyL.jpg) ## Questions & Answers **Q: Does this dry white?** A: Yes. **Q: Can this product be used to make a mold/cast of the human foot?** A: This plaster gets hot when it sets. With enough mass it can become very very hot. It is not recommended. You can call our customer service number and we can find a plaster that is safe to use for that type of project. **Q: can this be used to make planter pots ?** A: It is still slightly porous after it has hardened so it is very likely that it will decay, stain, or something. If you put a drainage hole In The bottom and used a plastic pot inside, then it may last for quite some time. **Q: Will this work for botanical casting?** A: Hydrocal will work great for botanical casting. As plants have a variety of textures and delicate levels, it will take practice depending on what botanicals you're trying to cast. However, Hydrocal lends itself to this kind of resourceful creativity. ## Customer Reviews ### ⭐⭐⭐⭐⭐ IT'S USG HYDROCAL *by F***E on December 17, 2021* I used this Hydrocal to cast a stone mold and, in turn, cast 11 identical items in liquid latex. This was for a movie I worked on and I had no use for keeping this mold over the long haul. Once I was done, I broke it and tossed it. Hydrocal is biodegradable. If you're new to this and want a long-lasting mold that can handle plenty of repeated use (I'm talking years), definitely go with Ultracal. Hydrocal is great as a mold device for making a short-run number of items. Unlike Paster of Paris, there's virtually no expansion or shrink. This is why Dental Labs prefer it as part of the process for making teeth. Or, in the case of Primary mold for casting secondary liquid latex rubber molds, you can paint or slush-cast in the Hydrocal stone mold for a set of the long-term rubber mold items then toss the stone Hydrocal out. Hydrocal is also great for building scenic backgrounds for model making. Outstanding in fact, when compared to Plaster of Paris. When properly mixed, Hydrocal will be watery soupy for about the first 10 to 15 minutes (depending upon arid or humid climate). After that, it will rapidly go from a yogurt consistency, thickening to a pudding consistency, then into a thick-type mud, and finally a hard but brittle stone. Allow it to set/dry overnight into a harder, more resilient stone (way less brittle than Plaster of Paris), and you're good to go. Hydrocal Gypsum is not as hard as Ultracal, making it preferable for detail carving into the shapes you want. In humid climates such as Florida or Texas, fungal mold can grow in your Hydrocal stone if left untreated. If you choose to leave it unpainted, a light once over, periodically, with any aerosol anti-mold or fungus wet spray will be fine. Once mold does set in, that's pretty much it for your Hydrocal stone, as the exposed surface will get flaky. So if you are new to Hydrocal, build it, spray it with the antifungal, and then paint it (if you like). Finally, remember that as part of the curing process, Hydrocal gets hot enough to burn and damage skin, so never attempt to use it to cast yourself or others. Also, while mixing, make sure that you are in a well-ventilated area. This stuff is dusty! As extra protection, I always wear a decent airmask to prevent inhaling it. Not everybody does this, but Hydrocal forms a chemical reaction with liquid so I don't need it in my lungs. Hyrdocal is easy to mix, easy to cast, easy to carve, and, depending on what you want it for, can last a lifetime. If all of this sounds like exactly what you want, I don't think you'll find a better Hydrocal product than USG. ### ⭐⭐⭐⭐⭐ Arrived on time! *by G***H on February 2, 2026* Item was great! ### ⭐⭐⭐⭐⭐ Great product *by B***N on June 4, 2026* I love this product, easy to work with drys slow enough to work with but fast enough to paint in the same day, texture is harder than regular plaster and great for more detail silicone molds. Definitely will buy more in the future 💯. ## Frequently Bought Together - USG Hydrocal White Gypsum Cement 10 lbs - Molding and Casting Both Hollow and Solid - Smooth-On Alja-Safe™ Lifecasting Alginate Molding Powder, 3-lb Box - 6 Pack White Plaster Cloth Gauze Bandages Rolls for Art Project, Belly Cast, Mask Making, Sculptures, Body Casts, Craft Projects, Scenery Construction - Each Roll 4 inch x 15 feet (Total 90ft Long) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.za/products/215354657-hydrocal-white-gypsum-cement-10-lbs-molding-and-casting-both](https://www.desertcart.co.za/products/215354657-hydrocal-white-gypsum-cement-10-lbs-molding-and-casting-both) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-06-20*