--- product_id: 266887343 title: "Laguna ULTRACAL 30 Gypsum Cement - Plaster - for Mold Making and Casting, Ideal for Latex Molds! Takes Excellent Detail (10 lb)" brand: "laguna" price: "¥9594" currency: JPY in_stock: false url: https://www.desertcart.jp/products/266887343-laguna-ultracal-30-gypsum-cement-plaster-for-mold-making-casting store_origin: JP region: Japan --- # 25-35 min gradual set time Lowest expansion gypsum cement Superior hardness & durability Laguna ULTRACAL 30 Gypsum Cement - Plaster - for Mold Making and Casting, Ideal for Latex Molds! Takes Excellent Detail (10 lb) **Brand:** laguna **Price:** ¥9594 **Availability:** ❌ Out of Stock ## Summary > ⚡ Mold like a pro, cast like a legend! ## Quick Answers - **What is this?** Laguna ULTRACAL 30 Gypsum Cement - Plaster - for Mold Making and Casting, Ideal for Latex Molds! Takes Excellent Detail (10 lb) by laguna - **How much does it cost?** ¥9594 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/266887343-laguna-ultracal-30-gypsum-cement-plaster-for-mold-making-casting) ## Best For - laguna enthusiasts ## Why This Product - Trusted laguna brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Safety-First Usage:** Chemical heat warning ensures you work smart and safe—professional use only. - • **Precision Mold Mastery:** Captures ultra-fine details for flawless casts every time. - • **Industry-Leading Stability:** Lowest expansion rate ensures dimensional accuracy and minimal shrinkage. - • **Extended Workability Window:** 25-35 minutes of plasticity lets you perfect your mold without rush. - • **Unmatched Strength & Durability:** Harder and stronger than standard Hydrocal cements for professional-grade results. ## Overview Laguna ULTRACAL 30 is a premium 10 lb gypsum cement designed for professional mold making and casting. It offers industry-low expansion, exceptional hardness, and a gradual set time of 25-35 minutes, making it ideal for capturing intricate details in latex and gelatin molds. Trusted by pattern makers and artists alike, it delivers museum-quality casts with superior durability. Note: Handle with care due to heat generation during curing. ## Description Super-strength gypsum cement recommended where extreme accuracy and greater surface hardness are required, as in duplicator models. Harder and stronger than HYDROCAL A-11 and HYDROCAL B-11 cements, UltraCal 30 cement has the lowest expansion of any rapid-setting gypsum cement available. Has a gradual set and long period of plasticity. Ideal for splash-casting molds and models for phenolic, polyester and epoxy resins. It was designed to give the pattern making industry the ultimate in a gypsum cement tooling medium. MIX RATIO: The manufacture recommended mix-ratio of Ultra Cal 30 is (38 parts water to 100 parts) Ultra Cal 30 by weight. The average setup time is 25-35 minutes when manually mixed. Please note that parts can be in grams, ounces or pounds etc. Do not mix with your hands, A paint paddle or electric paint mixer is recommended. WARNING: This product is for making molds of industrial patterns only. When mixed with water, ultra cal undergoes a chemical reaction which causes it to harden and then slowly become very hot and highly alkaline (corrosive to skin like drain cleaner.) If mixed incorrectly this process can happen very rapidly. DO NOT attempt to make a mold enclosing any part of the body using this material. Failure to follow these instructions can cause severe chemical burns that may require surgical removal of affected tissue. Dust from products may cause eye, skin, nose, throat, or respiratory irritation. Use eye, skin, and respiratory protection in accordance with good industrial hygiene practices. Keep out of reach of children ## Features - Ultracal 30 Gypsum Cement for Professional Molding and Plaster Casting - 10 lbs - Very Low Expansion, Very Durable. - Ideal for Latex Molds and Gelatin Molds. Popular also as a museum quality casting plaster - Takes Extremely Fine Details! - Professional Use Only. Can Get Hot When Hardening! ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B06XWR2QD8 | | Brand Name | Laguna | | Color | White | | Compatible Material | Plastic | | Container Type | Can | | Customer Reviews | 4.6 4.6 out of 5 stars (891) | | Item Form | Powder | | Item Package Quantity | 1 | | Manufacturer | USG | | Material Type | Polyester | | Model | ULTRACAL30 | | Number of Pieces | 1 | | Other Special Features of the Product | Strong | | Part Number | Ultracal3010lbs | | Specific Uses For Product | Casting | | UPC | 821079269279 | | Unit Count | 10 Pounds | | Viscosity Level | Low | | Volume | 4731.76 Milliliters | | Water Resistance Level | Not Water Resistant | ## Product Details - **Brand:** Laguna - **Item form:** Powder - **Material:** Polyester - **Special features:** Strong - **Specific uses for product:** Casting ## Images ![Laguna ULTRACAL 30 Gypsum Cement - Plaster - for Mold Making and Casting, Ideal for Latex Molds! Takes Excellent Detail (10 lb) - Image 1](https://m.media-amazon.com/images/I/61f3kZrnQEL.jpg) ## Questions & Answers **Q: Is it difficult to remove from a silicone mold once cured? Thanks!** A: No... It is very easy to remove from a silicone mold.... It does not stick to it at all.... Just make sure the item is cured.... **Q: What's the beast sealant to use to preserve my mold?** A: I got a clear seal from Lowe's. It works great. Make sure all the paint is dry before you apply it. **Q: Can this be used in alginate mold for 3D hand sculptures? if yes how many double hand molds would 10# make?** A: This gets very warm when setting up. Do not use for hand sculptures **Q: Can this be usrd on furniture** A: How do you wanna use it? My go to answer is no it probably shouldn’t be used on furniture. I used it to make molds of clay models. ## Frequently Bought Together - ULTRACAL 30 Gypsum Cement - Plaster - for Dot Mandala, Mold Making and Casting, Ideal for Latex Molds! Takes Excellent Detail (10 lb) - Tea Light Candle Holder Silicone Mold - by Happy Dotting Company - Round Shape - Tealight Candle Molds for Cement Casting - DIY & Creative Projects - Dotting and Mandala Art - Mold for Making Stones with Dome Template - Design #2 - Happy Dotting Company - Round Smooth Pebble Like for dot Art Rocks, Mandala Art DIY Crafts Painting Drawing - Gypsum, Cement Rock Casting --- ## 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.jp/products/266887343-laguna-ultracal-30-gypsum-cement-plaster-for-mold-making-casting](https://www.desertcart.jp/products/266887343-laguna-ultracal-30-gypsum-cement-plaster-for-mold-making-casting) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-11-06*