---
product_id: 436263456
title: "10 Lbs ULTRACAL 30 Gypsum Cement - Plaster - for Moldmaking and Casting, Ideal for Latex Molds! Takes Excellent Detail"
brand: "usg"
price: "R6046"
currency: ZAR
in_stock: true
category: "Usg"
url: https://www.desertcart.co.za/products/436263456-10-lbs-ultracal-30-gypsum-cement-plaster-for-moldmaking-casting
store_origin: ZA
region: South Africa
---

# Fine detail capture 10 lbs weight Durable material 10 Lbs ULTRACAL 30 Gypsum Cement - Plaster - for Moldmaking and Casting, Ideal for Latex Molds! Takes Excellent Detail

**Brand:** usg
**Price:** R6046
**Availability:** ✅ In Stock

## Summary

> 🎉 Unleash Your Creativity with Ultracal 30!

## Quick Answers

- **What is this?** 10 Lbs ULTRACAL 30 Gypsum Cement - Plaster - for Moldmaking and Casting, Ideal for Latex Molds! Takes Excellent Detail by usg
- **How much does it cost?** R6046 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/436263456-10-lbs-ultracal-30-gypsum-cement-plaster-for-moldmaking-casting)

## Best For

- usg enthusiasts

## Why This Product

- Trusted usg brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Low Expansion:** Minimizes distortion for flawless results every time.
- • **Versatile Use:** Perfect for both latex and gelatin molds.
- • **Heat Resistant:** Handles the heat during hardening like a pro.
- • **Precision Molding:** Achieve museum-quality casts with exceptional detail.
- • **Professional Grade:** Designed for serious artists and mold makers.

## Overview

The 10 lbs Ultracal 30 Gypsum Cement is a professional-grade plaster designed for moldmaking and casting. Known for its very low expansion and durability, it captures fine details, making it ideal for both latex and gelatin molds. This product is perfect for artists and professionals seeking high-quality results in their projects.

## 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.
- Instruction Sheet Included. 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 |
|---------------|-------|
| Brand | USG |
| Colour | White |
| Age Range (Description) | Kid |
| Material | Gypsum |
| Item Weight | 10 Pounds |
| Number of Items | 1 |
| Recommended Uses For Product | Modeling, Casting |
| Special Feature | Very Low Expansion, Very Durable and Excellent Detail Taking |
| UPC | 821079271791 |
| Global Trade Identification Number | 00821079271791 |
| Manufacturer | USG |
| Country of Origin | USA |
| Item model number | USGUltracal10lbs |
| ASIN | B08PH694H9 |

## Product Details

- **Brand:** USG
- **Colour:** White
- **Age Range (Description):** Kid
- **Material:** Gypsum
- **Item Weight:** 10 Pounds

## Images

![10 Lbs ULTRACAL 30 Gypsum Cement - Plaster - for Moldmaking and Casting, Ideal for Latex Molds! Takes Excellent Detail - Image 1](https://m.media-amazon.com/images/I/51ZgKu030nL.jpg)

## Questions & Answers

**Q: What kind of paint do you use on this cement?**
A: I used two different types and they are ; color pigments from direct colors, I mix it with the gypsum; the other is acrylic paint.  I sometimes mix it together.  Then I  use acrylic paint to create a design on the stone.  I hope this helps.

**Q: Does this cure better refrigerated?**
A: . It cures beautifully when you follow the directions. It doesn’t say anything about the refrigerator. I made stone molds and they were cured overnight

**Q: Is this lighter weight than regular cement, or is it the same or heavier?**
A: I find it slightly lighter. Depend on how big the mold you’re using is.

## Frequently Bought Together

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-03-01*