---
product_id: 266887343
title: "ULTRACAL 30 Gypsum Cement - Plaster - for Mold Making and Casting, Ideal for Latex Molds! Takes Excellent Detail (10 lb)"
brand: "laguna"
price: "KD 37.86"
currency: KWD
in_stock: true
reviews_count: 5
category: "Laguna"
url: https://www.desertcart.com.kw/products/266887343-ultracal-30-gypsum-cement-plaster-for-mold-making-and-casting
store_origin: KW
region: Kuwait
---

# 25-35 min set time captures ultra fine detail ultra low expansion & high durability ULTRACAL 30 Gypsum Cement - Plaster - for Mold Making and Casting, Ideal for Latex Molds! Takes Excellent Detail (10 lb)

**Brand:** laguna
**Price:** KD 37.86
**Availability:** ✅ In Stock

## Summary

> 🔨 Mold like a pro, detail like a visionary!

## Quick Answers

- **What is this?** 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?** KD 37.86 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.kw](https://www.desertcart.com.kw/products/266887343-ultracal-30-gypsum-cement-plaster-for-mold-making-and-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

- • **Precision Mold Mastery:** Achieve museum-quality casts with unmatched surface hardness and detail fidelity.
- • **Industry-Grade Durability:** Formulations tougher than standard gypsum cements ensure long-lasting, resilient molds.
- • **Professional Safety First:** Designed for expert use with clear safety guidelines to protect your craft and skin.
- • **Rapid Yet Controlled Setting:** Enjoy a smooth 25-35 minute working window for perfect mold shaping without rush.
- • **Latex & Gelatin Mold Compatible:** Seamlessly integrates with your favorite flexible mold materials for versatile creativity.

## Overview

Laguna ULTRACAL 30 is a premium 10 lb gypsum cement engineered for professional mold making and casting. It offers ultra-low expansion, exceptional durability, and captures extremely fine details, making it ideal for latex and gelatin molds. With a controlled 25-35 minute set time and superior hardness, it’s the trusted choice for museum-quality and industrial pattern molds.

## 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

Review: It’s a very good product. This is my go to when making my molds. It do catch all the details and sets up pretty quickly. I highly recommend.
Review: Very good for mold casting. Very fine consistency. Great overall! $$

## 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 |
| Batteries Included? | No |
| Batteries Required? | No |
| Color | White |
| Customer Reviews | 4.6 4.6 out of 5 stars (873) |
| Date First Available | 6 May 2022 |
| Item model number | Ultracal3010lbs |
| Material Type(s) | Polyester |
| Product Dimensions | 27.94 x 20.32 x 12.7 cm; 18 g |

## Product Details

- **Brand:** Laguna
- **Item form:** Powder
- **Material:** Polyester
- **Special features:** Strong
- **Specific uses for product:** Casting

## Images

![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.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by S***E on 12 November 2025*

It’s a very good product. This is my go to when making my molds. It do catch all the details and sets up pretty quickly. I highly recommend.

### ⭐⭐⭐⭐⭐ Review
*by J***. on 4 January 2026*

Very good for mold casting. Very fine consistency. Great overall! $$

### ⭐⭐⭐⭐⭐ Review
*by A***C on 7 December 2025*

This is nice stuff! The instructions make it sound difficult to use with all the weighing and measuring, but it isn't that complicated. I didn't weigh I just measured -- one part water, 3 parts Hydrocal 30. My piece turned out great. Watch the video about how to use it though. You need to let it sit in the water for a bit and then stir it long enough to get all the lumps out. I didn't do this and my piece still turned out good, but you can see lumps in the Hydrocal 30 on the back. Bubbles, there were a few but I wasnt careful about pouring it. The first time I use a product, I see how picky it is and am not very careful, just yo see how it turns out. Also, I used an intricate mold and didn't ensure the liquid flowed into every crack. My fault. Next time I will be more careful. The cement cures hard in about 15 minutes so you have a bit of time to mix and pour before it starts to harden. I kept it in the mold for a few hours before taking it out. It popped out of the mold easily without using mold release (silicon mold -- DON'T use it in a metal mold!) And was fully cured in about 24 hours. It has a nice feel to it. I can't speak to durability because I didn't want to try to break it, because I assume that, just like anything else made of glass or ceramic, you wouldn't drop or abuse it because it will break. The last point is the product description calls it "white." It is more like a VERY light gray. I would not call it white. The powder is white but when you mix it with water, if you want white you will have a heart attack because with water it turns very gray. It lightens up a lot when fully cured.cures. The pictures show the difference. The light gray is the Hydrocal 30. The white is from another product just to give a comparison.

## 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

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*Product available on Desertcart Kuwait*
*Store origin: KW*
*Last updated: 2026-03-22*