---
product_id: 43838479
title: "Ultracal 30 Plaster Casting Powder for Mold Casting, Scenery, Dioramas, and Dentistry Resealable Bag Great for Model Making & Gaming (10 Pounds)."
brand: "capital ceramics"
price: "KD 44.54"
currency: KWD
in_stock: true
reviews_count: 8
category: "Capital Ceramics"
url: https://www.desertcart.com.kw/products/43838479-ultracal-30-plaster-casting-powder-for-mold-casting-scenery-dioramas
store_origin: KW
region: Kuwait
---

# Ultracal 30 Plaster Casting Powder for Mold Casting, Scenery, Dioramas, and Dentistry Resealable Bag Great for Model Making & Gaming (10 Pounds).

**Brand:** capital ceramics
**Price:** KD 44.54
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** Ultracal 30 Plaster Casting Powder for Mold Casting, Scenery, Dioramas, and Dentistry Resealable Bag Great for Model Making & Gaming (10 Pounds). by capital ceramics
- **How much does it cost?** KD 44.54 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/43838479-ultracal-30-plaster-casting-powder-for-mold-casting-scenery-dioramas)

## Best For

- capital ceramics enthusiasts

## Why This Product

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

## 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: Excellent Product - Ultracal 30 is the best. I received it in two reseal able plastic bags and it was placed into a very sturdy box. I went by the directions on package for mixing by sprinkling the plaster/gypsum into the water. I let it set for a few minutes for the gypsum to soak up the water. I slowly mixed it with a wood spoon side to side like the directions said and wow I had no bubbles at all. It mixed very well. I am so impressed with this product for my crafting. But what I am most impressed about is the special service I received from the seller when the product was lost. The man I talked to at Artistic Industries, the seller, was courteous and apologetic. He said he was very sorry this happened and he would FedEx it to me overnight. A bad situation turned out to be very pleasant one. You don’t find too many people like that very often.
Review: If you're mathematically challenged.... - If you're mathematically challenged like I am read this. The ratio is 38:100 water to plaster. That doesn't compute with me. How can I get 1 cup? Luckily I have a brother who is a math teacher! He wrote it out-view the photo. 2.24 oz water : 5.76 oz plaster = 1 cup mixed plaster. If you don't have a scale, buy one. The ratio is by weight. I figure 1 cup can be easily converted to whatever most of us need. 2 cups, just multiply by two (8.48 : 11.52 oz) a quarter cup, divide by 4 (0.46 : 1.44 oz) etc. Pour plaster to water NEVER water to plaster. Let it sit for about 5 minutes and then mix. I'm letting my mix sit while I type this so I have no opinions on it's quality atm but I wanted to share this while I waited. Hope it helps. Toodles.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B072J4LPH1 |
| Age Range (Description) | Adult |
| Best Sellers Rank | #291,731 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #1,721 in Sculpture Molding & Casting Products |
| Brand | Capital Ceramics |
| Color | White |
| Customer Reviews | 4.3 4.3 out of 5 stars (161) |
| Date First Available | May 17, 2017 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 10 pounds |
| Item dimensions L x W x H | 9.02 x 9.02 x 4.02 inches |
| Material | Gypsum Plaster |
| Number of Items | 1 |
| Product Dimensions | 9.02 x 9.02 x 4.02 inches |
| Recommended Uses For Product | Modeling |
| UPC | 027829513559 |

## Product Details

- **Age Range (Description):** Adult
- **Brand:** Capital Ceramics
- **Color:** White
- **Item Weight:** 10 Pounds
- **Item dimensions L x W x H:** 9.02 x 9.02 x 4.02 inches
- **Material:** Gypsum Plaster
- **Number of Items:** 1
- **Recommended Uses For Product:** Modeling
- **UPC:** 027829513559

## Images

![Ultracal 30 Plaster Casting Powder for Mold Casting, Scenery, Dioramas, and Dentistry Resealable Bag Great for Model Making & Gaming (10 Pounds). - Image 1](https://m.media-amazon.com/images/I/61Cbo-bojGL.jpg)

## Questions & Answers

**Q: Would this work for making a mold for soft plastic injecting?**
A: Probably but you have to ask yourself if it doesn’t work are you willing to lose all that you’ve invested.

**Q: What is the shelf life once already opened?**
A: Don’t know for certain, I’ve always used mine within a couple of months.  But, I always keep mine tightly closed in the zip lock bag and then double bag it and keep it in the house so not to collect moisture/humidity.  Moisture/humidity would be the down fall.  Otherwise I would think shelf life would be quite a long time.  Hope this helps!

**Q: How long until product in bag will take to expire once bag has been opened?**
A: I've had one over a year and still fine!

**Q: Can this be used for garden stepping stones?**
A: Yes, but it would be costly. There are probably other less expensive choices for stepping stones. Maybe something like Quikcrete.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent Product
*by D***E on September 25, 2020*

Ultracal 30 is the best. I received it in two reseal able plastic bags and it was placed into a very sturdy box. I went by the directions on package for mixing by sprinkling the plaster/gypsum into the water. I let it set for a few minutes for the gypsum to soak up the water. I slowly mixed it with a wood spoon side to side like the directions said and wow I had no bubbles at all. It mixed very well. I am so impressed with this product for my crafting. But what I am most impressed about is the special service I received from the seller when the product was lost. The man I talked to at Artistic Industries, the seller, was courteous and apologetic. He said he was very sorry this happened and he would FedEx it to me overnight. A bad situation turned out to be very pleasant one. You don’t find too many people like that very often.

### ⭐⭐⭐⭐⭐ If you're mathematically challenged....
*by M***E on June 20, 2021*

If you're mathematically challenged like I am read this. The ratio is 38:100 water to plaster. That doesn't compute with me. How can I get 1 cup? Luckily I have a brother who is a math teacher! He wrote it out-view the photo. 2.24 oz water : 5.76 oz plaster = 1 cup mixed plaster. If you don't have a scale, buy one. The ratio is by weight. I figure 1 cup can be easily converted to whatever most of us need. 2 cups, just multiply by two (8.48 : 11.52 oz) a quarter cup, divide by 4 (0.46 : 1.44 oz) etc. Pour plaster to water NEVER water to plaster. Let it sit for about 5 minutes and then mix. I'm letting my mix sit while I type this so I have no opinions on it's quality atm but I wanted to share this while I waited. Hope it helps. Toodles.

### ⭐⭐⭐ not perfect for casting for candles
*by N***A on June 9, 2025*

I bought this mix to make candle vessels, and it has some nice qualities. The color comes through beautifully — that raw cement look is exactly what I wanted. It also sets pretty fast and feels solid, not brittle. But I had a hard time getting a smooth finish. No matter how I poured or tapped the mold, I kept getting a lot of air bubbles. I tried a few different pouring techniques, but the surface never turned out 100% clean. So while it might work great for some projects, it didn’t quite meet my needs.

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*Product available on Desertcart Kuwait*
*Store origin: KW*
*Last updated: 2026-03-08*