If I pour this into wood, would it stick? I am trying to fill holes and place rocks and have the plaster hold the rocks like a mosaic.

I think you would be better off sticking the rocks in with something like caulking or E6000 glue. Not sure the cement would hold and it was quite expensive. You can get caulking in brown or grey to blend with the wood colour for any areas that show. Just a suggestion.

When formed into say, a 4” flat stone, how many will this container make? Starting small before committing fully to larger bag!

I have the 5 inch round mold from happy dotting company. I think this bag is going to make 3 rocks if I am lucky. Ive already made two and the bag is almost empty :(

When molded into a rock, are these strong or do they break easily?

I’ve made many in molds and had no problems. I haven’t dropped one but would believe mine are strong enough to hold up. Love painting on them and friends like them.

Is the same than hydrocal?

Not sure, have only used Ultracal 30

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Ultracal 30 Gypsum Cement 2.5 lbs - Plaster - For Mold Making and Casting, Ideal for Latex Molds! Takes Excellent Detail

Ultracal 30 Gypsum Cement 2.5 lbs - Plaster - For Mold Making and Casting, Ideal for Latex Molds! Takes Excellent Detail

Product ID: 211907566

Details

Brand
USG
Colour
Clear
Item Form
Powder
Item Package Quantity
1
Package Information
Bag

🎨1100 cm³ volume for versatile projects

🔍Ultra-fine detail capture for precision molds

⚙️Waterproof gypsum formula for durable casts

R2764

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Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎭 Capture every detail, create every dream.

BUILT TO LAST - Waterproof and durable casts that stand the test of time and creativity.
VERSATILE VOLUME - Generous 1100 cm³ capacity to fuel your next big project without constant refills.
MASTER EVERY MOLD - Achieve museum-quality detail with Ultracal 30’s ultra-fine gypsum formula.
PERFECTLY PORTABLE - 2.5 lbs bag size—ideal for both studio pros and on-the-go artists.
TRUSTED CRAFTSMANSHIP - USG brand reliability powering your sculpting and mold-making ambitions.

Ultracal 30 Gypsum Cement is a 2.5 lbs waterproof plaster powder designed for mold making and casting, especially compatible with latex molds. It offers exceptional detail capture, making it a top choice for professional artists and hobbyists seeking precision and durability in their sculpting projects.

Specifications

ASIN	B01EK5BRPW
Best Sellers Rank	#2,121,238 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #2,508 in Sculpture Molding & Casting Products #9,216 in Candy Making Supplies
Brand	USG
Brand Name	USG
Colour	Clear
Container Type	Bag
Item Form	Powder
Item Package Quantity	1
Item Weight	1.13 kg
Manufacturer Part Number	Ultracal30
Material	Gypsum
Material Type	Gypsum
Model	Ultracal30
Other Special Features of the Product	Excellent Detail Capture
Special Feature	Excellent Detail Capture
Specific Uses For Product	Craft, Model
UPC	821079268708
Unit Count	1.00 Count
Volume	1100 Cubic Centimetres
Water Resistance Level	Waterproof

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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R2764

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Africa.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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