Is it very white not off white

hydrostone is mostly very white. it can be off white depending on several factors including batch variation, water impurities when mixing, and others. it is usually very white.

What is the density of the powder?

108 lbs/cu. ft dry, 119 lbs/cu ft wet. The 50lb bag of powder is about 24"x16"x7". So that's approximately 1.5cu ft. 50/1.5 gets you about 33 and a 1/3. Right around there. I don't know the exact dimensions of the bag, yo.

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HydroStone Plaster for Scenery, Dioramas, Dentistry, Mold Casting, Ant Colony, Formicarium, Also Great for Model Railroads & Gaming (2.5 lb)

Product ID: 731422063

Details

Brand
Laguna
Item dimensions L x W x H
27.9 x 20.3 x
Number of Items
1
Shape
Flat
Specification Met
Yes

⚡Quick setting in minutes

💧Water-resistant resealable bag

🛡️40-50% harder than standard plaster

Description

🎨 Cast brilliance faster, stronger, and smarter with Hydrostone!

COLOR YOUR VISION - Easily accepts liquid or crystal pigments, so your casts can be as vibrant and unique as your ideas.
MESS FREE STORAGE - Comes in a water-tight resealable bag to keep your plaster fresh and ready, eliminating waste and clumps.
FAST TRACK YOUR CREATIVITY - Quick setting formula lets you move from mix to masterpiece in record time—no more waiting around.
UNMATCHED STRENGTH DETAIL - Hydrostone is 50% harder than typical casting plaster, ensuring durable, finely detailed results every time.
VERSATILE PRO GRADE MATERIAL - Perfect for dioramas, model railroads, gaming miniatures, dental molds, and more—professional quality for every project.

Hydrostone Plaster is a premium, quick-setting gypsum plaster designed for superior hardness and fine detail in casting. Packaged in a water-resistant resealable bag, it resists fillers and accepts pigments for vibrant, durable models ideal for dioramas, gaming, dentistry, and more.

Specifications

ASIN	B0962RJRLL
Brand	Laguna
Brand Name	Laguna
Colour	light gray
Country of Origin	USA
Customer Reviews	4.6 out of 5 stars 67 Reviews
Item Dimensions	27.9 x 20.3 x 5.1 Centimeters
Item Form	Powder
Item Shape	Flat
Item dimensions L x W x H	27.9 x 20.3 x 5.1 Centimeters
Manufacturer	USG
Material	Gypsum
Material Type	Gypsum
Number of Items	1
Part Number	Hydrostone
Shape	Flat
Specification Met	Yes

Reviews

P**S

Hydro stone for Jewelry container

16.02.2026

K**O

Good product…wish it was more budget friendly

29.09.2025

M**N

Great Product!

29.07.2025

M**U

so far so good

22.04.2022

O**Y

The product is good, however…

8.01.2024

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