---
product_id: 731422063
title: "HydroStone Plaster for Scenery, Dioramas, Dentistry, Mold Casting, Ant Colony, Formicarium, Also Great for Model Railroads & Gaming (2.5 lb)"
brand: "laguna"
price: "$U10148"
currency: UYU
in_stock: false
reviews_count: 5
category: "Laguna"
url: https://www.desertcart.uy/products/731422063-hydrostone-plaster-for-scenery-dioramas-dentistry-mold-casting-ant-colony
store_origin: UY
region: Uruguay
---

# Quick setting in minutes Accepts liquid & crystal pigments 40-50% harder than standard plaster HydroStone Plaster for Scenery, Dioramas, Dentistry, Mold Casting, Ant Colony, Formicarium, Also Great for Model Railroads & Gaming (2.5 lb)

**Brand:** laguna
**Price:** $U10148
**Availability:** ❌ Out of Stock

## Summary

> 🎯 Cast with confidence, create with flair!

## Quick Answers

- **What is this?** HydroStone Plaster for Scenery, Dioramas, Dentistry, Mold Casting, Ant Colony, Formicarium, Also Great for Model Railroads & Gaming (2.5 lb) by laguna
- **How much does it cost?** $U10148 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.uy](https://www.desertcart.uy/products/731422063-hydrostone-plaster-for-scenery-dioramas-dentistry-mold-casting-ant-colony)

## 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

- • **Mess-Free & Ready:** Comes in a water-resistant resealable bag to keep your plaster fresh and spill-free.
- • **Fast-Track Creativity:** Quick setting formula means your projects go from concept to masterpiece in record time.
- • **Vibrant Customization:** Easily mix in liquid or crystal pigments to make your models truly one-of-a-kind.
- • **Ultra-Durable Castings:** Hydrostone delivers 40-50% greater hardness for museum-quality detail and longevity.
- • **Versatile Pro-Grade Material:** Perfect for dioramas, model railroads, dental molds, and intricate gaming terrain.

## Overview

Hydrostone Plaster is a premium, quick-setting gypsum plaster designed for professional-grade casting with 40-50% greater hardness than typical plaster. It accepts pigments for custom coloring, comes in a resealable water-resistant bag, and is ideal for detailed dioramas, model railroads, dental molds, and gaming scenery. Made in the USA and trusted by creatives for precision and durability.

## Description

Hydrostone quick setting white / light gray casting plaster. Full strength gypsum plaster is not cut with cheap plaster fillers like the popular brand! Designed for strength and casting detail. Accepts liquid or crystal pigment colors and stains. Packed in water tight resealable bag, not a leaky carton. Great for model railroads scenery, gaming castings, and school project dioramas. Not for body casting.

Review: This is a good product not too hard to make what I wanted it for it dries fast the color is amazing I use this to make my cement candle vessels It’s on the expensive side but it eorkef
Review: I love Hydrostone so much! It makes beautiful pieces! This is a great price!

## Features

- Hydrostone Plaster for Scenery Dioramas and Casting, Creates Super Hard Castings With Great Detail
- Quick setting, lightweight white / light gray plaster in water resistant resealable bag. Ideal for patterns, figurines, commercial casts, and sculpture. It is not for making outer or mother molds, and it is not recommended for outdoor use.
- Full strength Hydrostone gypsum plaster, not cut with cheap plaster fillers
- Designed for strength and casting detail. Hydrostone is 40% to 50% harder than casting plaster and works much like plaster in mixing, pouring, and setting.
- Accepts liquid or crystal pigment colors and stains

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0962RJRLL |
| Brand | Laguna |
| Country of Origin | USA |
| Customer Reviews | 4.5 4.5 out of 5 stars (61) |
| Date First Available | 10 January 2024 |
| Item Dimensions LxWxH | 27.9 x 20.3 x 5.1 Centimeters |
| Item Height | 2 Inches |
| Item Weight | 1 kg 130 g |
| Item Width | 8 Inches |
| Item part number | Hydrostone |
| Manufacturer | USG |
| Number of Memory Sticks | 1 |
| Product Dimensions | 27.94 x 20.32 x 5.08 cm; 1.13 kg |

## Product Details

- **Brand:** Laguna
- **Item dimensions L x W x H:** 27.9 x 20.3 x 5.1 Centimeters
- **Number of Items:** 1
- **Shape:** Flat
- **Specification Met:** Yes

## Images

![HydroStone Plaster for Scenery, Dioramas, Dentistry, Mold Casting, Ant Colony, Formicarium, Also Great for Model Railroads & Gaming (2.5 lb) - Image 1](https://m.media-amazon.com/images/I/41+6N8GEepL.jpg)
![HydroStone Plaster for Scenery, Dioramas, Dentistry, Mold Casting, Ant Colony, Formicarium, Also Great for Model Railroads & Gaming (2.5 lb) - Image 2](https://m.media-amazon.com/images/I/51wDCeNSt8L.jpg)

## Questions & Answers

**Q: Is hydrostone heavy when dry?**
A: Heaviness is relative.

**Q: Is it very white not off white**
A: 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.

**Q: What is the density of the powder?**
A: 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.

## Customer Reviews

### ⭐⭐⭐⭐ Review
*by K***O on 29 September 2025*

This is a good product not too hard to make what I wanted it for it dries fast the color is amazing I use this to make my cement candle vessels It’s on the expensive side but it eorkef

### ⭐⭐⭐⭐⭐ Review
*by M***N on 29 July 2025*

I love Hydrostone so much! It makes beautiful pieces! This is a great price!

### ⭐⭐⭐⭐⭐ Review
*by M***U on 22 April 2022*

I have no experience with casting whatsoever, so I ordered a 10lb bag to try it out in my silicone coaster molds. I originally wanted to order hydrocal, but this one was recommended for me instead. I cannot buy this locally. The package arrived intact—no problems there. The amount was as I ordered—10lbs. There is no description on how to use this product on the package. Mixing instructions took a while to find online, but it seems 1 part water : 3 parts hydrocal by weight does the trick. I added a little more water because I needed it to be less viscous (even though people do state that this may compromise the final quality of a product). I also added acrylic paint for color. (Mix it into water for uniform color). This medium sets rather quickly, but does give you enough time to shake it to get rid of bubbles. It also levels off by itself—a nice bonus. It only took me about an hour in order to de-mold and another 24hours or so for it to dry out completely. I also used 200/400/800 grit sandpaper to sand all the rough edges and washed off the dust with water (again, you need to make sure it dries out completely after that). The products look beautiful. Again, I have NO experience with this product, so I have no idea whether what I did was right or wrong, but I am sticking with this method for now. I then tried to order this product from another vendor, and get it shipped. Because of the weight, the original 50lb product (which cost ~$30 on the vendor website) incurred another $40 shipment fee. To tell you the truth, even if I pay more for it on Amazon, I think it is just easier to order here because you know exactly what you are getting (with no surprise delays or adjustment to shipment price as I had experienced with that particular vendor). If you can get this product locally, this is your cheapest option, but not everyone is so lucky.

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*Product available on Desertcart Uruguay*
*Store origin: UY*
*Last updated: 2026-02-01*