Zinc Stearate Powder, Mold Release, Waterproofing & Casting Additive
Zinc Stearate is a fine, white hydrophobic powder widely used in resin, gypsum, and cement casting. It helps reduce sticking to molds, improves surface finish, and adds mild water resistance to finished pieces. A small amount can make a noticeable difference, especially when working with silicone molds or detailed castings.
It can be used as a dry mold release (light dusting) or mixed into casting materials to improve flow and reduce surface defects. Suitable for resin artists, cement craft makers, and general casting work.
Key Uses & Benefits:
- Works as a dry mold release powder for easy demolding
- Reduces sticking in silicone, plastic, and metal molds
- Improves surface smoothness and finish
- Adds mild waterproofing to cement and gypsum products
- Helps reduce pinholes and surface defects
- Keeps powders more free-flowing (anti-caking effect)
- Useful as a sanding aid in coatings and sealers
Common Applications:
- Effective mold release agent for resin, plaster, clay, gypsum, and cement
- Ensures easy demolding with minimal sticking
- Improves release performance in candle molds
- Prevents sticking and tearing in ceramic and pottery applications
- Enhances surface smoothness and finish quality
- Helps reduce pinholes, air bubbles, and surface defects
- Acts as a dry lubricant for tools, molds, and working surfaces
- Reduces friction during processing and shaping
- Minimizes material buildup on equipment
- Adds mild water resistance to finished products
- Improves durability of gypsum, cement, and plaster items
- Suitable for craft, industrial, and construction applications
How to Use:
As Mold Release (Dry Use):
Apply a very light dusting on the mold surface
Spread evenly using a soft brush
Remove excess before pouring material
As Additive (Mixing):
Add 0.2% – 1% by weight into gypsum or cement mix
Mix dry powder first, then add water
Avoid overuse to prevent strength reduction
Dimensions & Details
Appearance: Fine white powder
Type: Hydrophobic metallic stearate
Solubility: Insoluble in water
Odor: Odorless
Recommended dosage: 0.2% – 1%
Package Includes: 100g Zinc Stearate Powder (packed in sealed bag)
⚠️ Notes
Use only a small amount: excess can affect strength or bonding
Not soluble in water: must be mixed properly
Store in a dry place, tightly sealed
