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Thermally Conductive Potting Compound

Platinum-Cure Liquid Silicone for Cultural Stone Molds: A B2B Selection Guide

2026-10-13

What Is Platinum-Cure Liquid Silicone for Molds?

Platinum-cure (addition-cure) liquid silicone is a two-component rubber, mixed 1:1 by weight, that cures into a flexible elastomer. For cultural stone molds it reproduces natural stone textures with high precision and holds its shape over many casting cycles.

Why It Suits Cultural Stone Molding

Fine texture reproduction of slate, rock and split-face patterns;
Low linear shrinkage (≤0.1%) for stable tile dimensions;
High tensile and tear strength for long mold life;
Odourless, non-toxic and safe for indoor workshops;
Room-temperature or heat-accelerated cure.

Key Specifications (HN-E Series)

Property	Value
Mix ratio	1:1 by weight
Hardness range	Shore A 0 to 60
Linear shrinkage	≤0.1%
Operating temperature	−50°C to 200°C
Elongation	400–670%
Cure	3–4 h at 25°C, or ≤20 min at 80–100°C

Frequently Asked Questions

Which grade suits gypsum cultural stone? Shore A 25–40 grades are ideal; harder grades suit concrete.

Why does platinum-cure silicone sometimes not cure? Contact with tin, sulphur, amines, acids or solder flux can inhibit platinum cure.

Is it food-grade? The series is certified FDA, MSDS and RoHS.

Conclusion

For cultural stone molds, platinum-cure liquid silicone delivers fine detail, low shrinkage and long mold life for gypsum and concrete stone. Shenzhen Hanast New Materials supports mold makers with samples and grade selection.

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