100:2 Tin Cured Silicone Rubber condensed Industrial Grade Liquid Silicone For Plaster Mold
Description of Tin Cure Silicone Rubber
Tin Cure Silicone Rubber (also known as condensation-cure silicone) is a two-component, room-temperature vulcanizing (RTV-2) silicone rubber that uses a tin-based catalyst to cure. It is the global industry standard for general mold making due to its high flexibility, cost-effectiveness, and ease of use.


Technical parameter of Tin Cure Silicone Rubber
| Model |
HN-620AB |
| Feature |
high tear resistance |
| Viscosity (cs) |
170000 |
| Gravity ( G/cm 3 ) |
1.06 |
| Hardness(A°) |
20 |
| Strength( MPa) |
3.1-3.6 |
| Tear Strength (kN/m ) |
19.8-24.3 |
| Elongation(%) |
600-720 |
| Linear Shrinkage(%) |
≤0.2 |
| Curing Agent Addition Ratio(%) |
2-3% |
| Operating Time( mins ) |
30-40 |
| Curing Time( hours ) |
3-4 |
Feature of Tin Cure Silicone Rubber:
- High Tear Strength: It is extremely stretchy and resistant to tearing, making it perfect for molds with deep undercuts.
- Excellent Release Properties: It naturally repels most materials, meaning you rarely need to use chemical mold release agents.
- Low Inhibition Risk: It is highly forgiving. Unlike platinum silicone, tin cure silicone will cure over almost any surface (clay, wood, 3D prints, plaster) without chemical failure.
- Shrinkage Over Time: It shrinks slightly (typically 0.2% to 1%) during the curing process and continues to shrink very slowly over years.
- Limited Lifespan: Tin cure molds degrade faster over time (usually within a few years) and will eventually become brittle.

- Application of tin cured silicone rubber
- Replicating plaster, concrete elements, cornices, and stone veneers.
Ideal for high-volume candle and soap production due to its low cost and high flexibility.
Making molds for production casting of polyurethane, epoxy, and polyester resins

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Master Prep ➔ Build Mold Box ➔ Secure Master ➔ Weigh & Mix ➔ Vacuum Degas ➔ Pour ➔ Cure ➔ Demold ➔ Ready to Cast!