HN-620 A/B is a two-component tin cure (condensation cure) liquid silicone rubber that vulcanizes at room temperature. Mixed at a 100:2 ratio, it delivers excellent fluidity, low linear shrinkage (≤0.2%) and high tear strength — ideal for reproducing fine details in precast concrete, decorative concrete, architectural casting and industrial mold making.
| Property | Value |
|---|---|
| Model | HN-620 A/B / HN-630 A/B |
| Mixing Ratio (A:B) | 100:2 |
| Viscosity | 18,000–25,000 cps |
| Hardness | 20 / 30 Shore A |
| Tensile Strength | 3.1–4.1 MPa |
| Tear Strength | 19.8–24.3 kN/m |
| Elongation | 600–720% |
| Linear Shrinkage | ≤0.2% |
| Color | Transparent / White |
| Operating Time | 30–40 minutes |
| Curing Time | 3–4 hours at room temperature |