Tin Cure Silicone Rubber RTV2 20 Shore A High Tear Strength for Polyurethane Vacuum Casting
Price:
Negotiable
MOQ:
1 Kilogram
Delivery Time:
5-7 Days
Brand:
Hanast
Product Description
RTV2 Tin Cure Liquid Silicone Rubber for Polyurethane & Vacuum Casting — HN-620 A/B
HN-620 A/B is a tear-resistant, two-component RTV2 tin cure (condensation cure) liquid silicone rubber mixed at 100:2 and vulcanized at room temperature. With high tear strength, low shrinkage and good fluidity, it is widely used to build durable molds for polyurethane casting, vacuum casting, prototyping and foundry pattern reproduction, as well as for stone, gypsum and decorative construction molds.
Key Features
- Tear-resistant, high and low temperature resistant, acid & alkali resistant, aging resistant
- Low linear shrinkage (≤0.2%, i.e. ≤2‰) for precise, repeated reproduction of fine detail
- High tear strength 19.8–24.3 kN/m — mold can be turned over many times with long service life
- Good fluidity, self-leveling, easy bubble release and easy demolding; finished part will not turn white
- Non-toxic and odorless; ROHS & SGS certified
- Color, hardness, viscosity and operating time can be adjusted on request (OEM/ODM)
Technical Specifications
| Property | Value |
|---|---|
| Model | HN-620 A/B |
| Mixing Ratio (A:B) | 100:2 |
| Viscosity | 170,000 cps |
| Density | 1.06 g/cm³ |
| Hardness | 20 Shore A |
| Tensile Strength | 3.1–3.6 MPa |
| Tear Strength | 19.8–24.3 kN/m |
| Elongation | 600–720% |
| Linear Shrinkage | ≤0.2% (≤2‰) |
| Curing Agent Addition | 2–3% |
| Operating Time | 30–40 minutes |
| Curing Time | 3–4 hours at room temperature |
Applications
- Polyurethane (PU) casting molds and vacuum casting
- Rapid prototyping and foundry pattern reproduction
- Construction molds: large stones, gypsum, cement parts, cultural/artificial stone, Roman columns, stone carvings
- Resin & gypsum handicrafts, soap molds, tire turning and segmented molds
Trade Information
- Place of Origin: Guangdong, China
- Certification: ROHS, SGS
- Minimum Order Quantity: 1 kilogram
- Packaging: 25KG / iron drum
- Delivery Time: 5–7 days
- Payment Terms: T/T
- Price: Negotiable — contact us for wholesale and OEM quotations.
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Get in Touch
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Company
Shenzhen Hanast New Material co.,LTD
Location
Units 1210-1211, Block B, Building 6, Hengda Fashion Valley, Dalang Street, Longhua District, Shenzhen, Guangdong Province, China
Contact Person
Candy