Product Catalog
RTV-2 Silicone Products
Tin and platinum cure silicone rubber for mold making and prototyping. Select a product for its full technical datasheet.
Shore A hardness
Shore A measures how far a standardized point presses into the cured rubber. Lower numbers flex and stretch; higher numbers resist pressure. Slide the marker to compare values to everyday objects.
40Shore A
Feels like a soft door seal
Pliable and springs back.
Tear strength
Tear strength (pounds per inch, ASTM D624) is how well the cured rubber resists a small nick growing into a rip. Higher values survive repeated demolding, undercuts, and thin cross-sections. Lower values suit simple molds and gentler handling.
Mixed viscosity
Viscosity is how readily the mixed rubber flows, measured in centipoise (cps). Low viscosity pours thin and captures fine detail. High viscosity holds its position on vertical surfaces.
Log scale, 1 to 100,000 cps
Cure type
Both cure at room temperature into flexible molds. The catalyst chemistry differs, and that drives the choice.
| Tin cure | Platinum cure | |
|---|---|---|
| Cost | Lower | Higher |
| Cure inhibition | Cures on almost any surface | Sensitive to sulfur clays and some 3D-printed parts |
| Shrinkage | Slight shrinkage while curing | Near zero |
| Mold life | Good for shorter production runs | Longer library life |
General guidance. Confirm fit with our team for your application.
21 of 21 products
| SKU | Product | Cure | Shore A (7 day) | Mixed viscosity (cps) |
|---|---|---|---|---|
| GI-1000 | High-tear tin-cure RTV-2 mold making silicone | Tin | 32 | 30,000–45,000 |
| GI-1032 | Medium-durometer tin-cure RTV-2 case mold silicone | Tin | 36 | 40,000–50,000 |
| GI-1040 | Firm-durometer tin-cure RTV-2 silicone for foam casting | Tin | 40 | 50,000–65,000 |
| GI-1100 | Medium-durometer tin-cure RTV-2 mold making silicone | Tin | 25 | 65,000–80,000 |
| GI-1110 | Low-durometer high-elongation tin-cure RTV-2 mold making silicone | Tin | 10 | 7,000–15,000 |
| GI-1120 | Medium-durometer tin-cure RTV-2 mold making silicone | Tin | 20 | 25,000–35,000 |
| GI-1210 | Low-durometer tin-cure RTV-2 mold making silicone | Tin | 10 | 5,000–10,000 |
| GI-1220 | Medium-durometer tin-cure RTV-2 mold making silicone | Tin | 20 | 15,000–25,000 |
| GI-300B | Firm-durometer tin-cure RTV-2 potting and encapsulation silicone | Tin | 50 | 5,000–15,000 |
| GI-311B | Medium-durometer tin-cure RTV-2 potting and encapsulation silicone | Tin | 44 | 3,000–13,000 |
| GI-312B | Firm-durometer tin-cure RTV-2 potting and encapsulation silicone | Tin | 60 | 15,000–25,000 |
| GI-320B | Firm-durometer tin-cure RTV-2 potting and encapsulation silicone | Tin | 50 | 25,000–35,000 |
| GI-360B | Firm-durometer tin-cure RTV-2 potting and encapsulation silicone | Tin | 64 | 35,000–45,000 |
| GI-380B | Firm-durometer tin-cure RTV-2 potting and encapsulation silicone | Tin | 74 | 15,000–25,000 |
| GI-384 | Low-viscosity tin-cure RTV-2 silicone for urethane casting | Tin | 30 | 10,000–20,000 |
| GI-386 | Fast-cure tin-cure RTV-2 silicone base for T.O. catalyst | Tin | n.a. | 10,000–12,000 |
| GI-491 | Chemical-resistant tin-cure RTV-2 mold making silicone | Tin | 26 | 30,000–45,000 |
| GI-585 | High-elongation tin-cure RTV-2 silicone for urethane casting | Tin | 20 | n.a. |
| GI-650 | Medium-durometer tin-cure RTV-2 mold making silicone | Tin | 27 | 20,000–30,000 |
| GI-739 | Low-durometer thixotropic tin-cure RTV-2 brush-on silicone | Tin | 18 | 300,000–350,000 |
| GI-765 | Medium-durometer thixotropic tin-cure RTV-2 brush-on silicone | Tin | 28 | 400,000–450,000 |
Supplemental products
Activators and catalysts used with GI-Series bases.
| SKU | Product |
|---|---|
| GI-177A | GI-177 fast-cure activator for GI-Series silicones |
| GI-179A | GI-179 high-elongation activator for GI-Series silicones |
| GI-2020A | GI-2020 library-life activator for GI-Series silicones |
| GI-800A | GI-800 library-life activator for GI-Series silicones |
| GI-UFC | Ultra-fast catalyst for GI-Series silicones |
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Help Me Pick walks through your application, then prepares a technical inquiry for our team to confirm before you order.