High-elongation tin-cure RTV-2 silicone for urethane casting

General Information

GI-585 is a high strength, two-component, tin catalyzed RTV silicone rubber with excellent resistance to polyurethane resins. It is designed for casting solid polyurethane, epoxies, polyesters and other plastic parts. GI-585 is useful for applications where a strong, flexible rubber is needed.

Typical Properties

Uncatalyzed Compound

Color

Base:Off whiteActivator:Teal

Viscosity

Base:25,000–35,000cpsActivator:350cps

Mixing Ratio

By weight:100:10By volume:n.a.

Mixed Viscosity

n.a.cps

Working Time

1.0–1.5hours

Cure Time

16–18hours

Shelf Life

6months

Vulcanized (Cured) Properties

Measured at 7 days, 70°F / 50% relative humidity

Shore A Hardness

One day:157 days:20

±4 durometer

Tear Resistance

125 ± 25ppiASTM D624

Tensile Strength

450 ± 50psiASTM D412

Elongation

675 ± 50%ASTM D412

Service Temperature

n.a.

Shrinkage

0.10%

Specific Gravity

1.21

Coverage

n.a.

Shore A (3 days)

17

Base specific gravity

1.23

Elongation with GI-585A

500% (plus or minus 50)

Activator specific gravity

1.03

Optional GI-585A activator

Blue, 350 cps, working time 1.5 to 2.5 hours

Tear strength with GI-585A

100 ppi (plus or minus 25)

Tensile strength with GI-585A

425 psi (plus or minus 50)

Shore A with GI-585A (overnight / 3 days / 7 days)

20 / 22 / 26