High-durometer platinum-cure RTV-2 silicone for prototyping and foam casting

General Information

P-288 is a two-component, 10:1 ratio, addition cure silicone rubber mold making material. It has a high durometer, superb physical properties, minimal shrinkage and extreme chemical resistance making it an excellent choice for prototyping, casting urethane foam and other plastics. P-288 has a very long working time (4 hours), allowing for complete filling of complex mold cavities, yet still cures in 18 -24 hours at room temperature.

Typical Properties

Uncatalyzed Compound

Color

Base:TanActivator:Green

Viscosity

Base:110,000–130,000cpsActivator:1,000–1,500cps

Mixing Ratio

By weight:n.a.By volume:n.a.

Mixed Viscosity

n.a.cps

Working Time

4.0hours

Cure Time

n.a.hours

Shelf Life

n.a.

Vulcanized (Cured) Properties

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

Shore A Hardness

One day:547 days:n.a.

±4 durometer

Tear Resistance

40 ± 10ppiASTM D624

Tensile Strength

540 ± 50psiASTM D412

Elongation

250 ± 25%ASTM D412

Service Temperature

n.a.

Shrinkage

0.00%

Specific Gravity

1.30

Coverage

n.a.

Post cure Shore A (±4)

58 after a further 2 hours at 250°F