Very-low-durometer platinum-cure RTV-2 mold making silicone

General Information

P-10, P-15 and P-20 RTV silicone rubbers are two-component, platinum-catalyzed systems that cure at room temperature. All of these materials have low viscosity, high elongation, high tear strength and low durometer. They are easy to mix and de-air, and will cure with virtually no shrinkage. The speed at which the rubber hardens can be dramatically accelerated with heat or with PT-Accel at room temperature. Addition-cure two-component silicone rubbers exhibit excellent chemical and heat resistance, but may show inhibition sensitivity. P-10, P-15 and P-20 offer excellent release properties and are extremely useful for casting complex shapes, animatronic skins, or any application where exceptional flexibility and tear resistance are required.

Typical Properties

Uncatalyzed Compound

Color

Base:TranslucentActivator:n.a.

Viscosity

Base:10,000–20,000cpsActivator:n.a.cps

Mixing Ratio

By weight:100:10By volume:100:10.9

Mixed Viscosity

5,000–15,000cps

Working Time

1.0–2.0hours

Cure Time

16–18hours

Shelf Life

6months

Vulcanized (Cured) Properties

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

Shore A Hardness

One day:107 days:12

±4 durometer

Tear Resistance

75 ± 25ppiASTM D624

Tensile Strength

350 ± 50psiASTM D412

Elongation

450 ± 50%ASTM D412

Service Temperature

-60 to 550°F

Shrinkage

0.00%

Specific Gravity

1.08

Coverage

25.6in³ / lb