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| Dow Corning 3-4000 |
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Dow Corning 3-4000 Silicone Roof Coating is a one-component, moisture-curing silicone rubber roof coating system designed for use on sprayed-in-place polyurethane foam.
It is available in two colors and is applied in two contrasting coats. When properly applied, the cured coating provides a weathertight seal that will protect polyurethane foam from degradation caused by ultraviolet light, water and other normal weathering hazards. |
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Elongation %: 125%
Permeability (20 mils @38'C and 100% RH: 3.7 perms
Temperature Stability: -37'C to 100'C
Tensile Strength, Die'C: 400 psi
Weatherometer QUV: 10000 hrs No Degradation |
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