DOWSIL 890-SL Silicone Joint Sealant is a one-part, self-leveling silicone material that cures to an ultra-low-modulus silicone rubber upon exposure to atmospheric moisture. The cured silicone rubber remains flexible from -20 to 300 degreeF. Benefits: One-part, cold applied, self-leveling silicone. Self-leveling, no tooling required. Can be extruded from -20 to 120 degreeF. Flows into irregular joint widths and does not require tooling. Movement capability 100% extension and 50% compression. Ultra-low modulus. Weather and UV resistant. Fuel resistant-short term exposure. Refer to Dow form number 62-207 for more information. Cold applied, ready-to-use as supplied. No heating or special preparation. Unprimed adhesion-primer is not required for Portland cement concrete and asphalt which results in labor and material savings. Skin over- typically, the sealant will have a skin-over time of one hour or less at standard conditions allowing roadways to quickly be opened to traffic.