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Dow DOWSIL™ 90-006-1/2 RF Aerospace Sealant is a two component, room temperature curing, silicone elastomer that is used for bonding to primed surfaces such as glass, metals, polyester, epoxies, cured silicone rubber, and silicone resin laminates. It offers short working times, high viscosity and performance. 10:1 mix ratio by weight. 453 g Kit.