OVERVIEW R-Guard EMERGENCY WaterStop is a gun-grade, wet sealant that combines the best of silicone and polyurethane properties. This single-component, silyl-terminated polymer (STP) is easy to gun and tool in all weather conditions. EMERGENCY WaterStop seals and bonds to most building materials – even when submerged in water – producing a durable, high-performance, high-movement, elastomeric … Continue reading EMERGENCY WaterStop