R-Guard EMERGENCY WaterStop

PROSOCO R-Guard EMERGENCY WaterStop is a single-component STP sealant formulated to bond and waterproof in conditions where most products can't — wet substrates, active leaks, and submerged details.

What it does

It cures even underwater, waterproofs immediately on application, and bonds to most building materials without primer — turning a problem that would normally require a weather hold into a fixable detail. Useful for emergencies and for permanent details exposed to standing water.

When and where to use it

• Emergency sealing of active roof leaks and water infiltration
• Underwater or submerged repair scenarios
• Sealing roof penetrations during weather events
• Bonding and sealing transitions exposed to standing water
• Both temporary and permanent water-stop details

Key benefits

• Cures underwater and in active wet conditions
• Service temperature -70°F to 300°F
• UV resistant up to 12 months exposure
• High-movement elastomeric cure
• 99% solids, ≤30 g/L VOC, regulation-compliant
• Easy to gun and tool in any weather

Format

9.7 oz tubes; ~10 sq ft coverage at 12 mils.