Seam Grip FC is a fast-curing, water-based tent seam sealer. Formerly known as Seam Sure, one bottle of this waterproofing sealant seals up to 60 ft of seams or fabric. This liquid formula is perfect for family-sized tents, tarps and pop-ups made of nylon. Just apply a thin film to the inside seams and allow to dry to a clear, flexible seal. Dont let rain ruin an outdoor experience. Seal and waterproof tent seams in no time with Seam Grip FC and stop leaks before they happen. Long-lastingWater-based urethane sealant is unaffected by extreme temperatures and keeps moisture out all year long Fast ActingFormula cures in just two hours for an application on tent seams thats quick and easy WaterproofProvides a water-tight seal that wont peel or crack over time, keeping adventurers warm and dry FlexibleDries to a clear sealant that flexes with fabric and stays intact without flaking off All-purposeSeals nylon, polyester, vinyl, canvas and other outdoor fabrics