Seam Grip FC is a fast-curing, water-based tent seam sealer. Previously known as Seam Sure, this waterproofing sealant comes in a 2 fl oz bottle and seals up to 60 ft of seams or fabric. The 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. Don&';t let rain ruin an outdoor experience. Seal and waterproof tent seams in no time with Seam Sure FC and stop leaks before they happen. Long-lasting - Water-based urethane sealant is unaffected by extreme temperatures and keeps moisture out all year long Fast Acting - Formula cures in just two hours for an application on tent seams that&';s quick and easy Waterproof - Provides a water-tight seal that won&';t peel or crack over time, keeping adventurers warm and dry Flexible - Dries to a clear sealant that flexes with fabric and stays intact without flaking off All-purpose - Seals nylon, polyester, vinyl, canvas and other outdoor fabrics