Seam Sealer prevents sewn seams from leaking and is ideal for awnings, tents, and boat covers. The sealer is applied down the length of the seam, allowing the material to be soaked through. Repeat on both sides of the fabric, up to to two coats per side. Allow the seam 24 hours to dry completely; be sure to re-apply after washing the fabric or after heavy or repeated use. Once applied, Seam Sealer will not change the look or feel of the material.