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For superior protection from seam leakage, use IOSSO Seam Sealer. The seam sealer is ideal for protecting seams on pieces made from cotton and cotton blends, polyester, and synthetic woven fabrics. (Water repellency may vary with vinyl-coated and vinyl-laminated fabrics due to seam structure.)

Simply apply the seam sealer to sewn seams on either side and allow 24 hours to dry. The unique formula will not alter the look or feel of the fabric. IOSSO Seam Sealer is great for use on awnings, boat covers, tents, and backpacks. Choose between a ready-to-use spray bottle or a 1-gallon jug.