For Silnylon Tents And Tarps, Use Gear Aid Seam Grip Sil Silicone Sealant. Product Details Seal up to 24 ft of seams with 1.5 oz of Seam Grip SIL, a durable, clear silicone sealant that bonds permanently to silicone-treated (silynylon) tents, backpacks and gear Creates a long-lasting, waterproof and flexible seal that won?t peel or crack over time; not affected by extreme heat or cold Also ideal for applying on silnylon tarps, shelters, and rainwear to keep water out (previously known as SIL Net) Choose the Sealant and Patches Kit, which includes two peel-and-stick Tenacious Tape Silnylon Patches (3?x5?); the only patch that sticks to silicone and repair holes in silicon-treated fabrics Packaging may vary Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.