Amazon has Gorilla Waterproof Patch & Seal Tape 4-inch x 10ft on sale for $12.97 . Shipping is free with Prime or on order $25+
- PERMANENT: Creates a permanent bond that instantly seals out air, water, and moisture.
- INDOOR / OUTDOOR USE: Gorilla Waterproof Patch & Seal tape works great on indoor and outdoors repairs and even under water.
- EXTRA THICK: Has an extra thick adhesive layer and UV resistant backing.
- FLEXIBLE: Conforms to the surface to repair holes, cracks, gaps, and tears.
- FIXES LEAKS: Repairs leaks in roofs, rubber, plastic or vinyl pool liners, and so much more.
Amazon offers free shipping with $25+ orders or get free 1 day shipping on all orders with a free trial of Amazon Prime. A prime trial is also free with Amazon Family (which also gets you up to 20% off diapers among other benefits) or Amazon Student. EBT/Medicaid Cardholders can save on Prime Membership here.