Check the listing for details. HPI 8 1/2" x 10" Instant Poly Swimming Pool Winter Patch Kit - 2 Pack. Condition: New. Listed at 19.98 USD. HPI 8 1/2" x 10" Instant Poly Swimming Pool Winter Patch Kit - 2 Pack Item Number: 594201 Designed for the minor repair of any product made of woven poly material Swimming pool covers Boat covers Dining shelters Tent covers Grill covers Ground sheets Tarps And much more Instructions: Thoroughly clean and dry the area to be patched. Trim the Poly Patch material slightly larger than the damaged area; about 2” all around, rounding the corners. Peel off the paper backing, place patch over damaged area. Use the paper back to press the patch against repaired area. For best results, let the patch set for 24 hours before using the product. Related Products Chlorine / Bromine SHOP NOW→ Shock SHOP NOW→ Spring Chemical Kits SHOP NOW→ Algaecides SHOP NOW→ Clarifiers SHOP NOW→ Water Balancers SHOP NOW→