PLASTIC TANK REPAIR KIT THIS PRODUCT IS NOT FOR USE ON PLASTIC FUEL TANKS.The repair resin is designed to harden within 8 10 minutes and cures in 30 minutes. Read all directions before beginning repair. Repairs can be made ideally at temperatures from 50°F to 75°F (10°C to 25°C).Repairs made at lower temperatures will take longer to cure. Repairs can be made on cracks up to 4 inches in length and holes up to 3/8 inch in diameter. [links]