Permatex Plastic Tank Repair Kit repairs cracks up to 4 inches in length and holes up to 0.375 inch in diameter. This complete kit contains everything required for making professional-quality repairs in just minutes with state-of-the-art components and easy-to-follow instructions with photographs. The repair resin is designed to harden within 8-10 minutes and cures in 30 minutes, repairing all types of plastic tanks. Repairs can be made ideally at temperatures from 50 degree Fahrenheit to 75 degree Fahrenheit.