Perma-Weld solvent welding system adhesive is applied with a standard applicator gun and forms a permanent chemical bond between the PVC members. It takes an initial set in 10 minutes with complete adhesive curing in 8 to 10 hours. Perma-Weld adhesive contains approximately 21% solids. If applied at a rate of 5 mils (0.005 inches), the coverage rate would be 320 square feet per gallon, resulting in a dried film approximately one mil thick.Perma-Weld adhesive can be used on 20 and 30 mil (0.5 mm and 0.8 mm) jacketing and most Zeston 2000/300 PVC insulated fitting covers where a totally sealed system is required, such as in the USDA market. Perma-Weld adhesive is available in one quart(0.95 liter) and one gallon (3.78 liter) containers. Note: It is recommended that Perma-Weld adhesive be applied at temperatures above 40°F (4°C). Recommended use within 9-12 months of date code.