Instructions 1. This series of products can be applied to rubber strips with a diameter of 7-7.5mm. 2. Insert the rubber strip from the end of the glue gun, send it into the barrel, plug in the power supply and preheat for 5-8 minutes. Pull the trigger to extrude the sol and control the amount of glue. 3. During use, if you cant use up one adhesive strip at a time, you dont need to take out the adhesive strip. You can plug in the power supply to warm up for 5-8 minutes before using it directly.