... resinsTwo-component adhesivesEpoxies, urethanes, polysulfides, silicones, acrylics, methacrylates How to use caulking gun? Instructions:1, Open the swfit of handle ... and then pull the rack to reach the maximum.2, Put into two-companent impression ... After using, put the rack back to the original location.5, Remove the cartridge, then to repeat the above operation. Suggested Use ...