Super folding mastic application gun This folding application gun has been especially designed for easy application of all standard cartridge mastics and for ensuring a perfect seal. Non-drip: no flow of mastic when the pressure is released. Folding handle: exclusive system allows the gun to be stored away in a tool box. Very tough: made of a flexible material resistant to impacts and wear and tear. Extremely lightweight: plastic material, comfort grip, easy to use. 硅树脂和丙烯酸密封剂附件