Epoxy Adhesive Applicator, 22 oz. Dual Cartridge Capacity, 25:1 Thrust Ratio, Accepts 1:1 and 2:1 Dual Component Mix Cartridges (Epoxy, Acrylic, Urethane), AWF Pro Our 25:1 Dual Component Pro Caulk Gun is a manual adhesive applicator gun that accepts a variety of 2 part adhesive cartridges. Its durable design is perfect for frequent high volume use and features a number of inserts and push plates to hold different sizes and combinations of adhesives. The 25:1 mechanical advantage provides 25 lbs. of application pressure for each lb. of force applied to the trigger handle, perfect for applying high viscosity caulks and adhesives. In addition, our caulking gun features an instant pressure release tab, to prevent excess leakage and an adjustment screw to limit the amount of adhesive released.