The ICFS DM400 is a professional chemical dispenser caulking gun with a steel half-barrel frame that accepts 400 ml chemical cartridges for use with low viscosity ingredients such as repairing chemical ICFS 400PE. Smooth pressure rods need less force and are more silent than ratchet-style pressure rods. After each trigger pull, the rod retracts, relieving pressure from the tube and assisting in the prevention of leaking. For increased comfort, the grip and trigger are cushioned. The cartridge is held in place by a welded plate in the rear.