Impact-resistant polymer frame, handle and trigger. Handle is over-moulded to prevent fatigue during prolonged use. Dual-mode operation with drip/non-drip selector switch. Integral hardened cartridge nozzle cutter and clog removal probe. Use with 300ml sealant and adhesive cartridges. Impact-resistant polymer frame, handle and trigger. Handle is over-moulded to prevent fatigue during prolonged use. Dual-mode operation with drip/non-drip selector switch. Integral hardened cartridge nozzle cutter and clog removal probe. Use with 300ml sealant and adhesive cartridges.