Our 3M™ flex pack heavy-duty applicator gun is a versatile, durable tool for applying one-part 3M™ urethanes in collision repair. Its fully enclosed metal barrel is sized for 450 mL flex packs and rod driven, friction feed application helps ensure smooth results without air pockets or pinching. Trigger-pull operation and an 18:1 thrust ratio make for easy use even for high viscosity materials. Sized for 450 mL 3M™ flex packs, our 3M™ flex pack heavy-duty applicator gun provides the sturdy toughness you'd expect for applying 3M™ windshield urethanes that exceed OEM strength requirements. This rod-driven friction feed applicator gun makes applying even high viscosity auto glass urethanes fast and easy. Urethane flex packs fit snugly into the fully enclosed barrel, helping to reduce air pockets and pinching during use. Trigger pull operation makes extruding the material easy and intuitive. The gun features an 18:1 thrust ratio, making for smooth application and reducing operator fatigue. When application is complete, the barrel twists off so operators can easily remove used or partially used flex packs for disposal or storage. Every major component of the 3M™ flex pack heavy-duty applicator gun is built from durable metal, including the barrel, rod, thumb release, handle and trigger for long product life.