The 3M™ Flex Pack Heavy Duty Applicator Gun is a versatile, durable tool for applying 1-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.