PC Products Steel Dispensing Caulking Gun, 1/10th Gallon Smooth Rod Cartridge Gun, 250ml, 900550 Manual dispensing gun for 250-ml PC-Concrete epoxy cartridge Can also be used with any sealant, adhesive, or caulk that has coordinating standard cartridge size High 26:1 thrust ratio for applying thick materials Made from steel for strength and durability Thumb-release trigger allows controlled application