Professional gun made from heavy-duty aluminum. It features a heavy-duty spring-loaded trigger and mechanical assist. It functions with sealants in both cartridge or ‘sausage’ forms. Suitable for applying polyurethane sealants, acrylic caulking and grouts fortified with the addition of an emulsion additive, as well as the multipurpose paste dB BLOCK. It can be used for grouting decorative bricks, stone, cotto, and also to apply the injectable epoxy resin D-33 of DUROSTICK into cracked concrete columns. Available with replacement nozzles for multiple applications.