The Newborn 424 Ratchet Rod caulking gun fits 24 oz. bulk caulk or a 10 oz. or 20 oz. sausage pack and has a thrust ratio of 6:1 for use with medium viscosity materials such as silicone. The ratchet-style pressure rod has teeth that hold the rod in place after each pull of the trigger. For thinner materials, this helps minimize drips. A spout cutter is built into the side of the gun for opening cartridges without a knife, and a wrist allows the gun to be held more securely. The caulking gun includes one dual hytrel cup for use with bulk caulk or sausage packs, one ring cap for attaching nozzles, three plastic cone nozzles, and one 1/2" diameter metal nozzle.
Caulking guns, also called caulk or cartridge guns, dispense a controlled flow of products such as caulk, sealants, and adhesives from a tube or cartridge. A manual caulking gun consists of a frame which holds the tube, a trigger, and a rod which moves forward when the trigger is depressed, dispensing the product. Manual caulking guns have a thrust ratio; the higher the thrust ratio, the easier it is to dispense the caulk, sealant, or adhesive. Air-powered or pneumatic caulking guns also have a frame and a trigger, but are used with an air pressure regulator that pushes the product from the tube using air pressure instead of a rod.
Newborn Brothers Company, Inc. manufactures sealant and adhesive dispensers and accessories. The company was founded in 1974 and is headquartered in Jessup, MD.