Burping Caulking Tube
From Research PlasticResearch Plastic developed a “self-burping” plastic caulking tube that allows air to escape the caulking tubes during the filling process, virtually eliminating the air pocket problem. This patented process not only eliminates expensive caulking application errors, but also overcomes messy and disruptive mishaps at caulking manufacturing plants.
You can identify self-burping caulking tubes, now available in major brands of silicones, acrylic latex, polyurethane and other fillers and adhesives by looking for four ridges located on the back of plastic caulking tubes. Those ridges are actually self-sealing vents that allow the air at the bottom to escape from the plastic tubes as they are filled with caulking materials.
The self-burping tubes fit into any standard 11oz. caulking gun.