Review on Highly Effective Foam-Based Expanding Caulk for Professionals by Chris Horton

I use this to apply black foam to the stones in my pond. This would be useful for all kinds of gap filling and caulking jobs around the house. You will need a professional grade pressure tank that screws onto the gun (not fingertip type). The metal parts and the nozzle on top are solid and give me good control over how much foam I dispense and where. You'll also need a can or two of Gun Cleaner, which is also available here at Revain. After using the foam, the gun must be cleaned every time, otherwise it will permanently clog. With the detergent tank screwed on, simply pull the trigger until all the foam in the gun is gone and the liquid is clear. Nice gun, easy to use. highlighted.