CAULK GUNS ARE AN ESSENTIAL TOOL IN RESIDENTIAL FOUNDATION REPAIR
The caulk gun, or injector such as SEALED uses to inject polyurethane into wall cracks, was invented and patented by Canadian Theodore Witte. in 1894. He was said to have been inspired by a cake decorator’s icing gun. His gun used a ratchet to force material from a fabric bag. However, Witte’s gun never caught on as caulks and putty began to be packaged in cartridges which could be expelled with re-usable mechanical plungers or guns which are still used today.
At SEALED almost all our work is with two part epoxies and polyurethane which is mixed with water. So we often use dual channel injectors like the one shown. Many have interchangeable pushers so that we can use both 1:1 and 2:1 mixtures.
A single channel gun may run about $10 while electric dual-channel guns cost several hundred dollars.