Topgun developed its unique and world-patented portable powered sealant and caulking gun in 1999. Topgun increases productivity by 200-400%, eliminates waste, and prevents worker fatigue/downtime and injury. The product has been proved in applications for more than 30 industries from scores of uses in building and construction to tank-making, boat-building, car and truck bodies, sports equipment and others. Topgun easily outperforms every other handgun on the market with bullet-proof reliability, extreme durability and long life. Operators can perform routine maintenance in the field and there are no expensive component replacements or servicing required for the life of the tool.