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zegospraygun on 19 Aug 24In the process of spraying materials, spray foam gun is essential. The spray foam gun needs to mix the material quickly during the spraying process, which needs to be done at a very fast speed, because the bonded material begins to harden immediately. Therefore, no material can be retained in the foam gun for a long time. Excess material needs to be removed from the spray foam gun during the purging process.