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The Everbuild HH0119101250 C4 Pro Sealant Gun is a great skeleton applicator gun, for sealants and adhesives that are greater than 310ml. The Sealant gun is used by a variety of trade professionals and some home DIY users. It is an easy-to-use, hand-actuated tool. It has a sturdy grip which helps to achieve an accurate, neat finish. Supplied as a single unit.