Static mixer combines the strength and reliability of a two-part West System epoxy adhesive with point-and-shoot convenience. The self-metering coaxial cartridge dispenses a gap-filling structural epoxy that bonds to wood, metals, fiberglass, and concrete. The tube comes with a static mixer that lets you lay down a bead of thickened epoxy with any standard caulking gun. The mixer's properties make it "thinner" as it's worked, so it can be easily tooled into a non-sagging fillet or to moderate reinforcing fabrics like fiberglass. The hardener provides a long open time but has fast thru-cure. Stays workable in the static mixer for 42 minutes, making it practical for long or complicated assemblies."