Builders Choice SG-500 Gun

Battery-powered applicator for two-part 10:1 ratio structural silicones and adhesives, including Sikasil SG-500. Designed for side-by-side dual cartridges, it drives both components at a consistent ratio so the mix stays correct from the first bead to the last.

The 21V motor takes the effort out of high-viscosity two-part product — no more hand fatigue or inconsistent extrusion halfway through a run. A variable speed dial lets you dial in the bead rate to suit the joint, and the automatic anti-drip function retracts the plunger the moment you release the trigger, cutting waste and mess.

Supplied as a complete kit with two batteries, fast charger and carry case, so one battery is always on charge while you keep working.