Expanding Foam – Hand Held B3

Hand held expanding foam is one of those products that earns its place on every van without question. This 750ml PU polyurethane foam goes on as a liquid and expands rapidly to fill voids, seal draughts, and insulate gaps that would otherwise take ages to deal with by other means. Whether you are packing out around a new window frame, sealing a pipe penetration through a cavity wall, or stopping cold air getting through a loft hatch surround, this stuff gets the job done fast.

The yield on this can is genuinely impressive. Up to 50 times the original can volume means a single 750ml handheld unit goes a long way, especially when you are doing a run of window installs or sealing service entries on a new build. It cures to a rigid, closed-cell foam that bonds well to most common building substrates and provides a degree of thermal and acoustic insulation as a bonus.

Where Hand Held Expanding Foam Works Best

The handheld format suits trade use where you need a quick application without dragging out a gun kit. You shake the can, point the straw, and away you go. No adaptor, no gun cleaning, no residue hardening in a barrel overnight. For jobs where you only need foam occasionally or where you are moving between multiple locations in a day, the convenience of a handheld can is hard to argue with.

The quick-setting formula means you are not waiting around. Once applied, the foam begins to expand and skin over fairly quickly, so you can trim and finish sooner rather than later. Trimming is simple once fully cured: a sharp knife or handsaw cuts through cleanly, and the foam can be painted or plastered over once set.

At this price point, there is no reason not to keep a couple of cans in the van at all times. Jobs that would have required two visits can often be sorted in one go when you have the right materials on hand.