Use a Silicone Basting Brush for Glue and Peel It Clean

The Problem

A bristle brush used for wood glue has a short life. Wash it immediately and you're at the sink mid-glue-up, with an assembly open and the clock running; leave it and the glue sets into the ferrule, the bristles splay, and the brush goes in the bin. Most shops end up using disposable brushes, a scrap of offcut, or a finger.

The Technique

Use a silicone basting brush from the kitchen instead.

  1. Spread glue with it exactly as you would with a bristle brush.
  2. Put it down when you're finished and walk away. No rinsing, no soaking.
  3. Once the glue has dried hard, flex the head and peel. The dried film releases in a single piece and the brush is clean.

Cured PVA doesn't bond to silicone, so the glue forms a skin over the head rather than gripping it. Silicone heads are also moulded in one piece with no ferrule, which removes the place glue collects and ruins a bristle brush.

Pro tip: Buy one and keep it in the shop rather than borrowing from the kitchen. The same property that makes it peel clean means nothing looks wrong with it afterwards, and a brush that spreads titebond on Saturday should not be spreading butter on Sunday.
Pro tip: A silicone head lays down a thinner, more even film than bristles and won't shed into the joint. It's less good at working glue into an end-grain or a deep mortise, where a stiff bristle brush or a scrap of dowel still does better.

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