For rotten wood.

Cuprinol Ultra Tough Wood Hardener is a rapid drying formulation for use in the repair of decayed wood and is ideal for use outdoors and indoors.

It strengthens, binds and hardens loose wood fibres, to provide a solid base for filling or overpainting. Use in conjunction with Cuprinol Ultra Tough Wood Filler, to achieve a long lasting weather resistant repair.

250ml and 500ml