On 24/06/2019 23:50, Richard Tobin wrote:
In article ,
Jim K.. wrote:

How does wood hardener work? Is it essentially dilute glue?

Styrene monomer

Thanks, and how does it harden wood?

It has a low surface tension and wets out dry porous wood before
polymerising into hard polystyrene plastic when exposed to the air. It
works reasonably well provided that the remaining wood is more or less
approximately sound. It cannot work miracles on powdery dust though.

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Regards,
Martin Brown