THIS STUFF maybe, from Aberdeen, but no price.
I did see it elsewhere as a 10oz aerosol for £70+ per can, which seemed a bit steep.
ALSO HERE at £20 per tin.
For home brew, assuming you're not talking about beer, try 50/50 mix of acetone and ATF; apply regularly leave to soak and keep tapping with a small hammer.
Edited By peak4 on 08/03/2017 01:11:07