Diluting Isopon

Sep 21, 2009 4 Replies
T

Hi all



Some time ago, I took the advice of someone on this group to use Isopon for critical filling work. It works really well for tricky/exposed dents in wooden doors etc. The only issue I have with the stuff is that, as you get to the last 1/3 of the tin, it tends to have lost a lot of the liquid content and so becomes difficult to mix and apply. The tin I have has probably been in use for 9 months and opened maybe a dozen times (I always put the top back on as soon as I have removed the filler).



So what is the liquid and is there an alternative usually found in the average garage cupboard?



TIA



Phil


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1

I've successfully thinned this type polyester filler with a drop of polyester resin. (The type you use for GRP lay-up).

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S

Me too. Halfords do it in small cans, but it increases the setting time a little IME

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R

Blimey, can you still get it?!

I remember using it (called David's Isopon then, ISTR) nearly 50 years ago for repairing a corrugated iron water butt which had frozen solid, and the ice had started to push the bottom out. Mavellous stuff - the butt lasted another 20 years after that!

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L

Next time you buy a can, make sure that you stir the contents every time you use it; that way you'll get consistent density and setting times.

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