Talk Composites - The Forum for Advanced Composites

HELP - Filling holes & shakes in Wood

http://www.talkcomposites.com/Topic13201.aspx

By re4med - 10/9/2014 12:30:35 PM

Hi there, could anyone please offer a little advice regarding the best product to use for filling shakes etc in wood . 
I am looking for both translucent and opaque which excepts colouring .
So far I have been using the fast cure polyurethane casting resin but continue to get air bubbles forming along the voids and sagging into them while setting .
I will also need to fill large areas so could do with something quite cost effective ?

Any pointers are greatly appreciated 

Thanks

Alex   
By Warren (Staff) - 10/9/2014 4:49:39 PM

The problem is the resin will soak into the wood and any air trapped in the wood will come out as bubbles, both of which will make the resin level drop. Also with the short pot life, the bubbles often don't have time to come out fully.

If you want a clear resin you could try our Waterclear Polyester Casting Resin. You would need to use some Solution MW Wax Gelcoat Additive to prevent the surface becoming tacky and you would also need to make sure the wood is fully dry.  You can control the pot life of this resin much better so you will have time to run a heat gun gently over the work to drive out bubbles.

Both resins accept pigments no problem. You can also use our Translucent Tinting Pigments in the polyester resin to get a range of different tinted combinations.