Can anyone recommend a tack spray adhesive (preferably available in Australia) for use with Epoxy infusion. 3M Super 77 seems to get mentioned a lot but it sounds like it affectes the surface finish. Cytec Aerofix 3, from what I can determine, is intended for Polyester and Vinyl-ester resins, plus elite composites don't seem to be in business any more to supply it...

Thanks

Dave

3M super 77 has been used as a spray tack for a long time before the dedicated composites spray tacks hit the market.  Generally used as sparingly as possible, you won't have any problems with impact on the finished laminate structurally.  If you use too much, you could potentially have issues with interlaminar strength, especially if you use it for each layer. 

Surface wise, cosmetically all spray tacks leave some surface marring - the level of which is generally down to how much it is used, so use sparingly for minimal cosmetic impact. 

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant

I have just bought some tins of the 3M Super 77 spray adhesive and will do some testing to see if it works for me. If not I will need to go back to the Cytec Aerofix 3, but that is more than double the price, so I hope the 3M stuff works out.