Hi Folks,

I'm having my first attempt at making some simple wet lay CF shapes and using a glass sheet bonded to MDF backing as a mould base.

The part is flat 100mm x 50mm and has a 10mm radius on leading edge which has been formed using polyester body filler.

I'm following the how to guides & have coated the mould with 6 layers of Easy lease and brushed on the is EL2 (slow) resin.

Problem is that the resin seems to be repelled from some areas of the mould leaving areas where there is no resin at all!

I tried brushing it back over the uncovered areas but it just keeps opening up again a few minutes after its covered.

I used digital scales to accurately measure resin ratios and am working in clean area at 20 deg ambient temp. 

Any ideas?

Thanks,

David.

Hanaldo is spot on again.  EasyLease does tend to cause this effect during wet lay with thinner resins.  Most gelcoats are generally fine but thinner laminating resins can fisheye in this way.

As said, a layer of mould release wax will reduce the "slippy" nature of the surface enough to help resin application. 

If you are stuck in the situation then as the resin begins to thicken and gel then the resin is less likely to fisheye off the surface.

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant

Thanks guys,

I tried with the wax & didn't have the "Fisheye" only issue is it has left a cloudy finish to the surface layer.

Any recommendations on how to improve this?