lamination question

[flyingfrizzle]

Originally Posted by Basketcase

Hey all. I've had an issue that may or may not be a big deal. Im using 1708 and vinyl ester to raise my stringers. Its a 4 stringer 20. So far I have one complete but in certain spots the glass is slightly white like there's air in there. They are small spots and not many of them but I just have to ask. I know that I originally got plenty of resin in there. I used the squeegee and worked the resin bubble back and forth many times before removing the excess. Could it be a viscosity thing and resin is draining out after I leave it? Thicken with cabosil just a tad? Ill post up a pic of what I mean but I suspect you may understand already. I've been doing fiberglass for years and never had this happen. Any input? Thanks!

If you are using a good fiberglass roller and getting the all the air spots out then they reappear then it very well could be from a thin viscosity letting it flow back out. If it happens just on the vertical areas and all the flat spots are fine then that would confirm it. If it is every where even in low spots then you need to roll it out with your roller longer and keep rolling it to it starts to tack up. Thickeners will help a bunch, cabosil and also cabosil-aerosol will keep it from running so bad. Also you can kick it off a little faster so that it dose not have as much time to run out of the vertical areas.