Primer need on gel coat?

[Tim Good]

Adding a boot top with Trilux 33 tomorrow in fresh smooth gelcoat. Is it really necessary to prime with Primicon or will light sand be adequate?

 

[AllanG]

I lightly abraded the gelcoat, then primed with Primocon, before antifouling with Micron Extra when I raised the waterline a few years ago.....so, I would suggest abrading and priming before applying Trilux for your boot top.

 

[Spirit of Glenans]

I lightly abraded the gelcoat, then primed with Primocon, before antifouling with Micron Extra when I raised the waterline a few years ago.....so, I would suggest abrading and priming before applying Trilux for your boot top.

+1

 

[VicS]

Adding a boot top with Trilux 33 tomorrow in fresh smooth gelcoat. Is it really necessary to prime with Primicon or will light sand be adequate?

The product data sheet for Trilux 33 says

Prepaation

BARE*GRP*
Gelshield*200*for*osmosis*protection,*or*Primocon.*​

The data sheet for Primocon says

Preparation

Wash*all*surfaces*except*STEEL*with*Super*Cleaner.*
BARE*GRP*
Sand*using*180*220*grade*(grit)*paper.*​