No gelcoat under waterline

[Motco80]

Originally Posted by CaptainRivet

Can you explain why you want to do what and what you wanna achieve?
Its actually nowhere e plained.
Osmosis treatment badly done?
Or surface just bad?

On the keel has already hempel on it, whats the problem with it, why want you apply more above it.

I have it done all myself from a sandblasted firbeglass surface till copper coat and supervised by an excellent specialist.
Read my post above, don't just buy whats avaliable, you can order and get the right products shipped.

Sorry it was Hempel Majestic Thick primer (thats what the pros using) , 2 layers is enough and better as 5 layers expensive interprotect. Good product but very expensive. And applying 5 layers cost time. 20l majestic is good for 2 coats on 65sqm of hull surface (underwatership 40ft cat Lavezzi). The majestic does also a barrier coat to all whats underneath, the while surface need to be sanded and properly cleaned before, use 98% Alcohol for final cleaning and no Oil based cleaner like Aceton. Paint in the late afternoon evening first coat and in the morning next 2 day 2nd coat so no sanding needed.

They have in the marina here a material called hempadur mastic 45880 of hempel.
Is that what you mean? Didnt found anything about “majestic”