Epoxy Recoat

K

KAM

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My boat was epoxied in 1990. Just stripped off the antifoul to inspect and it still appears in sound condition. Can't decide if it's worth applying a couple more coats whilst the bottom is clean. Anyone any experience in this area. Any opinions appreciated.
 
G'day KAM and welcome to the YBW forums.

I suspect you may get better quality answers if you put a little more info in your Bio details and in your question.

How did you strip the antifoul, is the primer coat still in tact, was a scraper used at any time?

These and other information will help us give you the right answers.

I would recommend a re coat based on the age of the treatment alone, add to this the fact that there is a good chance that you or the normal wear and tear will have done some minor damage over the years.

However, if it is cold in your location this may not be the best time to apply epoxy as most brands cure best above 20*C and with humidity below 73%.

You will have to remove any remaining primer and sand with a 200 grit then wash it, let it dry and wipe over with Acetone and lots of white rage just prior to applying more epoxy.

For an even coat apply with a West system epoxy roller and tip off with a long bristle 2 or 3 inch brush. You can avoid sanding by applying wet on tacky.

If the resin is cured between coats, wash it before you sand with a running hose and a scotch brite plastic kitchen scourer till the water no longer forms beads; this will remove the residue left by the curing process.

I hope this helps.

Avagoodweekend......
 
Thanks for the info. About 80 % of the primer is intact. It looks as if the previous owner had sanded through it in places. Theres a few chips around where the shores have been. Getting the old primer off will take as much effort as the antifoul. I am tempted to epoxy over the primer but I suspect this is unwise. I am in Scotland and its not much above freezing at he moment so I think i'll sleep on it for a week or two.
 
G'day KAM,

If you coat over the primer you will introduce two potential problems, one a thinner coat in the primed area and two, the new epoxy may not stick at full strength to the primer and even if it does you are relying on the primer to hold the epoxy in place.

The fact that it has some damage is enough reason to re coat, but only when conditions are right.

Avagoodweekend......
 
I thought it said "Epoxy Redcoat"!! I imagined you trying to glue a Butlins Camp entertainer down - what you'd do then would be entirely your own business. Adds a whole new meaning to camp entertainer!

/forums/images/graemlins/grin.gif /forums/images/graemlins/grin.gif /forums/images/graemlins/grin.gif

PS I suggest the faster catalyst!
 
you need a clean surface for the epoxy - remnant antifoul and primer is no good. Would not chose West for a DIY job - its good resin but allegedly a bit more prone to amine blush which is an issue in the cold damp UK climate. Instead I would use a solvent based epoxy like International which can be sprayed on and cures at low temperatures.
 
Or apply a couple of coats of a single pack vinyl aluminium underwater anticorrosive this will give good adhesion and has exellent waterproofing qualities and can be applied at low temperatures
 
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