UV protection.

Problems, how to use. Also see: "EPOXY", in the left-hand column of the Home page.

Moderators: Bill Edmundson, ttownshaw

Post Reply
User avatar
rocker
Posts: 100
Joined: Sat Oct 06, 2012 1:42 pm
Location: Fingerlakes and Marthas Vineyard
Contact:

UV protection.

Post by rocker » Mon Jan 21, 2013 6:08 am

Anybody know if there is an additive for epoxy to protect against UV degradation? :?:

User avatar
Bill Edmundson
Posts: 11134
Joined: Wed Nov 23, 2005 6:45 am
Location: Birmingham, AL, USA
Contact:

Re: UV protection.

Post by Bill Edmundson » Mon Jan 21, 2013 7:34 am

West has some UV in their hardner for bright work. But, it's not enough. Polyurethane clearcoat is the best. but, many perfer old fashion varnish.

Bill
Mini -Tug, KH Tahoe 19 & Bartender 24 - There can be no miracle recoveries without first screwing up.
Tahoe 19 Build

User avatar
pauloman
Posts: 16
Joined: Sun Mar 24, 2013 10:15 am

Re: UV protection.

Post by pauloman » Thu Mar 28, 2013 11:15 am

you cannot add UV blockers to thermoset resin systems like epoxies. Pigments keep the UV damage to the surface.
99% of clear coat products do not contain UV blockers. Because in the real world few clear coats go over epoxy and the UV blockers are very expensive. Auto clear coat (an acrylic lpu polyurethane is an exception - there are a few others).

And traditional spar varnish has natural UV blockers so good to put over an epoxy basecoat

Z_Wood
Posts: 208
Joined: Mon Apr 11, 2011 8:39 am
Location: Abu Dhabi, UAE

Re: UV protection.

Post by Z_Wood » Wed Mar 12, 2014 7:49 am

Hey sorry to bring this post back from the dead…. But wanted to know which brands would be top picks to use over an epoxy base?

Cheers

User avatar
galamb
Posts: 811
Joined: Sat Jan 17, 2009 1:37 am
Location: Inverary, Ontario - Cuddy Sport (modified)
Contact:

Re: UV protection.

Post by galamb » Wed Mar 12, 2014 4:39 pm

If you stick with the prolific marine brands - Epifanes (who also makes the West Marine house brand) or Interlux - it's hard to go wrong. They haven't been in business for many decades because they make a sub-standard product.

If you have deeper pockets there is another product out called "Bristol" (now also available at West Marine). A number of owners have been using it up north here on the Great Lakes and have got really good reports so far - like 5 years without having to recoat - perhaps not as durable under the Florida sun etc, but compared to traditional spar or any of the urethane's, poly-urethane's that is at least double the typical life span.
Graham

Yes, Plywood is "real" wood :)

A "professional" is someone who gets paid for their work - it doesn't necessarily mean they are good at it :)

Z_Wood
Posts: 208
Joined: Mon Apr 11, 2011 8:39 am
Location: Abu Dhabi, UAE

Re: UV protection.

Post by Z_Wood » Thu Mar 13, 2014 2:29 pm

Ah great thanx for the reply. Iv used the bristol finish before on bare wood. But will it stick to epoxy ?

Thanx again

User avatar
galamb
Posts: 811
Joined: Sat Jan 17, 2009 1:37 am
Location: Inverary, Ontario - Cuddy Sport (modified)
Contact:

Re: UV protection.

Post by galamb » Thu Mar 13, 2014 4:27 pm

Yes, Bristol bonds very well over epoxy and from what I have got "first hand" from users, if you want to put on multiple coats of Bristol, you do not need to sand between coats the way you do with many varnishes or other synthetics.
Graham

Yes, Plywood is "real" wood :)

A "professional" is someone who gets paid for their work - it doesn't necessarily mean they are good at it :)

Post Reply