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Old 04-10-2018, 11:03 AM   #1
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Exterior Epoxy


Looking for advice on which exterior epoxy to use when replacing damaged wood on window casings, seal and all exterior wood in general. What brands do you guys recommend? Which ones are the easiest to work with and that sand and take paint easily?
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Old 04-10-2018, 11:42 AM   #2
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Re: Exterior Epoxy


It's not epoxy, but I have used P L construction adhesive for this and it holds up better than the wood to outdoors environment.


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Old 04-10-2018, 01:24 PM   #3
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Re: Exterior Epoxy


Just Bondo
The miniwax brand is just a more expensive version. The miniwax hardener can be used with any. Just in case you cant get all the rot out and to harden the old wood fibers for it to stick better.

Then use a primer before painting after you sand,
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Old 04-10-2018, 01:42 PM   #4
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Re: Exterior Epoxy


Look at the Abatron wood epoxy this is a very good product.
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Old 04-10-2018, 04:30 PM   #5
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Re: Exterior Epoxy


I prefer to cut out the rotten wood and let in new wood. IF you don't get all the bad wood out prior to patching, the filler will fail sooner or later.
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Old 04-11-2018, 03:38 PM   #6
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Re: Exterior Epoxy


http://www.advancedrepair.com/archit...oxy_intro.html

This is the only thing I use. I've used just about anything you can think of on exterior and it all eventually fails. This stuff holds up fantastic and I have yet to see it fail or even shows signs of deterioration, popping, cracking, nothing.

As was already said, get as much rot out as you can and replace with wood whenever possible. I also use the above epoxy as a glue for patches.
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Old 04-11-2018, 06:08 PM   #7
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Re: Exterior Epoxy


Abatron is expensive for relatively small amounts but very good. Many pros use Bondo and it does fine too.
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Old 04-11-2018, 10:36 PM   #8
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Re: Exterior Epoxy


Search West Systems Epoxy. Use either The 105 or G Flex with 410 flaring additive. Easy to sand (easier than Bondo). I’ve used tons of this stuff, it works really well. They have great tech help so you can call them for info.

https://www.westsystem.com
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Old 04-12-2018, 04:18 AM   #9
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Re: Exterior Epoxy


Ayuh,...... Epoxy is a poor choice, as it's not UV tolerant,....

Bondo, based on polyester resin isn't as strong, but takes UV light better, longer,.....
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Old 04-12-2018, 05:28 AM   #10
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Re: Exterior Epoxy


It’s being painted so it doesn’t matter. Most epoxy applications are probably exterior; boats and surfboards, being two examples.
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Old 04-12-2018, 11:31 AM   #11
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Re: Exterior Epoxy


Funny, in the world of auto body, Bondo is well known as the worst polyester filler on the market. It might be one of the first, but it is far from the best.

Also most polyester fillers (including Bondo) contain talc, which loves to absorb water. To an extent putting Bondo on wood is like filling it with a sponge. Holding moisture against wood, IMHO is never a good idea as it can and will (I've seen it first hand) cause more rot.
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Old 04-12-2018, 04:23 PM   #12
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Re: Exterior Epoxy


Ayuh,..... So long as painted, I completely agree,.....

I mix my own putties, 'n fillers with various ground glass, 'n cabosil,.....
As well as other additives per application needs,...
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