Question about glue vs epoxy for my build. - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 13 Old 11-07-2019, 02:40 PM - Thread Starter
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Question about glue vs epoxy for my build.

One of the benefits of a being career firefighter is someone always has or does what I need. Case in point, a buddy does finish woodworking and has all the tools necessary to cut my wood for my dual Fi Car HT-3 sealed build. He suggested epoxy instead of wood glue, thinking it would be stronger at holding everything together.



Good? Bad? Dumb?
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post #2 of 13 Old 11-07-2019, 02:54 PM
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Quote:
Originally Posted by ratm View Post
One of the benefits of a being career firefighter is someone always has or does what I need. Case in point, a buddy does finish woodworking and has all the tools necessary to cut my wood for my dual Fi Car HT-3 sealed build. He suggested epoxy instead of wood glue, thinking it would be stronger at holding everything together.



Good? Bad? Dumb?


Most good quality wood glues are stronger than the wood itself. Titebond III is a favorite around here, good adhesion and longer work time.

Loctite PL3x construction adhesive is a popular wood glue alternative here. It has much longer work times, doesn’t run down panels, and expands to fill and seal small gaps. It has also been tested to be stronger than the wood. It requires much longer cure time before unclamping and handling than wood glue.

I prefer wood glue for simple boxes, and PL for more complex builds with possible slight fitment inconsistencies.

Chris


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post #3 of 13 Old 11-07-2019, 03:00 PM
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IAFF Local 2 member here.

Unless your FF friend is going to do the epoxying for you or show you how to use it I would stick to wood glue. Its just easy to work with and plenty strong. The only epoxies I have ever used are not very forgiving.
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post #4 of 13 Old 11-07-2019, 04:18 PM
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Another vote for wood glue. Epoxy may have higher tensile strength but I'm not sure it has a better bond strength to wood substrate. Also, wood glue is already stronger than the wood. More is not needed.
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post #5 of 13 Old 11-07-2019, 05:09 PM
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Quote:
Originally Posted by Bigus View Post
Another vote for wood glue. Epoxy may have higher tensile strength but I'm not sure it has a better bond strength to wood substrate. Also, wood glue is already stronger than the wood. More is not needed.
Another vote for wood glue..... because you can actually get off your hands..... don't get me wrong, PL3 is AWESOME for some things, I use it myself ..... BUT you WILL wear it for at least 3 days or so....


IF you have a brad nailer, then wood glue is the way to go.... tack and move on...



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post #6 of 13 Old 11-07-2019, 05:13 PM - Thread Starter
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Wood glue it is!



Thanks!
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post #7 of 13 Old 11-08-2019, 07:03 AM
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My concern with epoxy is how well it seeps into the wood grain. That's why wood glue is so strong, it wicks into the wood then makes a super strong bond.

Good choice.

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post #8 of 13 Old 11-08-2019, 07:58 AM
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Wood glue and don't look back..take 2 small pieces of wood. Glue and clamp. Wait 24 hours....try to get them apart

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post #9 of 13 Old 11-08-2019, 10:33 AM
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Originally Posted by jevchance View Post
My concern with epoxy is how well it seeps into the wood grain.

Just as a data point, epoxy absorbs very well into wood.

I use it, or polyester resin, to paint around joints to keep the seams from eventually showing.

I agree with everyone else about wood glue being adequate.

I will say though that if a lot of pieces are involved, I find PL more forgiving because the joints can be adjusted for quite some time.

I've had joints come out bad and require a lot of fixing because the wood glue has set too fast and not given me time to get all of the pieces in position.
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post #10 of 13 Old 11-08-2019, 02:53 PM
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To piggy back on this comment, the wood will break before the glue. I have seen it first hand. Tried to pull 2 pieces of wood apart on one of my home projects and the wood splintered and the glue remained. I had one of those told ya so moments.
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post #11 of 13 Old 11-08-2019, 07:27 PM
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Quote:
Originally Posted by noah katz View Post
Just as a data point, epoxy absorbs very well into wood.



I use it, or polyester resin, to paint around joints to keep the seams from eventually showing.



I agree with everyone else about wood glue being adequate.



I will say though that if a lot of pieces are involved, I find PL more forgiving because the joints can be adjusted for quite some time.



I've had joints come out bad and require a lot of fixing because the wood glue has set too fast and not given me time to get all of the pieces in position.
Regarding seams. I have always used dry-wall mud at the end grain. Lots of primer and then paint. Never an issue. Easy to do. And, it does last.

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post #12 of 13 Old 11-08-2019, 07:37 PM
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Originally Posted by ccssid123 View Post
Regarding seams. I have always used dry-wall mud at the end grain. Lots of primer and then paint. Never an issue. Easy to do. And, it does last.
Yes, this, and easier to smear into those seams than wood filler. Just be sure to let it dry (takes longer than wood filler, being water based).
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post #13 of 13 Old 11-08-2019, 09:34 PM
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Quote:
Originally Posted by smcmillan2 View Post
Yes, this, and easier to smear into those seams than wood filler. Just be sure to let it dry (takes longer than wood filler, being water based).


Thats why I prefer to use bondo. Frustratingly short work time, so plan for small batches. Sandable in an hour or so though.

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