Too much clamping pressure when using epoxies.

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Forum topic by pontic posted 02-13-2017 02:00 PM 626 views 0 times favorited 3 replies Add to Favorites Watch
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816 posts in 1578 days

02-13-2017 02:00 PM

Epoxies shrink significantly when setting. So do aliphatic glues like tight bond. the difference is that there is much less penetration into the wood surface with epoxies. The epoxies have a better standalone strength(better in shear and more flexible). So they are good for loose or open joints. Too much clamping pressure in these situations I think, will work against me. As the epoxy sets and shrinks it pulls more into the opening and away from the wood. I seem to have better results with little or no clamping pressure in these situations. Am I way off base or not?

-- Illigitimii non carburundum sum

3 replies so far

View a1Jim's profile


118153 posts in 4547 days

#1 posted 02-13-2017 02:37 PM

Hi Pontic
Actully Fine Woodworking did a test on different glues in different conditions with different woods, test included joinery that was too tight of joint, and too loose and they found Polyvinyl acetate outperformed even epoxies in every test.


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816 posts in 1578 days

#2 posted 02-13-2017 04:05 PM

So good ol’ tight bond wins again!

-- Illigitimii non carburundum sum

View SuperCubber's profile


1162 posts in 3254 days

#3 posted 02-13-2017 04:28 PM

Here are the results from the test Jim speaks of:

-- Joe | Spartanburg, SC | "To give anything less than your best is to sacrafice the gift." - Steve Prefontaine

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