Vacuuming glue into a crack - Router Forums
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post #1 of 23 (permalink) Old 02-06-2018, 08:52 AM Thread Starter User
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Default Vacuuming glue into a crack

Another one of those "why didn't I think of that"
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post #2 of 23 (permalink) Old 02-06-2018, 09:19 AM
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First time I used this technique was sucking in Capt Tolley's hairline crack sealant for my boat portlights (defying gravity)...and again to reinforce my propeller strut with epoxy (again, an anti-gravity application)...

It really works great, if you manage the amount of suction. Too much and all the glue is gone...or it doesn't spread properly past the inbound opening. Use a suction break to control the suction.

It is particularly useful for the times when you would otherwise need to completely lift the offending grain to get glue in - edge face repairs, for example.

I can attest to the technique with a whole bunch of other examples...sucking in JB Weld, loose dowels/tenons when you can't take them apart, or anytime you want atmospheric pressure to be your friend.

I have small nozzles and hoses for "targeted suction" when the vac hose is just too big...


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post #3 of 23 (permalink) Old 02-06-2018, 09:58 AM
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Great idea! I've used compressed air to force it into a crack/hole, but this is a really helpful idea.
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post #4 of 23 (permalink) Old 02-06-2018, 10:46 AM
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I've used vacuum and compressed air to get glue into cracks many times - both methods work pretty good.



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post #5 of 23 (permalink) Old 02-06-2018, 12:29 PM
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I generally use a syringe with a small tip to inject glue into cracks. But this looks like a good idea. I have an antique set of tables (from my childhood) with a crack. I've hesitated to glue it before because it's very small, but this should do the trick. Thanks.
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post #6 of 23 (permalink) Old 02-07-2018, 07:06 AM
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I am going today to look at a table with a crack to repair. I will keep this solution in mind.


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post #7 of 23 (permalink) Old 02-07-2018, 07:14 AM
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Thanks, Harry. This is new to me but I have led a sheltered life.
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post #8 of 23 (permalink) Old 02-07-2018, 07:38 AM
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What a great idea! I've been using a strip of playing card to work glue down into a crack. But this is a much more elegant solution.
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post #9 of 23 (permalink) Old 02-07-2018, 09:46 AM
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I have used the vacuum method many times... works great! another way of forcing glue into a crack is to puddle the glue along the crack, then with you finger, rub the glue into the crack at an angle across the crack to pump it into the crack...adding more glue and rubbing until it show up on the other side (kinda like forcing grout when doing tile).
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post #10 of 23 (permalink) Old 02-07-2018, 01:51 PM
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Interesting. Something new for me. I have glued cracks successfully in the past by thinning my glue a bit and it would seep into the crack.

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