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Delaminating a bad glue up without destroying the project using a heat gun.

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Blog entry by Blackie_ posted 06-08-2013 02:08 AM 2041 reads 0 times favorited 10 comments Add to Favorites Watch

I am going to show you all a video I made on how to delaminate a bad glue up without destroying the project using a heat gun and also without having to make any cuts, this method will work on any joint and it doesn’t matter how long the joint has cured, the glue that I used in this video was Titebond II.

How I figured this out, I had a bad clamp on a warped project and wasn’t sure how I was going to fix it thus I was just going to leave it and make it work, I sat the project down, walked away from it and it was that very next morning that it came to me to use heat, I had remembered reading how to remove glue from bar clamps so I knew it had to work and sure enough it did allowing me to fix the problem, the photos below show the project I was working on at the time.

Link for the heat gun.

In these photos below I am showing you where I was able to fix a couple bad glue ups that went unnoticed when clamping once the glue had dried for a good 18 hour period I had removed the ratchet straps along with clamps to find that on the bottom of the box in each corner I had a warped face plate that stuck out 1/4” on one side and an 1/8” on the other side by using the heat gun and small bar clamps strategically placed up along where the face plate was not up against the inner core I heated the glue joints up and gradually and slowly cranked down on the clamps as the glue turned loose from the heat it closed the gaps and made the faceplate up tight against the inner core of the box where it was re-glued.

-- Randy - If I'm not on LJ's then I'm making Saw Dust. Please feel free to visit my store location at http://www.facebook.com/randy.blackstock.custom.wood.designs



10 comments so far

View Dusty56's profile

Dusty56

11684 posts in 2433 days


#1 posted 06-08-2013 04:07 AM

Thank you for this tip and video , Randy : )

-- I'm absolutely positive that I couldn't be more uncertain!

View exelectrician's profile

exelectrician

1743 posts in 1172 days


#2 posted 06-08-2013 04:34 AM

Thank you for the tip, I wish I knew about this last year.

-- Love thy neighbour as thyself

View Sodabowski's profile

Sodabowski

2081 posts in 1578 days


#3 posted 06-08-2013 08:19 AM

Now that’s a useful trick. Not sure it would work with contact cement but I will definitely try to check out if it also does.

-- Holy scrap Barkman!

View Roger's profile

Roger

15261 posts in 1549 days


#4 posted 06-08-2013 12:09 PM

Good to know. Always learnin somethin on this site.

-- Roger from KY. Work/Play/Travel Safe. Kentuk55@bellsouth.net

View abie's profile

abie

612 posts in 2516 days


#5 posted 06-08-2013 02:53 PM

Same thing if..

you use Titebond III and heat it in the Microwave.

-- Bruce. a mind is like a book it is only useful when open.

View Handtooler's profile

Handtooler

1124 posts in 877 days


#6 posted 06-08-2013 08:41 PM

Blackie, Supre advise. Many heat guns are rated at about 4500 degrees. I didn’t witness any scorching of the alder in your video, and the heat gun link mentioned wattage but not temperture. Do you have any idea as to how hot you might apply without scorching are maring most normal projects woods?

-- Russell Pitner Hixson, TN 37343 bassboy40@msn.com

View Blackie_'s profile

Blackie_

3638 posts in 1257 days


#7 posted 06-08-2013 09:29 PM

Hi Russell

On the very bottom of that link to the heat gun in comments it says nozzle can reach up to 400 degrees.

-- Randy - If I'm not on LJ's then I'm making Saw Dust. Please feel free to visit my store location at http://www.facebook.com/randy.blackstock.custom.wood.designs

View gfadvm's profile

gfadvm

11484 posts in 1435 days


#8 posted 06-09-2013 12:49 AM

Sodabowski, I have used a heat gun to “unglue” Formica that was glued with contact cement. Works well. My heat gun gets a LOT hotter than the one Randy posted so can char things if you’re not careful (but Formica can take a lot of heat).

-- " I'll try to be nicer, if you'll try to be smarter" gfadvm

View Sodabowski's profile

Sodabowski

2081 posts in 1578 days


#9 posted 06-09-2013 09:00 AM

Okay so it works too. Not sure this would do with veneer if you heat that much (until I get my hands onto some decent and fairly priced hide glue the only thing I’ve got in my arsenal to glue veneer without it warping is contact cement). Thanks for the tip mate :)

-- Holy scrap Barkman!

View gearupflapsup's profile

gearupflapsup

6 posts in 675 days


#10 posted 06-09-2013 12:30 PM

Thanks for the great tip!

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