Page 1 of 2 12 LastLast
Results 1 to 10 of 11

Thread: how to unglue something

  1. #1
    Join Date
    Sep 2007
    Location
    Central (upstate) NY
    Posts
    1,457

    how to unglue something

    After realizing I had cut the top of my paperback organizer too short by neglecting to add width for the rabbet it was going to sit in I cut a new top from some free pine ply offcuts, figuring that very few people will see the top. I was also kind of irritated at myself and did not want / could afford to buy another sheet of birch plywood to correct my error. The free wood has a little bow to it that I was not able to put enough force on to unbow it during assembly.

    I would now like to remove this and do things right - maybe I'll use up the rest of the Lowes gift card I received for winter holidays on the birch ply. Maybe I'll mill some solid maple I have in back. Maybe I'll do something else, but I don't like the bowed plywood - it is interfering with my thoughts to go forward with this project.

    The plywood in question is screwed and glued in place. I think I used Titebond 1. After double checking that I have, in fact, removed all of the screws what is the best way to make the glue fail so I can remove this plywood piece and start over?

    Thanks!

  2. #2
    Join Date
    Jul 2008
    Location
    Alexandria, Virginia
    Posts
    1,071
    Check around the forum until someone else answers, but I think Ned used heat (heating gun) some time ago.



  3. #3
    Join Date
    Feb 2007
    Location
    North West Indiana
    Posts
    6,097
    Don't know the length, but a long, long sawzall blade? Run it across the saw using the dado blade?
    Jon

    God and family, the rest is icing on the cake. I'm so far behind, I think I'm in first place!

    Host of the 2015 FAMILY WOODWORKING GATHERING

  4. #4
    Join Date
    Dec 2006
    Location
    RETIRED(!) in Austintown, Ohio
    Posts
    5,317
    Mark,
    A heat gun will soften the glue, but you've gotta be very careful not to burn the wood in the process. The heat will also burn any finish that's on it.

    Try using full strength white vinegar. Warm it a bit, and drizzle it into the joint, a little bit at a time. It'll soften the glue, and allow disassembly, but will leave a gummy glue residut that you'll have to scrape off. Then, you'll need to neutralize the vinegar with a little baking soda dissolved in water so that you can re-glue the joint.

    Messy, and time consuming, but it works.

    Woodcraft used to sell (maybe still does) a product with a name something like "D-Glu-It" that was (is) basically a gelled vinegar. I used it several years ago, but actually found the straight vinegar to work better. YMMV.
    Jim D.
    Adapt, Improvise, Overcome!

  5. #5
    Join Date
    Apr 2007
    Location
    No, not all of SoCal is Los Angeles!
    Posts
    9,076
    Heat and if possible, a little steam for PVA. Harbor Freight heat gun - $10. Steam Iron with a "burst-o-steam" button(?). Take your time and if you pry, try to use something that has a nice wide face. A screwdriver will most likely damage the keeper piece you are levering against. Something like these (doesn't have to be these) would work. Any friends do body work? They have plastic wedges and pry-goodies.
    Any sufficiently advanced technology is indistinguishable from magic.
    - Arthur C. Clarke

  6. #6
    Join Date
    Nov 2008
    Location
    outside of Toronto, Ont
    Posts
    182
    One possibility is the cut the bowed plywood and then re-cut the rabbet.

    It might be an excuse to buy one of the lower cost oscillating tools. I'm in the process of buying a Rockwell Sonicrafter myself.

  7. #7
    Join Date
    Dec 2008
    Location
    falcon heights, minnesota
    Posts
    5,605
    i had run into a similar problem myself a while ago. somehow, my mortising machine cut my needed mortises off by just a tad on some frames i was making. i had a brilliant idea about how to fix, but not how to seperate the parts that were glued together. just for the fun of it, i started tapping one of the bases with the persuader (a large mallet turned from a 4x4 of hard maple), and after a few light taps, everything came apart. titebond will hold good on normal stresses, but i think will give way on shear loads. either way, i solved the problem, remortised, and obscured the error with round felt pads.

    dan
    benedictione omnes bene

    www.burroviejowoodworking.com

    check out my etsy store, buroviejowoodworking

  8. #8
    Back in my classroom days I would dribble Titebond glue on my pants and shirts much to the displeasure of SWMBO when I got home, She would often rescue me (If I fessed up and told her) by soaking the damaged goods in White Vinegar. As was previously stated by someone who had also been there and done that

    I would use some Vinegar and some heat but not too much of the steam as plywood has a tendency to delaminate under steam treatment.

    Soften with the Vinegar and do the wiggle and see if it won't let go.

    Please report back with the results.

  9. #9
    Join Date
    Nov 2006
    Location
    Mountain Home, Arkansas
    Posts
    11,825
    I come unglued often whenever my wife starts screaming at me.
    You might want to try yelling at it.

    Sorry, couldn't resist.

  10. #10
    Join Date
    Feb 2007
    Location
    North West Indiana
    Posts
    6,097
    GOOD ONE FRANK!!!!!!!!!
    Jon

    God and family, the rest is icing on the cake. I'm so far behind, I think I'm in first place!

    Host of the 2015 FAMILY WOODWORKING GATHERING

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •