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Thread: What is Going on Here? What to do?

  1. #1
    Join Date
    Oct 2014
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    Little River, California
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    Default What is Going on Here? What to do?

    I'm not a very experienced builder, but I pride myself on making joint seams disappear. I can make them absolutely invisible. Then today I was sanding out a top plate joint and it would not disappear. It was on some new Sitka spruce from a new source and some nice AAA stuff.

    What seems to have happened is that the glue (Titebond) seems to have seeped into the wood enough to discolor it along the joint. This is unacceptable to me and basically is some nice spruce ruined. Other than cut the plates apart and start over or use an opaque finish, I am at a loss of what to do. But I'm a bit puzzled why this happened. I've done a bunch of spruce tops and never seen this problem. Second picture is some strong back light.

    DSCN7441.jpg DSCN7439.jpg

  2. #2
    Join Date
    Aug 2012
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    South Euclid, OH USA (Cleveland)
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    513

    Default

    Hmmm.... I have limited experience with Sitka, but titebond redcap is my go-to glue. I wonder if others have experienced this (or similar) and since headed it off with a whisper of shellac? I'm curious to read the replies.
    Tobin Crooks

  3. #3
    Join Date
    Feb 2013
    Location
    Petaluma, CA
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    597

    Default

    Surely it is salvageable in some other project. If not let me know.

  4. #4
    Join Date
    May 2010
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    UK
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    Default

    Must be something reacting with the glue. Try shooting the outer edge and brushing on some water, then an area with glue, see if there's a colour change.
    I've never had that happen with HHG but it may well be that it contains something that reacts to water based glues.

  5. #5
    Join Date
    May 2011
    Location
    So. Oregon
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    1,684

    Default

    I had the same thing happen with Sitka and original Titebond, but only once out of dozens of Sitka tops. Threw the top away. Another top that was glued up in the same way and from the same board was OK. Go figure. I have other sets resawn from the same board with a note on them to try a different glue next time.

  6. #6
    Join Date
    Apr 2016
    Location
    Indiana
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    Default

    Ouch, cutting it apart, shooting it again, and sparsely re-gluing is the only way to salvage it. Then, hope the glue doesn't seep across the seam again. Redcap tite bond or hide glue if HHG does it again.
    Last edited by Rrgramps; 12-12-2016 at 05:00 AM.
    Trent

  7. #7
    Join Date
    Dec 2011
    Location
    Grand Junction, Colorado
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    2,728

    Default

    It isn't the glue reacting to teh wood.
    its one (or all of the following trhee things)

    1- Bad/gappy glue joint (i doubt it) and this is obvious to look at.
    2- Sometimes two dark winter grain lines can merge/be very close and it looks like one dark line.
    or
    3- Sometimes the wood has discolourisation in that area.

    Solution is the same for all 3 things-
    1- Cut it in half again,
    2- Chop out the discoloured spruce,
    3- Re glue
    Last edited by Beau Hannam Ukuleles; 12-12-2016 at 09:12 AM.

  8. #8
    Join Date
    Feb 2012
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    Bell Buckle, TN 37020
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    189

    Default

    Cut it out!

    Don't use TiteBond glue for these kinds of joints........ use HHG, RooGlue Clear, LMI glue, or other........Weep is usually very noticeable in rosette area's.

  9. #9
    Join Date
    Oct 2014
    Location
    Little River, California
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    Default

    The glue was Titebond original red cap. It was rather an old bottle. What I think may have happened is this: The plates come from their humidity controlled environment at the vendor. Arrive at my house in a downpour. Everything is like a swamp at the moment. I take them out to the shop. Humidity 99%. Shoot the edges exposing all that fresh dry wood to high humidity. Immediately absorbs moisture. Apply glue and the titebond just wicked and followed all that moisture into the wood. That is my current theory anyway since I've never had Titebond weep into surrounding wood like that... Will cut out the area and re-glue. Not really that big a deal just a puzzler.

  10. #10
    Join Date
    May 2010
    Location
    UK
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