I've seen it mentioned several times in the past on this forum that a good use of outdated Titebond is to paint surfaces with a diluted mixture to prevent other glue from adhering to the surface. So I decided to give it a try when I started making a new jig for laminating solid linings. I did a test first to be sure I knew what I was doing.
I applied a diluted solution (approx. 2:1, TB:water) to a scrap piece & waited an hour or so to be sure it was dry. Then I spread non-diluted TB on a small block & pressed it onto the first piece; no clamps. After 30 min. or so I tried to pull the block off the test surface but could not. It took a surprising amount of force with a hammer to knock the block off. My conclusion was that I must've done something wrong: maybe the original diluted application needed to dry longer; perhaps multiple applications of the diluted solution were needed.
So I began a second test. To another scrap piece I applied 3 coats of the diluted TB solution, waiting for each coat to dry thoroughly before applying another coat. I set this aside for 2 days to insure thorough curing. Again I spread undiluted TB on a small block & pressed it onto the prepared surface & left it to dry for 30 min. or so. Once again it took a significant hammer blow to remove the block. When the block finally came off, It pulled up wood from the surface of the other piece. The block came up with the TB applied directly to it as well as the 3 diluted coats on the prepared surface & wood from the prepared surface.
Can any one shed any light on this situation? TB is not supposed to adhere (cohere?) to dried TB, but it seems that it did in this case.
-Earl
Bookmarks