GuitarStoolMaker Posted October 26, 2008 Report Share Posted October 26, 2008 (edited) I guess this is the same fix for a guitar as it would be for a mandolin. I have a mandolin which top board cracked at the glue joint. How do I fix this? Do I fill it? link link One picture per post please. except in the "in Progress and finished section". Please take time to check out the forum rules in the Announcements section . BTW welcome to PG. Mk Edited October 27, 2008 by MiKro Quote Link to comment Share on other sites More sharing options...
Acousticraft Posted October 27, 2008 Report Share Posted October 27, 2008 I would seal the crack inside the sound board with masking tape and use clear slow cure epoxy glue to fill the crack. It will slowly seep down and fill the crack so it needs to be sealed so it doesn't leak out inside. Set the instrument up so the sound board sits level. You would also want to mask either side of the crack on the outside so you dont get epoxy on the finish. Use a tooth pick to drip the epoxy into the crack until filled level. The trick is then to remove the tape on the outside and inside just as the epoxy starts to set up so the tape will pull away cleanly and not be bonded to the glue. Quote Link to comment Share on other sites More sharing options...
GuitarStoolMaker Posted October 27, 2008 Author Report Share Posted October 27, 2008 GReat idea! thanks! do you think the sound will be affected? Quote Link to comment Share on other sites More sharing options...
joshvegas Posted October 27, 2008 Report Share Posted October 27, 2008 aslong as its stable I can't imagine it will affect the sound in anyway you'd notice. You get some acoustic guitars with way more damage than that afterall nice mandolin by the way Quote Link to comment Share on other sites More sharing options...
GuitarStoolMaker Posted October 27, 2008 Author Report Share Posted October 27, 2008 I mixed some epoxy and masked off each side of the crack and 4 hours later I was jamming again thanks! Quote Link to comment Share on other sites More sharing options...
bergeros Posted October 29, 2008 Report Share Posted October 29, 2008 I use Super glue at the top side (as thin as possible) make a smear of epoxy from inside (very thin layer of fast cure epoxy), and within half an hour you can jam. Quote Link to comment Share on other sites More sharing options...
zazou Posted November 11, 2008 Report Share Posted November 11, 2008 I guess this is the same fix for a guitar as it would be for a mandolin. I have a mandolin which top board cracked at the glue joint. How do I fix this? Do I fill it? link link One picture per post please. except in the "in Progress and finished section". Please take time to check out the forum rules in the Announcements section . BTW welcome to PG. Mkthis mondolin is build with a solid top wood [sprus].the couse for the split at the center joint is the shrinking of the wood. remember,this is not a crack.aiging is a hardening [shrinking ] of the mikrocels of the wood.when this hapens the wood loosses its flexibility and cracks ezy when expoused to chenging umidity levels.the proper way to fix this mandlin is by insrting strip of aiged sprus wood.this is a job for expert luthier. Quote Link to comment Share on other sites More sharing options...
Woodenspoke Posted November 11, 2008 Report Share Posted November 11, 2008 I would seal the crack inside the sound board with masking tape and use clear slow cure epoxy glue to fill the crack. It will slowly seep down and fill the crack so it needs to be sealed so it doesn't leak out inside. Set the instrument up so the sound board sits level. You would also want to mask either side of the crack on the outside so you dont get epoxy on the finish. Use a tooth pick to drip the epoxy into the crack until filled level. The trick is then to remove the tape on the outside and inside just as the epoxy starts to set up so the tape will pull away cleanly and not be bonded to the glue. I wonder if adding a very small cleat may help with future expansion problems?? Quote Link to comment Share on other sites More sharing options...
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