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What are folks using nowadays to seal the edges of MDO board? Normally I would use edge capping for a rectangular sign but I'm cutting this one in a shape so that won't work. I tried sealing one with wood putty back in the spring but it became dried and crumbly and crystallized in the heat and caused the primer and paint to flake off.
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Pete, some use caulk, i have never had luck with that over the years, So now I use TiteBond II Glue, 3 coats over raw MDO after filling the voids with wood filler. Haven't had a failure yet.
-------------------- Bob Rochon Creative Signworks Millbury, MA 508-865-7330
"Life is Like an Echo, what you put out, comes back to you." Posts: 5149 | From: Millbury, Mass. U.S. | Registered: Nov 1998
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Years ago, bondo (generic auto body filler) used talc as a filler, and was prone to absorb moisture. I started using the green stuff, one brand is called everglass, Marglass, which uses ground or finely chopped fiberglass for a filler. It's good for patching boats so it works for MDO edges. Been using it for a long time.
-------------------- Ron Costa Sign and Design 28 Ingerson Road Jefferson, NH 0358 Posts: 620 | From: New Hampshire | Registered: Oct 2002
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There are many brands of "bondo"...all pretty much the same. I'll bet, truth be told, many are made by one company, and marketed under several different names. FiberglasEvercoat is one of the big manufacturers.
I usually round off the edges of the panel, fill in voids with an acrylic caulk; then paint. Prime back, coat edges. Prime front, coat edges. Prime back, coat edges, Coat out front twice, hit edges.
That gives about 4 coats (or more)of paint on the edges. I haven't had any problems.
-------------------- Dale Feicke Grafix 714 East St. Mendenhall, MS 39114
"I can do all things through Christ, who strengthens me." Posts: 2963 | From: Mendenhall, MS | Registered: Apr 1999
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I did a couple of sandblasted cedar signs a few years back where as sort of an experiment I coated the raised letters with a couple coats of Titebond exterior wood glue. It gave a smooth surface, almost like doming but not that thick as a surface for gilding. They looked great for about two years, then the glue with the gold on it peeled completely off the wood. Fortunately one was my own and one was not out in the weather. That makes me not want to use Titebond as an edge sealer for MDO. Edit to say - it is NOT fortunate that the one not out in the weather peeled, too, just not as bad.
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Chuck, interesting results on your sandblasted sign. I've been using Tite-bond well over 5 years with no failures. It is the best edge sealer I have used in 17 years.
[ August 04, 2010, 09:32 PM: Message edited by: Bob Rochon ]
-------------------- Bob Rochon Creative Signworks Millbury, MA 508-865-7330
"Life is Like an Echo, what you put out, comes back to you." Posts: 5149 | From: Millbury, Mass. U.S. | Registered: Nov 1998
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