What is the best way to seal MDF for outdoor signage use?
[OP]
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What is the best way to seal MDF for outdoor signage use?
Member
John, it's not good practice to use MDF for exterior signage, Extira is the way to go.Originally Posted by John Johnson 2
http://www.extira.com/pageBuild.asp?...=B_signmaker_e
Neal
Friend of the Creek
MDF is not practical for outdoor use. You could bury it in casting resin but I wouldn't guarantee that either.
Ray Mighells Killbuck NY
Nice Wood For Laser
http://www.sawmillcreek.org/friends.php?id=155
Friend of The Creek
West System epoxy (as used for wooden boats) will make MDF last outdoors for years and years.
The epoxy is really expensive for this sort of use - better to find a more water resistant material to start with.
Member
Best way to seal it - get exterior grade MDF. West is not suitable alone on regular MDF, the binders will fail, it will go from 3/4" to 2" thick in one season.
Grothouse Lumber Company
Andi Stratus Pro, ILS12.150, Solidworks 2012, AutoCad 2012, MasterCam X6, Coreldraw X6
Moderator
MDO is a much better choice for outdoors. MDF is cheap but not meant for outdoors.
Sammamish, WA
Epilog Legend 24TT 45W, had a sign business for 17 years, now just doing laser work on the side.
"One only needs two tools in life: WD-40 to make things go, and duct tape to make them stop." G. Weilacher
"The handyman's secret weapon - Duct Tape" R. Green
Member
Marine Epoxy/varnish would seal it up. Although like others have stated MDF. I have good success with MDO (medium density overlay) it is impregnated with tons of resin to resist the exterior elements.
Mark Conde
Fishers, IN
Epilog 30 Watt (wished I went bigger)
FULLY equipped woodworking shop
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