View Full Version : Sealing MDF
John Johnson 2
09-30-2011, 11:29 AM
What is the best way to seal MDF for outdoor signage use?
Neal Schlee
09-30-2011, 12:23 PM
What is the best way to seal MDF for outdoor signage use?
John, it's not good practice to use MDF for exterior signage, Extira is the way to go.
http://www.extira.com/pageBuild.asp?PageID=B_signmaker_e
Neal
Ray Mighells
09-30-2011, 12:29 PM
MDF is not practical for outdoor use. You could bury it in casting resin but I wouldn't guarantee that either.
Michael Hunter
10-01-2011, 5:56 PM
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.
Paul Grothouse
10-01-2011, 11:14 PM
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.
Joe Pelonio
10-02-2011, 1:40 PM
MDO is a much better choice for outdoors. MDF is cheap but not meant for outdoors.
Mark Conde
10-02-2011, 7:51 PM
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.
Powered by vBulletin® Version 4.2.5 Copyright © 2024 vBulletin Solutions Inc. All rights reserved.