This is topic MDF Board ? in forum Old Archives at The Letterville BullBoard.


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Posted by Ken Colwell (Member # 249) on :
 
Anyone out there know how to cover MDF board for exterior use? Would a good primer with maybe one-shot work?

Any help would be great.
Thanks
Ken

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Ken Colwell
 

Posted by Si Allen (Member # 420) on :
 
A large roof!!! MDF does not hold up well as an exterior substrate!

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Si Allen #562
La Mirada, CA. USA
(714) 521-4810
ICQ # 330407
"SignPainters do It with Longer Strokes!"

Brushasaurus on Chat

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Posted by Mike Pipes (Member # 1573) on :
 
Seal it up with a polyurethane wood finish.

There's a brand name of Deft (deft-thane) as well as other, available at home supply stores.

It shoots from a spray can, and is the best way to seal up MDF and woods before painting. It needs to dry for quite a while before being exposed to moisture however.

I don't know how it will hold up under full exposure to the elements however, I've only used MDF in automotive interiors.

The clear polyurethane wood finish does hold up quite well though. My dad built some oak furniture and used the clear on the wood. 10 years of water rings from cold drinks and it still holds up.

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Mike Pipes
Digital Illusion Custom Graphics
Lake Havasu City, AZ
http://www.stickerpimp.com


 

Posted by John Byrd (Member # 825) on :
 
Absolutely positively no way to make it work.

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John Byrd
Ball Ground
Georgia
letrhed1@tds.net
so happy I gotta sit on both my hands to keep from wavin' at everybody!
 

Posted by Dennis Veenema (Member # 833) on :
 
Forget about mdf unless you want to do the sign over...and over...and over...

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Dennis Veenema
The Sign Shop
Dresden, Ont.
"We Sign Everything"


 

Posted by Jerry Mathel (Member # 526) on :
 
MDF (Medex), is made about 30 miles from my shop. When they came out with that stuff, they really touted it as a sign material, and a lot of shops went for it. I don't know of a single incident where it was used outside that didn't end up in disaster. Don't even consider it for exterior use.

Jerry Mathel
Jerry Mathel Signs
Grants Pass, Oregon
signs@grantspass.com

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Posted by Suelynn Sedor (Member # 442) on :
 
You guys need to get ahold of Pat Welter from Masterhand Signs in Unity, Sask. He uses Medex all the time, with great results.

As I understand it, Medex is a type of MDF, but has been impregnated with a resin material that stops the absorbtion of water. It isn't the same as the MDF that you buy at the lumberyard. Pat does great work, and has beautiful medex signs that have been around for years.

I hope he doesn't mind me posting his email address: pr.welter@sk.sympatico.ca

Sue

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"It is never too late to be what you might have been." -George Eliot

Suelynn Sedor
Sedor Signs
Carnduff, Sk Canada

 



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