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Sealing MDF


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pts760 
Copper - Posts: 403
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Joined: December 11, 2009
Location: United States
Posted: March 12, 2016 at 10:01 PM / IP Logged Link to Post Post Reply Quote pts760
I'm building a enclosure with mdf and fleece to be fiberglassed. I plan on prepping everything in order to finish with paint. I know that mdf sucks moisture in like a sponge so I was wondering how people are sealing mdf to make it paintable so I don't have to go through a trial & error process.
I drink current, eat ohms, and bleed voltage
tonanzith 
Gold - Posts: 583
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Joined: July 18, 2008
Location: Washington, United States
Posted: March 13, 2016 at 3:47 PM / IP Logged Link to Post Post Reply Quote tonanzith
primer primer primer. or you could always glass over the mdf but i have always done heavy primer and a light sanding before painting. unless its for a boat then i always glass on top of using marine grade mdf.
Gary Sather
digdug18 
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Joined: September 25, 2006
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Posted: April 04, 2016 at 12:19 PM / IP Logged Link to Post Post Reply Quote digdug18
Or use marine grade plywood instead. Though it depends on the circumstance(for yourself or a customer, what you're building, pressure involved, space, etc.)
pts760 
Copper - Posts: 403
Copper spacespace
Joined: December 11, 2009
Location: United States
Posted: April 04, 2016 at 9:41 PM / IP Logged Link to Post Post Reply Quote pts760
*Update* I picked up some oil based rustoleum primer, applied it, and it took paint like a charm. Would never have thought to use a oil based primer prior to this project but it makes perfect sense now. I kind of feel like a idiot for not putting 2 & 2 together before.
I drink current, eat ohms, and bleed voltage

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