Primer for MDF sheets - Paint Talk - Professional Painting Contractors Forum
CLICK HERE AND JOIN OUR COMMUNITY TODAY, IT'S FREE!
Go Back   Paint Talk - Professional Painting Contractors Forum > Painting Forum > General Painting Discussion

Like Tree9Likes
Reply
 
Thread Tools Display Modes
Old 07-15-2016, 09:56 AM   #1
Senior Member
 
Join Date: Feb 2015
Posts: 139
Rewards Points: 278
Thanks: 111
Thanked 29 Times in 22 Posts
View Jazz_Painter's Photo Album My Photos
Default Primer for MDF sheets

The GC I'm been working with for quite makes more and more his baseboards, door/window frame and trim from Sheets of MDF that he cuts to the right lenght and width. They say it's less expensive and gives a more modern look.

So far as standard procedure I've been using aqualock (which I use as my standard primer) and top coat with pearl latex as we do often here. If the budget allows it, I like to use advance as a top coat for a harder finish, the customers likes it a lot.

I was wandering if you guys would think of a better primer for sealing the mdf and helping with the top coat. So far my system works, but I'm always trying to improve. Also, the side from the mdf is super porous for obvious reasons.

Regards.
Jazz_Painter is offline   Reply With Quote

Warning: The topics covered on this site include activities in which there exists the potential for serious injury or death. PaintTalk.com DOES NOT guarantee the accuracy or completeness of any information contained on this site. Always use proper safety precaution and reference reliable outside sources before attempting any construction or remodeling task!

Sponsored Links
Advertisement
 
Old 07-15-2016, 01:09 PM   #2
Senior Member
 
Zoomer's Avatar
 
Join Date: Dec 2011
Posts: 1,162
Rewards Points: 526
Thanks: 181
Thanked 516 Times in 349 Posts
View Zoomer's Photo Album My Photos
Default

I would say you're getting in the way that you're approaching these paints and primers. I would also consider smart Prime when deciding on a very good primer for MDF. Make certain that if you are using Advanced to only give it one coat per day to allow for complete curing.
Zoomer is offline   Reply With Quote
The Following User Says Thank You to Zoomer For This Useful Post:
Jazz_Painter (07-16-2016)
Old 07-15-2016, 01:10 PM   #3
Senior Member
 
Zoomer's Avatar
 
Join Date: Dec 2011
Posts: 1,162
Rewards Points: 526
Thanks: 181
Thanked 516 Times in 349 Posts
View Zoomer's Photo Album My Photos
Default

Voice text typos. I would you say you are spot on in the way....
Jazz_Painter likes this.
Zoomer is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 07-15-2016, 07:14 PM   #4
Senior Member
 
TrueColors's Avatar
 
Join Date: Jul 2010
Posts: 424
Rewards Points: 160
Thanks: 35
Thanked 284 Times in 134 Posts
View TrueColors's Photo Album My Photos
Default

I use Aqua lock for mdf as well. Seems to be a good system that works for me.... I always say stick to what you know.


Sent from my iPhone using Tapatalk
TrueColors is offline   Reply With Quote
Old 07-15-2016, 08:52 PM   #5
Senior Member
 
Join Date: Aug 2013
Location: Chicago near north suburbs
Posts: 1,295
Rewards Points: 2,632
Thanks: 540
Thanked 323 Times in 248 Posts
View futtyos's Photo Album My Photos
Default

Quote:
Originally Posted by Jazz_Painter View Post
I was wandering if you guys would think of a better primer for sealing the mdf and helping with the top coat. So far my system works, but I'm always trying to improve. Also, the side from the mdf is super porous for obvious reasons.

Regards.
I read this article by Jack Pauhl some time ago regarding applying Gardz over MDF:

http://www.jackpauhl.com/brushing-md...-wet-yourself/

I was unfamiliar with painting over MDF until I did some. It sucked up the paint like a black hole! The next job I ran across MDF at, I decided to try the Gardz. I had to paint white MDF crown molding blood red, so I put 2 coats of Gardz on. It still took me 3 coats of the red to get a uniform finish, but it was a lot easier painting than without the Gardz.

I do not have enough experience with MDF to tell you if Gardz is better than other products, but you might give it a shot, at least on 10 or 20 feet of trim to see what happens.

futtyos
futtyos is offline   Reply With Quote
The Following 3 Users Say Thank You to futtyos For This Useful Post:
Jazz_Painter (07-16-2016), Lambrecht (07-15-2016), Wildbill7145 (07-17-2016)
Old 07-16-2016, 05:23 AM   #6
Senior Member
 
Join Date: Nov 2014
Location: Westwood, Ma
Posts: 688
Rewards Points: 100
Thanks: 1,634
Thanked 651 Times in 321 Posts
View PremierPaintingMa's Photo Album My Photos
Default

I use BM Enamel Underbody Primer(217) never failed me. Easy sanding, great for sealing the mdf, excellent for top coat finish, specially for Advance.

Dan.
PRC likes this.
PremierPaintingMa is offline   Reply With Quote
The Following 2 Users Say Thank You to PremierPaintingMa For This Useful Post:
AngieM (07-17-2016), Jazz_Painter (07-16-2016)
Old 07-16-2016, 09:10 AM   #7
Senior Member
 
Join Date: Feb 2015
Posts: 139
Rewards Points: 278
Thanks: 111
Thanked 29 Times in 22 Posts
View Jazz_Painter's Photo Album My Photos
Default

Quote:
Originally Posted by futtyos View Post
I read this article by Jack Pauhl some time ago regarding applying Gardz over MDF:

http://www.jackpauhl.com/brushing-md...-wet-yourself/

I was unfamiliar with painting over MDF until I did some. It sucked up the paint like a black hole! The next job I ran across MDF at, I decided to try the Gardz. I had to paint white MDF crown molding blood red, so I put 2 coats of Gardz on. It still took me 3 coats of the red to get a uniform finish, but it was a lot easier painting than without the Gardz.

I do not have enough experience with MDF to tell you if Gardz is better than other products, but you might give it a shot, at least on 10 or 20 feet of trim to see what happens.

futtyos
That's very interesting, thanks for posting it! That being said I'm talking about unprimed mdf sheets that are cut to frames and baseboards dimentions.
Jazz_Painter is offline   Reply With Quote
Old 07-16-2016, 12:34 PM   #8
Senior Member
 
straight_lines's Avatar
 
Join Date: Oct 2007
Location: Wilmington, N.C.
Posts: 7,822
Rewards Points: 1,574
Thanks: 5,686
Thanked 5,172 Times in 2,981 Posts
View straight_lines's Photo Album My Photos
Send a message via Yahoo to straight_lines
Default

Kem aqua plus surfacer.
Jazz_Painter likes this.
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



Primer makes everything better...
straight_lines is offline   Reply With Quote
Old 07-16-2016, 01:22 PM   #9
Junior Member
 
Join Date: May 2015
Posts: 4
Thanks: 2
Thanked 1 Time in 1 Post
View beaglepower's Photo Album My Photos
Default

The water based primers don't cause the mdf to swell up?


Sent from my iPhone using Tapatalk
beaglepower is offline   Reply With Quote
The Following User Says Thank You to beaglepower For This Useful Post:
lilpaintchic (07-17-2016)
Old 07-16-2016, 11:20 PM   #10
Senior Member
 
Join Date: Aug 2013
Location: Chicago near north suburbs
Posts: 1,295
Rewards Points: 2,632
Thanks: 540
Thanked 323 Times in 248 Posts
View futtyos's Photo Album My Photos
Default MDF soaking up water?

Quote:
Originally Posted by Jazz_Painter View Post
That's very interesting, thanks for posting it! That being said I'm talking about unprimed mdf sheets that are cut to frames and baseboards dimentions.
Jazz_Painter, you make an good point about the MDF being unprimed. I have only painted or Gardzed over primed MDF. From what I am reading, it is recommended to prime raw MDF with a non-water based primer so that the fibers do not swell and make sanding an impossibility. That being said, why does primed MDF suck water based primer or paint up like a black hole, but does not seem to swell the MDF? Maybe it does and I just am not seeing it properly?

futtyos
Jazz_Painter likes this.
futtyos is offline   Reply With Quote
Old 07-17-2016, 12:23 AM   #11
Senior Member
 
lilpaintchic's Avatar
 
Join Date: Jul 2014
Location: Blue Marble, Earth
Posts: 4,010
Rewards Points: 5,006
Thanks: 3,702
Thanked 1,897 Times in 1,217 Posts
View lilpaintchic's Photo Album My Photos
Default

I like oil.
lilpaintchic is offline   Reply With Quote
Old 07-17-2016, 01:59 AM   #12
Senior Member
 
lilpaintchic's Avatar
 
Join Date: Jul 2014
Location: Blue Marble, Earth
Posts: 4,010
Rewards Points: 5,006
Thanks: 3,702
Thanked 1,897 Times in 1,217 Posts
View lilpaintchic's Photo Album My Photos
Default

Quote:
Originally Posted by beaglepower View Post
The water based primers don't cause the mdf to swell up?


Sent from my iPhone using Tapatalk
They do tend to raise the grain higher and be more difficult to sand than oil for about the same price. Imo...
lilpaintchic is offline   Reply With Quote
Old 07-17-2016, 03:28 AM   #13
very senior member
 
chrisn's Avatar
 
Join Date: Jul 2007
Location: Hagerstown md
Posts: 9,846
Thanks: 3,621
Thanked 5,521 Times in 3,389 Posts
View chrisn's Photo Album My Photos
Default

Quote:
Originally Posted by lilpaintchic View Post
I like oil.
I like 10W-40 myself
dirtyjeep01 likes this.
__________________
It's PASTE, not glue
chrisn is offline   Reply With Quote
The Following User Says Thank You to chrisn For This Useful Post:
lilpaintchic (07-17-2016)
Old 07-17-2016, 09:37 AM   #14
Moderator
 
Wildbill7145's Avatar
 
Join Date: Apr 2014
Location: Canada
Posts: 6,058
Rewards Points: 5,394
Thanks: 3,941
Thanked 4,540 Times in 2,511 Posts
View Wildbill7145's Photo Album My Photos
Default

Quote:
Originally Posted by lilpaintchic View Post
They do tend to raise the grain higher and be more difficult to sand than oil for about the same price. Imo...
Grain in MDF? Never heard of that. I haven't had to deal with much MDF trim, but when I have I've used my go to primer Bull123 and I've never had a problem.

A few years ago though I did have to paint an entire house of MDF doors that were preprimed. What a nightmare. Sanded the primer, dusted for prep. These things sucked up the first coat in a way I'd never seen before. Paint literally dried to the touch in seconds. Fully loaded brush was empty pretty much as soon as it touched the surface. Second coat went far better, but man you had to be careful on the first.

Never seen anything like it before.
Jazz_Painter likes this.
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Wildbill7145 is offline   Reply With Quote
The Following User Says Thank You to Wildbill7145 For This Useful Post:
lilpaintchic (07-17-2016)
Old 07-17-2016, 12:00 PM   #15
Senior Member
 
lilpaintchic's Avatar
 
Join Date: Jul 2014
Location: Blue Marble, Earth
Posts: 4,010
Rewards Points: 5,006
Thanks: 3,702
Thanked 1,897 Times in 1,217 Posts
View lilpaintchic's Photo Album My Photos
Default

Did I mention I like oil? Mdf absorbs water like a thirsty sponge. You can use 123 or whatever but I get better results from coverstain. Or sometimes (like last week) a bomb can of kilz or 2 does the trick nicely. Brushing new mdf is a nightmare no matter what you're using though.. I just think oil sands out smoother and flows a bit better. To each their own...
And "raising the grain" is the best way I could express the effect of what water based products do to the surface of mdf. Its such a drag. (Pun intended) Especially unprimed. Check it out for yourself some time...
Jazz_Painter likes this.

Last edited by lilpaintchic; 07-17-2016 at 12:04 PM..
lilpaintchic is offline   Reply With Quote
The Following 3 Users Say Thank You to lilpaintchic For This Useful Post:
AngieM (07-17-2016), journeymanPainter (07-17-2016), loaded brush (07-18-2016)
Old 07-17-2016, 12:08 PM   #16
Senior Member
 
Join Date: Aug 2013
Location: Chicago near north suburbs
Posts: 1,295
Rewards Points: 2,632
Thanks: 540
Thanked 323 Times in 248 Posts
View futtyos's Photo Album My Photos
Default Fibers, not grain?

Quote:
Originally Posted by lilpaintchic View Post
Did I mention I like oil? Mdf absorbs water like a thirsty sponge. You can use 123 or whatever but I get better results from coverstain. Or sometimes (like last week) a bomb can of kilz or 2 does the trick nicely. Brushing new mdf is a nightmare no matter what you're using though.. I just think oil sands out smoother and flows a bit better. To each their own...
And "raising the grain" is the best way I could express the effect of what water based products do to the surface of mdf. Its such a drag. (Pun intended) Especially unprimed. Check it out for yourself some time...
How about saying that water based raises the fibers?

futtyos

P.S. I think I will try Coverstain next time I run into MDF, which I hope does not happen.
futtyos is offline   Reply With Quote
The Following User Says Thank You to futtyos For This Useful Post:
Wildbill7145 (07-17-2016)
Old 07-17-2016, 12:17 PM   #17
Moderator
 
Wildbill7145's Avatar
 
Join Date: Apr 2014
Location: Canada
Posts: 6,058
Rewards Points: 5,394
Thanks: 3,941
Thanked 4,540 Times in 2,511 Posts
View Wildbill7145's Photo Album My Photos
Default

One thing I've always hated about MDF trim is when the carpenters hit it with their 18g nailers and you get the bulge. Never happens with real wood.
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Wildbill7145 is offline   Reply With Quote
The Following 2 Users Say Thank You to Wildbill7145 For This Useful Post:
lilpaintchic (07-17-2016), loaded brush (07-18-2016)
Old 08-28-2016, 10:33 PM   #18
Senior Member
 
Join Date: Feb 2015
Posts: 139
Rewards Points: 278
Thanks: 111
Thanked 29 Times in 22 Posts
View Jazz_Painter's Photo Album My Photos
Default

Quote:
Originally Posted by lilpaintchic View Post
I like oil.
Do you find coverstain to do a better job at sealing the edge as well? Cause the edge is so unbelievably porous... that's where I feel the most pain painting, especially when I have to cut them.
Jazz_Painter is offline   Reply With Quote
Old 08-29-2016, 07:10 AM   #19
Senior Member
 
lilpaintchic's Avatar
 
Join Date: Jul 2014
Location: Blue Marble, Earth
Posts: 4,010
Rewards Points: 5,006
Thanks: 3,702
Thanked 1,897 Times in 1,217 Posts
View lilpaintchic's Photo Album My Photos
Default

Quote:
Originally Posted by Jazz_Painter View Post
Do you find coverstain to do a better job at sealing the edge as well? Cause the edge is so unbelievably porous... that's where I feel the most pain painting, especially when I have to cut them.
Yes. Depending on what's going on, some times I hit it, sand it and hit it again...the "trick" is to build it up enough to get it smooth.
Jazz_Painter likes this.
lilpaintchic is offline   Reply With Quote
Old 08-30-2016, 05:14 AM   #20
Senior Member
 
Join Date: May 2016
Posts: 105
Rewards Points: 210
Thanks: 28
Thanked 35 Times in 23 Posts
View Technogod's Photo Album My Photos
Default

white pigmented shellac primer for lower end jobs.
two part cat primer for the higher end jobs.

-spray lightly white shellac for a guide coat.surface and edges.
-150 grit sanding complete to clean the surface defects and scratch.lightly sand and take the fuzz on the edges.
-spray full strength either shellac or cat primer.both the surface and edges.
-sand 220 for heavy body finishes or 320 for finer like lacquer or conversion varnish.
This schedule is what i do for my cabinets.
Jazz_Painter likes this.
Technogod is offline   Reply With Quote
Reply

Tags
None

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Paint and primer? Shocker General Painting Discussion 1 07-08-2016 07:34 PM
100% acrylic latex hi gloss over oil based primer harold63 General Painting Discussion 12 04-23-2016 03:18 AM
Advice on primer problem HollisPainting General Painting Discussion 7 04-02-2016 11:46 AM
Lacquer primer over brushing putty DynaPLLC General Painting Discussion 12 02-04-2016 11:18 AM
oil based primer...delamenating underlayment harold63 General Painting Discussion 6 01-16-2016 09:40 PM


All times are GMT -4. The time now is 01:01 PM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.1
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
User Alert System provided by Advanced User Tagging (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Our Pro Sites Network
ContractorTalk.com | DrywallTalk.com | ElectricianTalk.com | HVACSite.com | PlumbingZone.com | RoofingTalk.com