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-   -   Gluing and painting MDF (http://www.diychatroom.com/f14/gluing-painting-mdf-125612/)

Ranger1227 12-04-2011 08:13 PM

Gluing and painting MDF
 
I am making a platform for my new 55" tv. It will be approximately 18 x 24. I plan on gluing to pieces of MDF together in order to get the height I need and then spray paint it glossy black. I have two questions.

1. Can I use wood glue to glue the two pieces together?

2. What can I do to the edges to keep the paint from just soaking in. Will primer be sufficient?

Just Bill 12-05-2011 07:46 AM

Tightbond or similar works well on MDF, but it is not really structural. Not sure exactly what you are building, but it might need more than glue. As for painting MDF, it takes paint well. Seal the edges with a sealer/primer such as Zinzers or shellac. And everything painted should have a primer.

Ranger1227 12-05-2011 09:07 AM

Mdf
 
It is a small platform to place my new TV stand on. We need to raise it up about 1/1/2 inches for the xbox, etc. It comes with a stand that is about 16x20 and we want to place the TV on a slightly bigger base. So, the TV wil rest on this new platform.

joecaption 12-05-2011 10:11 AM

I'd use cabinet grade 3.4" plywood instead, stronger, far less chance of sagging, holds screws and glue better.

jschaben 12-05-2011 11:30 AM

Quote:

Originally Posted by Ranger1227 (Post 786461)
It is a small platform to place my new TV stand on. We need to raise it up about 1/1/2 inches for the xbox, etc. It comes with a stand that is about 16x20 and we want to place the TV on a slightly bigger base. So, the TV wil rest on this new platform.

Regular Titebond II or Elmers Carpenter glue will hold well. Glue sizing will work fine for sealing the edges. Just thin the wood glue about 50-50 with water and brush it on the edges.
Is this going to be completely supported all the way around or are you leaving the front/back open for wires and whatever? How much does the TV weigh? I'm guessing less than 50 lbs.
:)

woodworkbykirk 12-05-2011 08:35 PM

regular wood glue works fine, dont water it down... thats pointless. squeez some on and smooth it out.

as for painting the edges, sand it first as it will get "fuzzy" otherwise, for square edges run some drywall compound along it to fill the small voids, this works wonders, then use the alkyd based bin primer. it set up smoother and reduce the amount of sanding needed between coats

Ranger1227 12-05-2011 09:08 PM

Thanks. Do I need to scuff upthe flat surfaces before gluing to get a better hold?

SteelToes 12-06-2011 11:00 AM

1 Attachment(s)
I would rely on just the glue and finishing nails for the MDF.

They make Tri Lock screws that are specially designed to be used with mdf and fiberboard type of materials.

From the description page ;

The Tri-Lock TS is a unique threadform that utilizes a twin and single thread on the same screw, enabling a permanent installation and high pull-out retention while cutting insertion torque by 25%.

woodworkbykirk 12-06-2011 06:56 PM

you dont need to scuff up the ends of the mdf, the raw cut ends are like a sponge it will take the glue no prob

if your going to use screws, be sure to drill 1/8 pilot holes in both peices, other wise the material WILL split, especially if its within 4" of the edge


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