S Bolton

I want to glue two 24 x 36 pieced of MDF together. Both would be 3/4 inches. What is the best way to glue and get it right? Does contact adhesive work.

I want it flat and I want it to stay together.

Thanks for input.

sb

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Mike

Contact cement will work fine.

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bobj3

Hi SB

Just my 2 cents

Just about any of the new glues will do the trick,white,yellow,etc.
They will give you a bit of time to line the parts up b/4 it sets..

If it's MDF put in on both boards then get if flat with some scrap stock,just drag the glue around and take out the high points....don't get cheap with the glue... this is a one time glue up thing and a one shot thing..

If you get some out on the edges just wipe it off with a wet rag....

Then set it off to one side for 1/2 day, so the glue can do it's work ... if you want you can stack some boards on top of the top but you don't need to clamp it the norm because the MDF is flat....


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S Bolton

Bob: Do you think contact adhesive is OK?

sb

bobj3

Hi SB

I don't care for it once the boards are in place that's it, you only have less than a min.to move it if that ...it holds well but you need to be quick and because the boards are big it's hard to do in one quick move..

You could build a frame around the out side and let the frame help get it right in one quick drop..

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Mike

Actually there is virtually no movement once the two pieces with contact cement come together. I usually get a friend to assist when joining anything with contact cement so alignment is simple. BJ is absolutely right when he says it's easier to use white or yellow glue by yourself. Either way will give you a very good bond.

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S Bolton

What about yellow glue and then screws instead of clamps?

sb

S Bolton

What is the best way to check for level (across the top of the mdf)? 89.00 steel bar from Lee Valley? Something cheaper from Menards, Home Depot?

sb

dharmabum

I'm just finishing up a modified version of Norm's new router table, and that's what I used. One (1) layer of 1/2" and one (1) layer of 3/4" MDF glued with titebond III, and screwed together. Just be careful you don't get any screws where you will be cutting for a insert plate.

bobj3

Hi SB

Just the glue. it will do the trick....screws will LIFT the board up,that's the funny part about of MDF, do this for a quick test screw some MDF boards together and then take it a apart and take are hard look at it...rub your hand over the hole and you will see what I'm talking about... or take a sanding block and sand it down just bit and you will see the bump...it's just the way MDF is...

do this for a quick test glue some boards up with some yellow glue wait about 2 hours then try and pull it apart, it will pull apart just like cardboard...or not at all...with a hole(plug) or two...

==========

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