What glue to use?

wixy · 2nd February 2007, 09:38 PM

I'm about to start building these speakers out of mdf: http://www.fostexinternational.com/d...ez_enclrev.pdf

What type of glue should I use, or is any wood glue ok?

Would I need to use any screws?

Is it necessary to use some sort of sealent between the joints inside the cabinet?

Cal Weldon · 2nd February 2007, 09:42 PM

Quote:

Originally posted by wixy
What type of glue should I use, or is any wood glue ok?

Any wood glue is fine. I use the yellow stuff but white is fine.

Quote:

[i]Would I need to use any screws?[/B]

It depends on how many clamps you have.

Quote:

[i]Is it necessary to use some sort of sealent between the joints inside the cabinet? [/B]

Not if you use lots of glue.

This is your first go at it?

wixy · 2nd February 2007, 09:44 PM

Yep, first go. Thanks for the advice. I plan on getting some clamps and doing it all in stages, so I guess that means I won't need any screws?

Cal Weldon · 3rd February 2007, 12:20 AM

My personal favourite is inside corner blocking and a brad nailer so all but the back of the cabinets have concealed fasteners. No clamps required and fast assembly once the blocks are in place.

Your way is fine if you don't mind waiting. No screws required.

TerryO · 3rd February 2007, 12:55 AM

Cal said:

My personal favourite is inside corner blocking and a brad nailer so all but the back of the cabinets have concealed fasteners. No clamps required and fast assembly once the blocks are in place.

Your way is fine if you don't mind waiting. No screws required.

~~~~~~~~~~~~~~~~~~~~~~~~~~~
I have to agree with Cal on the use of cleats, it's as basic as can be and produces a strong cabinet. I've used nails, screws, clamps, straps, etc., and yet cleats and brads work just as well or better. It's pretty fast, which when you're using carpenter's glue is a factor that should be given a fair amount of consideration.

I like yellow glue best for MDF or ply and Weldwood for dark hardwoods. Weldwood is strong, but needs tight joints. I've used it for boatbuilding and the one criticism I heard for that application is that it isn't water proof because it won't hold if boiled. The late Capt. Pete Culler, boat designer and builder advised: "If you plan on boiling your boat don't use it!"

Seriously, Yellow glue is more than strong enough to preclude any further consideration.

Best Regards,
TerryO

wixy · 3rd February 2007, 03:51 AM

I think I will give yellow glue a shot, thanks guys!

roddyama · 3rd February 2007, 04:09 AM

If you do decide to use screws (I do), be sure to use a countersinking drill for each screw. MFD has a tendency to split when you try to force a screw or nail in where there isn't a pilot hole.

planet10 · 3rd February 2007, 08:22 AM

Quote:

Originally posted by wixy
mdf 208ez_enclrev

Fostex -- and many namy people that have built these in mdf -- recommend that you use plywood.

dave

Geoff H · 3rd February 2007, 10:14 AM

Slightly off topic, but I think worth noting. MDF (in this country anyway) seems to be non-consistent in density. I have noticed this on the jigsaw, panel saw, and drilling.

If you can, use a good quality outdoor grade ply.

Cleats not only make a stronger joint as others have pointed out, will provide more surface area to seal and make the joints air-tight.

I don't know what's in MDF, but I have noticed special glue (PVA type) and primer labelled for MDF.

FWIW I screw and glue. Too impatient for clamps.

Geoff.

Cal Weldon · 3rd February 2007, 02:17 PM

Quote:

Originally posted by Geoff H
FWIW I screw and glue. Too impatient for clamps.

I use brads and blocks. Too impatient for screws and glue.

2nd February 2007, 09:38 PM	#1
wixy diyAudio Member Join Date: Mar 2006 Location: Melbourne, Australia	What glue to use? I'm about to start building these speakers out of mdf: http://www.fostexinternational.com/d...ez_enclrev.pdf What type of glue should I use, or is any wood glue ok? Would I need to use any screws? Is it necessary to use some sort of sealent between the joints inside the cabinet?

3rd February 2007, 12:20 AM	#4
Cal Weldon Speakerholic diyAudio Moderator Join Date: Jan 2004 Location: British Columbia	My personal favourite is inside corner blocking and a brad nailer so all but the back of the cabinets have concealed fasteners. No clamps required and fast assembly once the blocks are in place. Your way is fine if you don't mind waiting. No screws required. __________________ Next stop: Margaritaville Some of Cal's stuff \| Cal Weldon Consulting

3rd February 2007, 12:55 AM	#5
TerryO diyAudio Member Join Date: Nov 2002 Location: Seattle,Wash.	Cal said: My personal favourite is inside corner blocking and a brad nailer so all but the back of the cabinets have concealed fasteners. No clamps required and fast assembly once the blocks are in place. Your way is fine if you don't mind waiting. No screws required. ~~~~~~~~~~~~~~~~~~~~~~~~~~~ I have to agree with Cal on the use of cleats, it's as basic as can be and produces a strong cabinet. I've used nails, screws, clamps, straps, etc., and yet cleats and brads work just as well or better. It's pretty fast, which when you're using carpenter's glue is a factor that should be given a fair amount of consideration. I like yellow glue best for MDF or ply and Weldwood for dark hardwoods. Weldwood is strong, but needs tight joints. I've used it for boatbuilding and the one criticism I heard for that application is that it isn't water proof because it won't hold if boiled. The late Capt. Pete Culler, boat designer and builder advised: "If you plan on boiling your boat don't use it!" Seriously, Yellow glue is more than strong enough to preclude any further consideration. Best Regards, TerryO __________________ "If you have to ask why, then you're probably on the right track." quote from Terry Olson's DIYaudio Forum application

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2nd February 2007, 09:44 PM	#3
wixy diyAudio Member Join Date: Mar 2006 Location: Melbourne, Australia	Yep, first go. Thanks for the advice. I plan on getting some clamps and doing it all in stages, so I guess that means I won't need any screws?

3rd February 2007, 03:51 AM	#6
wixy diyAudio Member Join Date: Mar 2006 Location: Melbourne, Australia	I think I will give yellow glue a shot, thanks guys!

3rd February 2007, 10:14 AM	#9
Geoff H diyAudio Member Join Date: Oct 2006	Slightly off topic, but I think worth noting. MDF (in this country anyway) seems to be non-consistent in density. I have noticed this on the jigsaw, panel saw, and drilling. If you can, use a good quality outdoor grade ply. Cleats not only make a stronger joint as others have pointed out, will provide more surface area to seal and make the joints air-tight. I don't know what's in MDF, but I have noticed special glue (PVA type) and primer labelled for MDF. FWIW I screw and glue. Too impatient for clamps. Geoff.

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