I am building a few enclosures w/ 3/4" MDF and plexi. Anyway, when putting the pieces together, I found that there are a few very small gaps between the MDF, even when screwed together and w/ liquid nails. I am wondering if I can use some kind of adhesive foam in place of the liquid nails which would, I assume, fill in the small spaces I have. I will still seal well w/ silicone. Any suggestions on what to use or where to get it?
Thanks

 

i had alot of holes and gaps that air was getting through, i used a large amount of liquid nail and it sealed it up real good

 

How are you cutting the MDF for the box that would leave gaps? 94

 

I have a small circular saw that I am using (used) by hand w/out a guide (because the guide wasn't long enough). I tried to cut as straight a line as possible, but as I said, there is a small, probably less than 1/16 of an inch gap at the end where the boards meet.

 

Resin the inside of the box to seal it. That would probably be the easiest way to do it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CrazyModGSR &raquo;</TD></TR><TR><TD CLASS="quote">I have a small circular saw that I am using (used) by hand w/out a guide (because the guide wasn't long enough). I tried to cut as straight a line as possible, but as I said, there is a small, probably less than 1/16 of an inch gap at the end where the boards meet. </TD></TR></TABLE>

OIC Try this , when I have to make a cut with a circular saw, [ I do have a table and radial arm saw in my shop] I will use the edge of a sheet of MDF as a guide, butting the edge of the saws bottom plate up against it, you get a pretty good cut that way,

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sopiwnykg &raquo;</TD></TR><TR><TD CLASS="quote">Resin the inside of the box to seal it. That would probably be the easiest way to do it.</TD></TR></TABLE>

I also use fiberglass resin inside my sub boxs to seal the MDF, MDF is a very porous, surprise! and if you don't belive me pull your subs and seal the inside of the box , you can use most anything, but resin works best, [other then the spray"dynamats"]

 

mines, my dimensions was barely off

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fcm &raquo;</TD></TR><TR><TD CLASS="quote">

MDF is a very porous, surprise! </TD></TR></TABLE>

are you saying its good to coat the inside? that air can pass through mdf??


all the more reason to PORT

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bassisliffe &raquo;</TD></TR><TR><TD CLASS="quote">

are you saying its good to coat the inside? that air can pass through mdf??


all the more reason to PORT </TD></TR></TABLE>

Yes it is, yes it can.

Even more important that a ported box be airtight [everywere except the port, bassisliffe,] DAH. 94

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fcm &raquo;</TD></TR><TR><TD CLASS="quote">

Yes it is, yes it can.

Even more important that a ported box be airtight [everywere except the port, bassisliffe,] DAH. 94</TD></TR></TABLE>


how can a ported box be air tight?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bassisliffe &raquo;</TD></TR><TR><TD CLASS="quote">


how can a ported box be air tight? </TD></TR></TABLE>

If air can leak out of the box anywere but at the port, how do you tune the port
And bass, I said [ everywere except the port] just for you, because I just knew you were going to ask,

[QUOTE=bassisliffe]

are you saying its good to coat the inside? that air can pass through mdf??


Take a shopvac stick it up to [ even 1 inch] MDF , drop some sawdust [ on other side , or if you have a sub in a box , and we know you do, listen, pull sub and seal, listen again