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Seal MDF the wood not the joints?

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=55353
Printed Date: April 28, 2024 at 5:31 PM


Topic: Seal MDF the wood not the joints?

Posted By: 03sdccfx4
Subject: Seal MDF the wood not the joints?
Date Posted: May 08, 2005 at 2:59 PM

What is the best thing to use to seal the wood itself?  Does it need to be sealed?  I was going to do it just in the event that water, moisture, or other liquid was to get on it, to keep the wood from coming apart.

I have all my wood cut now and should be screwin' and gluein' later tonight or tommorrow evening.



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'03 F-250 CC Fx4



Replies:

Posted By: Poormanq45
Date Posted: May 08, 2005 at 3:03 PM
You can use standard wood sealer.

It's not necessary though, but a good idea if there's a chance for water contact.

Or you could fiberglass the outside. It'd look good, and seal it.

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Posted By: 03sdccfx4
Date Posted: May 08, 2005 at 3:50 PM

Poormanq45 wrote:

You can use standard wood sealer.

It's not necessary though, but a good idea if there's a chance for water contact.

Or you could fiberglass the outside. It'd look good, and seal it.

Fiber glass like just one layer and then paint?



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'03 F-250 CC Fx4




Posted By: forbidden
Date Posted: May 08, 2005 at 4:54 PM
No need for fibreglass unless it is to strengthen the enclosure or the joints. Poormanq45 was on the right path if he said don't use the fibreglass, just use the resin. If moisture is a concern, mix up some fibreglass resin in a can (not plastic container) and get out a paintbrush and paint the stuff on. This will seal the box from moisture. If it is a moisture concern (IE - you have a damp tunk all the time), resin the inside and outside of the box. While you are on the inside, throw a little glass matting in up against the seams to help strengthen that join, should cost you a whole $5.00 for some scraps of glass mat that can be cut into strips to go in.

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Top Secret, I can tell you but then my wife will kill me.




Posted By: Poormanq45
Date Posted: May 08, 2005 at 4:59 PM
Yeah I forgot to mention that. You can just use the resin/hardner.

Forbidden: Why did you say not to use a plastic container to mix the resin in?

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Posted By: forbidden
Date Posted: May 08, 2005 at 5:06 PM
Watch what happens to resin when you accidentally put too much hardener in it....... this is a chemical reaction that happens, a byproduct of this chemical reaction is smoke, where there is smoke, there is heat and in an extreme case, fire. Watch the plastic container start to melt. In a tin can, the excess resin once it has cured can be removed very easy and the can used again and again. So kids, do your resin mixing in a well ventilated area, use a respirator and so no Sony.

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Top Secret, I can tell you but then my wife will kill me.




Posted By: Poormanq45
Date Posted: May 08, 2005 at 5:33 PM
Oops, I've been using a plastic container. Good thing I didn't use too much hardner.

Thanks for the advice

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Posted By: audiobass10
Date Posted: May 08, 2005 at 5:40 PM

You should always at the very least seal the joints with a substance such as liquid nails. Resin works excellent for sealing the wood as said above, and in some cases can increase your SPL score (if you were a competitor).



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Dave

Pioneer Premier DEH-P660
15" Kicker CVR
Profile AP1000M
It's Loud




Posted By: Captanham
Date Posted: May 08, 2005 at 5:51 PM
haha you can use plastic, just be carefull, i use solo cups, haha, i melt them everytime, ohh well, they are cheap and i just mix up a small batch, use it fast, and then throw the cup away once it's hardend. you really shouldn't be putting that much hardner in the mix anyways

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Bad Boys Customs
    audio - video - security

If you use it. Suport it. Donate to the 12 volt!




Posted By: 03sdccfx4
Date Posted: May 08, 2005 at 7:17 PM

Thanks guys!  I am using liquid nails for the box construction.  I will then silicon all the interior joints.  I must wanted to make sure the box will not get water damaged.  It shouldn't anyways though as it is inside the cab of a fairly new truck.

How does the fiberglass resin increase SPL in competitions, by making the box more rigid?

Also what is the best way to carpet the enclosure and make it look good? The box is a wedge shape and it is 47.5" long and 15" tall, 8.5 at the bottom and 4.5 at the top.



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'03 F-250 CC Fx4




Posted By: Captanham
Date Posted: May 08, 2005 at 7:33 PM

use one peice and wrap it around, take your time, use good glue, and try and make seams at the corners,

couple of tricks,,,, spray the glue on both sides (carpet, and the box itself) then let tack for about 10 seconds before you put them together....

also, make your seems with just a little tad bit extra material, then use a razor blade with kind of a shaving motion on the extra to blend the seam in.. you might have to try more then once if it's your first time, it takes some practice...

also, just the resin alone wont really do THAT much in spl, if you put a few layers of glass on it will just make the box more ridgid and that will help out a bit, but not much,   but it's still good to use the resin for waterproofing, that works really well, i have done it to a few boxes



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Bad Boys Customs
    audio - video - security

If you use it. Suport it. Donate to the 12 volt!




Posted By: audiobass10
Date Posted: May 08, 2005 at 11:09 PM
Resin may or may not help you. In some people's cases it has increased their score by a DB. That's quite the gain off something so small.

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Dave

Pioneer Premier DEH-P660
15" Kicker CVR
Profile AP1000M
It's Loud




Posted By: 03sdccfx4
Date Posted: May 08, 2005 at 11:56 PM

I am not really going for SPL (although it is nice) I just like really nice clean bass that goes with the rest of the full range.

The guys at the shop where I buy my stuff said that with what I have I shouldn't have a problem hitting 140dB if I wanted to.  That is plenty loud for a daily driver.



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'03 F-250 CC Fx4




Posted By: spyder340
Date Posted: May 09, 2005 at 11:57 PM
i've used resin alone for a sealer, to ensure no air leaks where it's not supposed to.  personally, i compete on a regular basis and have never saw fiberglass enclosures give  any distinct advantage in spl terms.

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96 firechicken- kicker cvr 15's, spl 1600 watt, optima yellow top, 2.0 farad cap, sealed box and 146.8 db :)<---now upto 147.2 S2 meca class, going for 128 on a drive by :)





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