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View Full Version : securing plexi to mdf questions



traksta15
04-09-2007, 01:14 PM
So im thinking of making a box with a plexi glass window, my question is-how should I go about securing the plexi to the mdf?? The window won't be very big at all, about 12x12ish, maybe smaller. Would simple clear silicone sealant work? My plans are to make the back of my box have a window, then attach the plexi to the back therefore covering the window, then screw/glue the back mdf piece (with plexi) to the rest of the mdf box, I hope that explains it well enough, lol. Thanks in advance!

Trixter
04-09-2007, 01:23 PM
pan head screws w/ washers every few inches and some silicone...use at least 3/8" or 1/2" plexi.

traksta15
04-09-2007, 01:34 PM
Yeah I planned on using 3/4" plexi-what exactly are pan head screws? I can't just glue it to the mdf?

bumpnzx3
04-09-2007, 01:46 PM
I have always been told to use lexan rather than plexi. Lexan isn't as flexi as plexi. Where 3/4" plexi is used- 1/2" lexan can be used in it's place.

traksta15
04-09-2007, 02:06 PM
im getting it off www.estreetplastics.com is this stuff ok?
http://www.estreetplastics.com/category_s/31.htm

bikinpunk
04-09-2007, 02:09 PM
flexi as plexi

awwww, that's so cwute. ;)

traksta15
04-09-2007, 02:10 PM
lol

traksta15
04-09-2007, 06:11 PM
bump, is estreet good stuff?

THUMPPER
04-09-2007, 06:36 PM
I recommend using Lexan for the enclosure...
it is stronger and drills with a regular drill bit
with out cracking and it is crystal clear.....

this link shows how I attach MDF and Lexan.....
http://www.rockfordfosgate.com/forum/topic.asp?TOPIC_ID=26736

helotaxi
04-09-2007, 08:17 PM
Prob with Lexan is that if you scratch it it's trash. You can buff out scratches in plex (acrylic). Acrylic is not brittle like polycarb is and it also drills just fine with a normal drill bit.

Grim
04-09-2007, 09:46 PM
No you cant just glue it..

You need to drill and screw down. But be careful, it can be cracked easily and if you drill to fast, it heats up...

Trixter
04-10-2007, 07:59 AM
...exactly are pan head screws?

(self tapping) panhead screw---> http://img408.imageshack.us/img408/8403/selfdrillingscrewpanheayv0.gif (http://imageshack.us)

traksta15
04-10-2007, 04:44 PM
what length do you guys recommend?

Radioflyer97
04-11-2007, 02:45 PM
I have always been told to use lexan rather than plexi. Lexan isn't as flexi as plexi. Where 3/4" plexi is used- 1/2" lexan can be used in it's place.


I recommend using Lexan for the enclosure...
it is stronger and drills with a regular drill bit
with out cracking and it is crystal clear.....



I agree

lexan can be picked up at an lowes or Home depot. It really is drill friendly.

As far as attaching it, the cleanest way would be with the aformentioned screws. I'd also reccomend a rubber or dense foam seal around the edges. This will keep the enclosure air tight and also act as a spring lock washer to keep the screws from backing out.

Trixter
04-12-2007, 07:56 AM
what length do you guys recommend?

long enough to hold, short enough to not go through the to the other side of the wood....1"...1 1/4"...since your going with 3/4" plexi/lexon.

Eclipsed ION
04-14-2007, 01:28 AM
What if you are just using the plexi as a window for an acc (not the enclosure) could yo just glue it then?

traksta15
04-16-2007, 01:26 PM
I was also wondering this-anyone??

helotaxi
04-16-2007, 04:54 PM
If there isn't going to be any pressure put on it you can just fix it in place with a pressure fit or with two sided tape.