What weight of fiberglass should i use?
Printed From: the12volt.com
Forum Name: Fiberglass, Fabrication, and Interiors
Forum Discription: Fiberglass Kick Panels, Subwoofer Enclosures, Plexiglas, Fabrics, Materials, Finishes, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=35483
Printed Date: July 16, 2025 at 9:20 AM
Topic: What weight of fiberglass should i use?
Posted By: Alpine Guy
Subject: What weight of fiberglass should i use?
Date Posted: July 12, 2004 at 8:36 PM
Im looking at getting mat for my project, , i see it goes from 3 oz to 40 oz, , , which should i get?? It will be covering pretty large serface area's, , , (back of suv). And also, ,what resin and hardener should i get. I think im gona get it from us composits. ------------- 2003 Chevy Avalanche,Eclipse CD7000,Morel Elate 5,Adire Extremis,Alpine PDX-4.150, 15" TC-3000, 2 Alpine PDX-1.1000, 470Amp HO Alt.
Replies:
Posted By: Alpine Guy
Date Posted: July 13, 2004 at 8:09 PM
hello? anyone??
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2003 Chevy Avalanche,Eclipse CD7000,Morel Elate 5,Adire Extremis,Alpine PDX-4.150, 15" TC-3000, 2 Alpine PDX-1.1000, 470Amp HO Alt.
Posted By: xtreamcc
Date Posted: July 14, 2004 at 12:15 AM
polyester resin and MEKP hardener are the appropriate resin and hardener for fiberglass. As for the weight, well it really doesn't matter, just depends on how many layers you want to lay. For instance, the 3oz mat is the same as the 40oz mat, just not a dense. Really what ever fits your budget is usually good. I usually just get the stuff that they sell at walmart, homedepot, autozone etc that comes in the little 8sqft packages and then add between 6 and 10 layers depending on the projects specifications. I imaging something like 40oz would be a good weight for something like a heavy tripple 15" sub box, whereas the 3oz would be for something like a small kick panel etc. Fiberglass mat is fiberglass mat to me. Good luck with it.
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"Shiny chrome when used in conjunction with bikini models is particularly effective in inducing brain deficit disorder"
02 Jeep Grand Cherokee
Monster System on its way.
Posted By: CarAudioHelp
Date Posted: July 14, 2004 at 4:41 PM
I always use chop mat instead of the woven cloth for something like that. Chop mat is readily available in 2oz and lower weights while woven mat is available in the higher weights. You can use something like Coremat if you need to bulk it up without adding extra layers of fiberglass. Use MDF for flat areas to save money and add strength.
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Posted By: Alpine Guy
Date Posted: July 14, 2004 at 9:41 PM
excellent! thanks, , 1 more quick question, , , should a gallon on resin be enough to build a box to completely fill my rear of my pathfinder?? As long as its not to much for what im doing i will be happy, , cuz its always easy to buy more.
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2003 Chevy Avalanche,Eclipse CD7000,Morel Elate 5,Adire Extremis,Alpine PDX-4.150, 15" TC-3000, 2 Alpine PDX-1.1000, 470Amp HO Alt.
Posted By: CarAudioHelp
Date Posted: July 15, 2004 at 8:24 AM
I'm not sure what you call "completely fill" so it's a little hard to say. A Pathfinder is pretty big so probably not. It really depends on how much square footage you're covering and how thick you're laying the mat. More mat + more area = more resin. See if your supplier will let you return any unopened containers if it's within a certain time frame.
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Posted By: defective
Date Posted: July 15, 2004 at 9:59 AM
you will definately need more than a gallon.... is this the same idea as you drew in the other post? (the one i lit on fire?) if so, you'll probly wanna buy a 5 gal bucket..... you'll need it.
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Posted By: Alpine Guy
Date Posted: July 15, 2004 at 9:30 PM
yuppers, , pic of flame job haha, , im gona do my floor with a a plexi window to see my 4 amps all across the floor, , so i gota raise the floor 2.5" or cut the floor and weld a box in there. I just can't wait to get started and go to town on this baby.
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2003 Chevy Avalanche,Eclipse CD7000,Morel Elate 5,Adire Extremis,Alpine PDX-4.150, 15" TC-3000, 2 Alpine PDX-1.1000, 470Amp HO Alt.
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