aluminum foil on back
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=66788
Printed Date: May 12, 2025 at 6:12 AM
Topic: aluminum foil on back
Posted By: camrymatrix
Subject: aluminum foil on back
Date Posted: November 21, 2005 at 10:37 PM
first off, u guys are very informative.. now, i built a mold for a id10 sub for a matrix. (previous mdf sub was too big), and i stuck a bunch of aluminum foil on the backend to prevent the resin from sticking onto the panels. the glassing portion came out okay, and when i removed the mold, it seemed pretty good. as i tried removing the foil from the back, it became a bitch to remove. i took out a good portion, but some of the foil still got left in the crevices. i decided to glass another layer on the back side. would this be okay? heres the pic: https://www.imagestation.com/picture/sraid195/p4cc0858bec4ecd817e3534313214015e/f15c6cad.jpg
Replies:
Posted By: drvnbysound
Date Posted: November 21, 2005 at 10:41 PM
Thats why I use vinyl duct tape and mold release wax.
It should be fine as long as you rolled the matting out well (got any bubbles out).. so its a truly sold fiberglass form.
Posted By: camrymatrix
Date Posted: November 21, 2005 at 10:51 PM
Posted By: camrymatrix
Date Posted: November 21, 2005 at 10:54 PM
drvnbysound wrote:
Thats why I use vinyl duct tape and mold release wax.
It should be fine as long as you rolled the matting out well (got any bubbles out).. so its a truly sold fiberglass form.
i got most of my bubbles out, except there were 2 huge bubbles about 1/2 inch in the middle. realizing my mistake, i just added a few more layers. felt pretty strong overall. my next step would be to fleece the edges. im planning not to use rings, but just a flush install. the space im using is quite limited so nothing fancy.
Posted By: drvnbysound
Date Posted: November 21, 2005 at 10:58 PM
The best thing to do when you find bubbles after the mold has dried.. if they are inside the layers, I usually drill holes in the top layers out and fill with resin (and some matting if possible).
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Posted By: Wherm
Date Posted: January 21, 2006 at 10:55 PM
Wire brushes work good for removing the foil. On my last project I used compressed air. My air compressor puts out 115 psi at the guage and using my blowgun the air just peeled it away.
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Posted By: total_overkill
Date Posted: January 22, 2006 at 4:18 AM
drvnbysound wrote:
The best thing to do when you find bubbles after the mold has dried.. if they are inside the layers, I usually drill holes in the top layers out and fill with resin (and some matting if possible).
Found using a syringe works good too. Make sure the end is thick though. the small ones dont take in the resin well. pop it in and inject. ------------- 40 grit has saved my life sometimes =[
Posted By: HottAccord
Date Posted: January 22, 2006 at 7:32 PM
Wow..looks like you mixed up a hot batch of resin since your mold looks pretty dark.
Anyway, its a good idea to do what other have said, mold release wax works great.  ------------- Im a fiberglass whore!!
Posted By: tuscani
Date Posted: January 23, 2006 at 9:48 PM
holy hot batch!!!
way too much hardener... lol nice little toxic fumes that put off huh?
easy WAY up on the hardener, and you wont have a problem getting the tinfoil off.
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