aluminum foil on back

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camrymatrix

Member - Posts: 3

Joined: November 21, 2005

Posted: November 21, 2005 at 10:37 PM / IP Logged

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:

http://www.imagestation.com/picture/sraid195/p4cc0858bec4ecd817e3534313214015e/f15c6cad.jpg

drvnbysound

Silver - Posts: 289

Joined: May 06, 2002

Location: United States

Posted: November 21, 2005 at 10:41 PM / IP Logged

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.

camrymatrix

Member - Posts: 3

Joined: November 21, 2005

Posted: November 21, 2005 at 10:51 PM / IP Logged

Sorry, heres the pic

http://www.imagestation.com/picture/sraid195/p0ba87a2c15b1b3ba5c968bd5f78aacac/f15c4df7.jpg

camrymatrix

Member - Posts: 3

Joined: November 21, 2005

Posted: November 21, 2005 at 10:54 PM / IP Logged

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.

drvnbysound

Silver - Posts: 289

Joined: May 06, 2002

Location: United States

Posted: November 21, 2005 at 10:58 PM / IP Logged

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).

Wherm

Copper - Posts: 51

Joined: August 19, 2003

Location: United States

Posted: January 21, 2006 at 10:55 PM / IP Logged

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.

total_overkill

Copper - Posts: 93

Joined: November 24, 2005

Location: Canada

Posted: January 22, 2006 at 4:18 AM / IP Logged

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 =[

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HottAccord

Silver - Posts: 247

Joined: August 12, 2004

Location: United States

Posted: January 22, 2006 at 7:32 PM / IP Logged

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. aluminum foil on back -- posted image.

Im a fiberglass whore!!

tuscani

Member - Posts: 27

Joined: January 06, 2006

Posted: January 23, 2006 at 9:48 PM / IP Logged

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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aluminum foil on back

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