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Air bubbles

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=79026
Printed Date: September 24, 2021 at 6:20 PM


Topic: Air bubbles

Posted By: darthness
Subject: Air bubbles
Date Posted: June 12, 2006 at 3:02 PM

Ok so today i've been working on my very first fiberglass project... doing kick panels for my car. Anyway, i pulled the mold out about an hour ago and it seems i have quite a few air bubbles.. how can i fix them? they're accessable from the back but i don't want to do to much on that end and risk it not fitting as well... can fill them in with resin?

I have 2 layers on so far and plan to add another layer on tommorow.



Replies:

Posted By: djfearny2
Date Posted: June 12, 2006 at 3:49 PM
leave the bubbles if its going to be too hard to accomplish from the front than you have no real choice. if using mat usually you get bubbles if you dont apply resin good enough to matting making it sink in and saturated. however you should be ok as your only doing kicks.

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Jon
Installer/Help Technician
---coral springs florida---
mecp certification is not always needed. I have it and it has not helped me out at all. my experience out shines it.




Posted By: darthness
Date Posted: June 12, 2006 at 5:30 PM
yeah i kinda figured for kick panels it wasn't a huge deal.


but in the future how can i avoid it. i'll probably buy some sort of roller as i've heard those help get rid of any bubbes.




Posted By: aceracer24
Date Posted: June 12, 2006 at 8:41 PM
Funny you should bring this up, I saturated my mat really well and still had mass bubbles today, could this be a result of the under resin either not dry or to dry? The mat just didn't seem to want to stick at all :(

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1968 VW Beetle
Pioneed DEH-780MP, 2 10' Memphis PR104D, Memphis PR500.1, TXC 6.1, MTX Thunder 8502




Posted By: Velocity Motors
Date Posted: June 12, 2006 at 9:19 PM

Use a roller and this will get rid of all your air bubbles.



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Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA




Posted By: aceracer24
Date Posted: June 12, 2006 at 9:20 PM
well, I am having a hard time finding one and whats the roller made out of anyway? I tried a wall paper roller made of plastic, that didn't work and I tried a socket lol...metal of course but that just pulled the mat up.

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1968 VW Beetle
Pioneed DEH-780MP, 2 10' Memphis PR104D, Memphis PR500.1, TXC 6.1, MTX Thunder 8502




Posted By: Velocity Motors
Date Posted: June 12, 2006 at 9:35 PM

posted_image

This is kind of like what I use. The roller is corrugated to allow for the extra resin to squeeze out of the matting and spread out evenly to the rest of the project.

Here's another one that I want to get, but haven't.

posted_image



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Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA




Posted By: aceracer24
Date Posted: June 12, 2006 at 9:51 PM
any idea where I can buy one and how do you keep them from pulling the freshly laid mat back up? THis is the problem I was having...but that could be do to the type I was using also. Home Depot doesn't carry a roller like either one of those at least that I can find anyway.

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1968 VW Beetle
Pioneed DEH-780MP, 2 10' Memphis PR104D, Memphis PR500.1, TXC 6.1, MTX Thunder 8502




Posted By: Velocity Motors
Date Posted: June 12, 2006 at 10:13 PM
https://www.fibreglast.com/showproducts-category-Applicators-96.html#275

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Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA




Posted By: aceracer24
Date Posted: June 12, 2006 at 10:29 PM
Thanks Jeff much appreciated!

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1968 VW Beetle
Pioneed DEH-780MP, 2 10' Memphis PR104D, Memphis PR500.1, TXC 6.1, MTX Thunder 8502




Posted By: church_of_bass
Date Posted: June 12, 2006 at 11:58 PM

those are sweet...have to get me one of those this week.  I'm doing a single 12" enclosure in the left rear corner of an intrepid on wednesday, this will be a godsend...been using a rubber roller...it sucks...thanks, jeff



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"alcohol and night swimming - It's a winning combination!" - Lenny




Posted By: Velocity Motors
Date Posted: June 13, 2006 at 8:42 AM
No problem guys. Just a quick maintenance note on these roller, make sure that you have a glass of Acetone handy for you to soak the roller in to dilute the resin so you can keep the roller clean and free of resin inside the grooves.

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Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA




Posted By: aceracer24
Date Posted: June 13, 2006 at 12:25 PM
got it, real quick question. After my last layer of glass was laid and dried, there are some serious bubbles all over it. I still need to lay a layer or 2 more down so should I sand out these bubbles currently? It's an amp rack so even though the bubbles weaken it some, the rack should still be plenty strong. Also on that same note, if I don't have time to put all the layers I need at once,do I have to sand it a bit the next day before laying more glass or just lay the glass without sanding?

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1968 VW Beetle
Pioneed DEH-780MP, 2 10' Memphis PR104D, Memphis PR500.1, TXC 6.1, MTX Thunder 8502




Posted By: sprawl85
Date Posted: June 13, 2006 at 1:50 PM
drill a hole in them and fill them with a syringe full of resin/hardener mix. Or else you will have to sand all the way through the layer above the bubble and then fill the dip in with resin.

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fiberglass reminds me of peanut brittle... but fiberglass tastes better!




Posted By: aceracer24
Date Posted: June 13, 2006 at 2:05 PM
This would take to long, I would be better off sanding it down....

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1968 VW Beetle
Pioneed DEH-780MP, 2 10' Memphis PR104D, Memphis PR500.1, TXC 6.1, MTX Thunder 8502




Posted By: sprawl85
Date Posted: June 13, 2006 at 6:56 PM
oh there are that many huh? hehe..

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fiberglass reminds me of peanut brittle... but fiberglass tastes better!




Posted By: aceracer24
Date Posted: June 13, 2006 at 7:11 PM
lol yes posted_image This has been the biggest project I have done at once so alot of area to cover and for some reason the glass would not stick so I ended up with a ton of bubbles. I don't think it will hurt anything, I won't be able to paint it thats for sure unless I do a ton of prep work. Then again, I plan to make a glass cover to go over the main rack since I am going to have to cut holes in it anyway in strategic places to run all of the amp wiring and stuff. So I would like to avoid the bubbles for next time.

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1968 VW Beetle
Pioneed DEH-780MP, 2 10' Memphis PR104D, Memphis PR500.1, TXC 6.1, MTX Thunder 8502




Posted By: hifihacks
Date Posted: June 24, 2006 at 2:51 AM
I find as well as a roller, use a stiff (or 'sawn off') paint brush and stippling. This works well with chop strand, as it helps dissolve the binder and get the glass 'into' the resin on the job, rather than 'on' the resin.

Car audio Fiberglass information

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