I'm working on a mold that will fit into one of my existing interior panels.

In the past, I used a light mist of spray adhesive to glue foil to the panel, and then worked with the glass after that. I tried to use tape like I saw a few how-to's recommend, but I couldn't ever get the tape to stick to the plastic, even after cleaning it.

It worked decent, but I've heard that Petroleum Jelly will work as a release too.

Would this be a suitable release to use with a plastic interior panel without ruining the panel?

 

A few liberal coats of PVA followed up by some mold release wax should work....fiberglass won't stick to plastic though. Depending on the shape of the piece, what about saran wrap?

 

What is PVA? And where would I get it and/or mold release wax?

I've tried saran wrap in the past, it's rather difficult to make it stick down the way I want it to.

Also, I'm worried about vibrations between the fiberglass and the plastic. Would it be worth my time to cover the plastic in something like Dynamat/Peel and Seal, and then take the mold after I have that on the panel the box will fit into?

 

I really don't like PVA, but if you're going to use it, apply after waxing. Do not use PVA with an epoxy resin. Apply WAY too much. I like to apply with an old t-shirt and kind of dab it on. Seriously.

Also, you can bond fiberglass to plastic.

You can use bowling alley wax from Home Depot or Meguiars maximum mold release wax. Both will work fine. The bowling alley wax will costs 1/4 as much and is fine until you start using higher tempeture resins.

PTFE or Teflon will also work . . . kind of expensive and I'm never sure if I've applied enough.

AVTcomposites.com or uscomposites.com should be able to hook you up.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rcurley55 &raquo;</TD></TR><TR><TD CLASS="quote">A few liberal coats of PVA followed up by some mold release wax should work....fiberglass won't stick to plastic though. Depending on the shape of the piece, what about saran wrap?</TD></TR></TABLE>

 

back from the dead. Any fiberglass people out there that can tell me how to get fiberglass to stick to plastic? I have a few plastic peices I want to fiberglass and carbon fiber for the look and also because I have some custom speaker mounts that require it, and have heard that fiberglass does not stick to plastic. Any help on doing this would be a help.

 

depends on what kind of plastic it is - glass will stick to some kinds and won't stick to others.

What you can do is drill a series of holes in the plastic, then glass on both sides, so you sandwich the plastic between glass....

 

drilling the holes makes sense. I was going to rap it around all 4 corners so and roll the edge. Now I will do both.

Not sure of the plastic type, it is the plastic located on the door panels and dash. But the sandwich trick should solve it.