Bonding fiberglass to steel

[snappytravis]

3m 8115 is a great product, I used it when I rebuilt a wrecked viper. I honestly don't think that you can bond two different substrates (steel and fiberglass or smc) and have 100% for long term use. I live in Wyoming and did some fiberglass work on a truck I had in high school. It cracked out a few years later. We have extreme temperature variations from winter to summer. I think it depends on where you live and if you leave your car outside in the winter vs a heated garage. 3m makes two different guns here is a picture of one that might save you a few bucks if you decide you want to buy one.
http://thumbs.ebaystatic.com/d/l140/...V3DTtiXXUQ.jpg

[jlcustomz]

For someone with only a little bit of work to do & not wanting to buy a special 2 part gun, you can cut a scrap of 1 x 4 lumber with a slit in it to push into the 2 individual tubes & mount it in the large sized home caulking guns. Worked for me.

[Pro Touring SS]

I use this in my shop quite a bit and it is hands down one of the best products I have ever used, there are other companies that make similar products and all work great but I would stick to this if you have little to no experience using bonding agents.

http://3mcollision.com/products/adhe...ive-08115.html

[dhutton]

I use this in my shop quite a bit and it is hands down one of the best products I have ever used, there are other companies that make similar products and all work great but I would stick to this if you have little to no experience using bonding agents.

http://3mcollision.com/products/adhe...ive-08115.html

X2, great product.

Don

[jaybee]

Thanks for the info. But what about "glass" bodies/firewall? Do they burn also?

The early Lotus Esprit a guy once rebuilt in my home town did...on its first drive.

As another thought, anything you bond to should be bonded to an edge of the fiberglass part. As an example I know of a '38 Chevy with fiberglass hood top built to hinge at the rear. It has a pair of oak planks bonded to the underside and glassed in to provide attachment for the hinges, running side to side. No matter what, differing temps allow the planks to distort the hood surface and show in reflections off the paint.

[Munssey]

A little late to the conversation but wanted to pass along this guide that should help you make the right choice for bonding composites. Hopefully, this will serve as a good guide for others with a similar project. This is the guide for 3M Scotch-Weld two part adhesives. You should find what you're looking for from this list.

Spidy senses say you're probably interested in their DP-410 or DP-490.

Good luck with the flares.

http://multimedia.3m.com/mws/media/3...hesive%20Guide