Molding Bumpers
Thread Starter
Drifting
Joined: May 2004
Posts: 1,258
Likes: 0
From: Huntsville Alabama
Molding Bumpers
Any of you out there that have molded the rear or front bumper in what did you do because of the bumper being urethane and the car fiberglass. What did you use to mold the bumpers in. Did you use bondo or fiberglass or a panel bond adhesive. Any advice is appriciated
Instructor
Joined: Sep 2003
Posts: 184
Likes: 0
From: boulder wa
i just bought front and rear pieces off a fella here in australia who used new ends to make fibreglass moulds. the new end are fibregalss and dont ripple or buckle and once their bonded in place there are no joins and they look great 
Thread Starter
Drifting
Joined: May 2004
Posts: 1,258
Likes: 0
From: Huntsville Alabama
I have a original 80 rear bumper that is ureathane and I am wanting to know for the people that have molded the ureathane bumpers in how did mold the ureathane to the fiberglass
Instructor
Joined: Jul 2004
Posts: 180
Likes: 0
From: Oklahoma City OK
A friend of mine molded in fiberglass bumpers
It looked great on his '77. I think he got the bumpers from Ecklers, but that was about 25 years ago. It seems to me molding urethane bumpers to a fiberglass body would be problematic. I would think the flexibility of the bumpers would eventually result in cracking around the joints. I an certainly no expert, however, and I am curious to know if this has been done successfully.
Drifting
Joined: Sep 2000
Posts: 1,616
Likes: 2
From: Round Rock, Texas, USA Texas
I've seen a couple of cars here in the past -- but I think all had aftermarket fiberglass bumpers. You might be able to search - seems the cars were being painted at the time -- there was one young lady who had a redone car with leopard print (paint) at the vents -- she had molded in bumpers -- her car was even in a magazine -- but I don't remember her name.
Melting Slicks
Joined: Dec 2000
Posts: 3,407
Likes: 2
From: Carmichael CA
Sounds like you can just attach the bumper as normal and fill in the crack with some Bondo - Fiberglass Resin. If you use all of the bolts to hold the bumper on then the bondo should hold without cracking. The resin doesn't stick to the urethane all that well, but unless someone sits on your bumper then it should be OK, especially if you apply like 10 clear coat coats...that stuff is almost as tough as iron.
