Molding Urethane Parts

[BurnBarfield]

I was wondering if it is possible to mold urethane stuff. I prefer the 97-99 style and did a photoshop of the kit molded on, and it looks really good.

If it is possible, how is it different than fiberglass and what products do you use?

 

[Chaddycakes21]

I remember hearing that its not possible, but i could be wrong hopefully someone who knows more about this will get with ya soon, because if it is possible i got a urethane body kit that id love to have molded as well.

 

[sk8shorty01]

Molding a urethane kit is much more difficult than a fiberglass kit. First You can only use very small pieces of matting/resin. You can use this stuff called SMC panel adhesive. It comes in a tin can and the liquid is kind of thick and dark grey. This is very flexible and will let the body kit flex how you need it too. You could use a very small amount of matting/resin on the crease for strength. If you do this make sure you build some brackets to the bottom corners of the kit to take out some of the wobble. The only thing you have to remember is paint is not flexible so when the body kit flexes the paint will crack if you are not careful.

 

[Injected]

It is very possible to mold urethane parts and it has been done many-o-times. Someone good with plastic welding is would be good. There are urethane fillers (like plastic fillers aka bondo) that you can use. Molding a flexible piece like the front bumper to something that doesn't give, like a CF lip, fenders, or canards is not a good idea.

What front/PS idea did you have... Please post.

 

[sk8shorty01]

You can mold the flexible front end to the metal fenders without a problem, you just need to use something like the SMC panel adhesive i was talking about. This type of "fiberglass" mixture is flexible and is what is used to repair cars such as saturns which have full plastic body panels. The flex versus non flex combo should not be a problem if done correctly, of course with the plastic welding it would but not the adhesive im talking about. After that you can use a flexible epoxy to finish the job and you would be set.