What is the best adhesive for repairing cracks in the rubber wrap-around spoilers?

 

Ive seen the rubber spoilers be rapaired and painted and less than a month later they warped and the paint cracked off on a large area. I dont know how bad the damage is on yours but i couldnt reuse mine. If you want a spolier to last your best bet would be to get a fiberglass one

 

i had a rubber wrap around wit the rips and i fixed it up with bondo looked perfect till i put it on the hatch damn thing was warped wat a waste of money go fiberglass

 

ok, So bondo doesn't work, no surprise there, it's not meant for rubber now is it? There has to be a sandable flexible filler/epoxy meant for rubber(flexible) application for those of us that don't have $400 for a damn spoiler.

 

Any fix is temporary at best. GM f'd up using that foam crap.

 

The only problem is that if your spoiler is cracked it's also rotting from the inside out. Mine didn't look that bad at all, there were no cracks or anything in it when I took it off. The paint was just cracked all over the place but the actual rubber was in one piece. When I unbolted it I was greeted to a ton of rust inside the thing. The metal frame that holds it together was basically gone as were the threads for the bolts.

It's not worth it to invest a bunch of time in fixing the stocker and then spend the money to paint it because even if it doesn't crack again it will still continue to rot from the inside out.

Also, rubber dry rots. The problem will only get worse with time. Sure you could come up with a temporary fix, but it's just that - temporary. Fiberglass is the best alternative aside from shaving the spoiler completely. I didn't like the price tag of the glass spoiler either but when I realized that I could do it once the 'right' way or do it the fast/cheap way and then have to do it again in a few months/years I chose to go fiberglass.

This coming from a college kid I know about not having a lot of spending money.

 

I don't know if it is sandable, but when mine cracked open, I just wanted to plug the openings to keep the water out. I tried a couple of things, one must have expanded too much in the summer sun and broke the opening further. I then tried Permatesx black silicone adheasive sealant # 16B. It does not force the crack open further. I only have mine sealed for now. My next step was to be to use a razor blade and shave it smooth. It's not a repair, but it seals it up and it looks better.

 

its cracking due to rust, happend to mine.....please go out and buy a fiberglass one, best bet.

 

Even if the internal structure was made of plastic or even carbon fiber or some other crazy composite the rubber would still crack because, well, it's rubber. It dry rots in the elements, especially after 12+ years of being out in them. If I had to guess I would say that it’s the other way around – the rust forms as a result of the cracks. The metal skeleton is pretty well sealed off from the outside until the rubber cracks and lets water get in.

Either way, the end result is a dead spoiler so it’s not like it really matters

 

I know that napa sells this 2 part epoxy that is for a urathane bumper. I used that on my front. the stuff just bends. I had it on a bondo scraper and I could not get it off. you could bend the scraper all over the place. you actually have to sand the stuff down. it stinks, it spells like someone is getting a perm but it works great. its like 22 bux or so.