OK, I know some will flame me, but ended up with an ill fitting rear spoiler. You'll see in the pic the gap I tried to fill with some rubber stripping. The gap runs across the full length across the rear deck.
I'm curious if there is a caulking or something else I could use to fill this gap?

Thanks...

 

Is the gap like that on both sides? If you centered it more would it close up enough? Or is the issue that it just isn't pulled into the car far enough?

 

Yeah its across the whole length of the spoiler, little wider both sides like the pic but also along the length of the back bumper. Its already attached so no way to move, but its centered as best as can.
I was thinking an auto seam sealer but want to see if experts had a better idea...

Thanks for the reply...

 

That kind of sucks. Aftermarket part fitment is usually not 100% and some (sometimes a LOT) of pre-fitting and custom work is needed to achieve a 100% fit. You're sure (like Kanvasman suggested) ...it's fully pushed forward (fitted)? Otherwise, I don't have a lot of good ideas. Perhaps thicker weatherstrip? Or put a backing and lay some bondo on there and sculpt it with your thumb (and paint it). That's not a good idea either. Ideally if there was something more rigid you could paint body-color, that would mask the filler. There's a whole bunch of weatherstrip examples on Amazon (do a search). Hopefully someone more creative than me drops better ideas.

The best thing (obviously) is to deal with it when new. Do whatever cutting, pasting, 'sculping' and re-glassing, as needed, to achieve as good of a fit possible. Sometimes the adjustments are easy, sometimes ya have to do a LOT of work and cutting and re-doing of the part to achieve a great fit. And THEN do the bodywork & painting. Unfortunately a shop would charge a hefty amount for that kind of custom work. But not necessarily if the solution were a couple cuts here and there. Always custom-fit to the car when ya can.

That would be the other option.... remove it, strip the paint off, and cut/grind/re-fit as necessary. Then repaint. If the OP knows how to do glass work, paint and bodywork, that would be the best way to get a perfect fit...forever. But it's going to be a fair amt of work.

Otherwise hopefully someone else has a better idea. Maybe some thicker weatherstrip?? You might go on youtube and look for some videos.. I bet there are plenty of ideas out there. Good luck. If you find a gem, come back and share the good-idea with us

 

You might try the fender welting that is used on the early VW bugs and Super beetles.it is used between the body and the fenders. The welting is round with a flat tab attached to it and is fairly flexible. Where need be you pie cut the flat tab to help it lay down. A dab of weather strip adhesive on the flat tab could help also.

 

Thanks for the suggestions....

 

I will throw one more thought out to you. Not seeing the spoiler or how it is attached, I will make an assumption the it has bolts going through the fiberglass into thecar. Can you remove those bolts from the spoiler? If you can then try doing that and hold the spoiler up to the car. How does it fit?
When I fitted a fiberglass bumper onto my 78 C3 it took some time to get the holes lined up. If you were to measure the distance at the end of each bolt and then try to push the bumper in place, it would not work. It would go in to a certain point and then you could not push it in any further. The issue was the bolts on the corners where there is a curve, were preventing the bumper from going all the way in. The distance between the bolts at their ends was different than the distance between the bolts at the bumper edge itself because of the curve. As if they were flared out. I really am having a hard time describing this but I ended up having to elongate the holes on the corners so that the bumper would slide in place, which it eventually did. Maybe whoever mounted the spoiler just marked where each bolt was, not taking into account that the distances between the bolts changes ( just a little) as the curves get close to the car. Maybe just go back to the car, loosen everything up and then, starting at the center, try and push the spoiler in place. As it gets tighter, try elongating ( side to side, not up and down) those holes, one at a time, and see if you can get it any closer. Sorry I can't explain this any better, but this is perfectly clear in my mind!!!

 

Thanks Kan, its attached with 3M tape...