This is mainly for those who have a BYS spoiler on their S. It installed fine, and looks great as expected, but I am concerned with water leaking into the trunk through the bolt holes and the other rectangle shaped hole int he trunk lid that is under the spoiler. What, if anything did you guys use to stop water from getting in? Thanks.

 

I don't have such a spoiler, but I do know a way to seal out rain and car wash water. Use a product called "Marine Goop" available at Home Depot on the nuts and attachments inside the turnk. Just coat the bolts and nuts where they meet the underside of your trunk lid, and you should be OK.

Had you asked this question before installing the spoiler, I would have advised you to seal the holes in the trunk around the bolts with Marine Goop on the topside of the trunk, for a first class sealing job. But if you don't want to unbolt the spoiler to do this, coating the nuts and bolts where they contact the underside should be OK

Thanks,
Richard

 

Thanks, I will go to home depot to check that stuff out. I will probably unbolt it and make sure it is sealed good before putting it back on.

 

I would get some of that rubbery/foamy strip stuff, preferably with one sticky side, and stick that all along the leading edge and sides of the spoiler, then attach it to the car. It would create a water tight seal along the front and sides of the spoiler, so water would be a non issue, plus the spoiler will come off the car with 0 fuss

 

Yeah, this Marine Goop stuff works well. An adult daughter had an old house, and one of her toilet stools was leaking on the floor where the water tank bolts onto the "potty" portion of the stool. I looked at the bolt, and it was rusted and corroded so badly that it would have been a major job to remove it. I simply turned the water off to the toilet, drained and dried the tank, and coated the bolt attachment to the tank with Marine Goop. Leak stopped. For years. Even though the bolt joilt with the tank was constantly exposed to a tank full of water. She sold the house much later, and the house inspector said nothing.

BTW, Marine Goop peels off painted surfaces with little effort, so if you get some on the top of your trunk lid, no big deal.

Thanks,
Richard

 

Marine Goop is a contact adhesive/sealant. It is a decent product but not ideal for your application.
I would use a 3M product called 5200 which is a sealant/adhesive. Back when I built yachts for Hatteras that is what we, and most other yacht builders used as the sealing compound for all the hull/deck joints, as well as all below-the-waterline fixtures and through-hulls. We used to call it fifty-two-ZILLION, rather than fifty-two-hundred, since it was just so damn good at it's job. One thing, it's reaslly easy to clean up before it dries (4-24 hours), afterwards, it's there for good.
You could also check with you local body shop to see what they recommend.
Cheers,
Mike

 

I've seen the BYS spoiler put scratches down the to base metal of the trunk on two different cars. Watch out.

 

Well i just installed mine also i just used some double sided tape on the edges thats were it can sometimes rub. As far as water it has been raining alot here in socal and not one drip in my trunk so you are safe.

 

Where and how much did you get the BYS if you dont mind me asking?

 

Nooo !!! with 5200 you will be removing sheet metal before anything else comes off...5200 is a adhesive and one of the best (yes it is a sealer also). When I hung around the boat yards the fiberglass would come off prior to the part separating. I could see 5200 if you wanted to glue the wing on with no bolts, but since all you want to do is seal the bolt holes, any silicone sealer will do that. Marine goo is fine.