[A930Rocket]

Originally Posted by rfuerst911sc

This stuff is excellent . I have used on fiberglass boats , it does NOT let go !
3M marine adhesive sealant 5200

https://www.3m.com/3M/en_US/p/d/b40066983/

I was looking at this one as well and it’s on my shortlist.

Originally Posted by Bob Kontak

Just a thought. Auto body panel adhesive.

Check out the tech data sheet

https://www.3m.com/3M/en_US/p/d/b40066467/

If you buy a single two part cartridge it may not be too expensive. Skip the applicator gun is what I'm thinking. Mix by hand.

$55 on amazon
https://www.amazon.com/3M-08115-Panel-Bonding-Adhesive/dp/B000PEW4MI/ref=sr_1_2?keywords=3m+58115&qid=1678381015&sr=8-2

I just happen to have some bonding adhesive from 3M. That was on my shortlist.

Originally Posted by rockfan4

It looks like there's 4 screw holes in the mount. Couldn't you put the helmet on and run 4 3" deck screws in? That should hold it.

Haha! That really was an option back in the day with machine screws and washers but I used the supplied adhesive.