BMW Shark Fin Antenna Cover Mount

bzellers21 · 10-23-2023, 02:17 PM

I recently started getting a leak from my Shark Fin Antenna into the interior of my car. I need to replace the seal and seal the cover down again. Has anyone used any seal/tapes that worked for this? Has to be completely waterproof so that the Telecoms module underneath does not get ruined.

Billfitz · 10-23-2023, 04:56 PM

The factory uses window glass adhesive. It's a two part material. I'd use 3M double sided tape.

bzellers21 · 10-23-2023, 05:37 PM

The problem with the 3M double sided tape is that it is almost impossible to curve it the way that the fin edges curve. I fear that it won't properly seal. I am wondering if anyone here has used any sealants that worked well to keep the water out.

Billfitz · 10-23-2023, 09:00 PM

Thinking about it if mine leaked I wouldn't pull it. Going by my Bentley manual that process is pretty daunting. I'd use a thin bead of UV cure glue around the joint.

Dom147 · 10-27-2023, 10:16 AM

I've used 3m double sided tape before and leaking isn't the issue. The issue for me was that it wasn't tall enough. I can't quite remember what I did to solve that but I'm 90% sure I ended up stacking the tape and it never fell off when driving 110+mph or through automatic car washes.

10-23-2023, 02:17 PM	#1
bzellers21 Registered 0 Rep 2 Posts Drives: BMW 328i Join Date: Oct 2023 Location: Edmond Oklahoma iTrader: (0)	BMW Shark Fin Antenna Cover Mount I recently started getting a leak from my Shark Fin Antenna into the interior of my car. I need to replace the seal and seal the cover down again. Has anyone used any seal/tapes that worked for this? Has to be completely waterproof so that the Telecoms module underneath does not get ruined.
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10-23-2023, 04:56 PM	#2
Billfitz Lieutenant General 8245 Rep 16,086 Posts Drives: '15 328iX GT Join Date: Jan 2015 Location: New Hampshire iTrader: (0)	The factory uses window glass adhesive. It's a two part material. I'd use 3M double sided tape.
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10-23-2023, 05:37 PM	#3
bzellers21 Registered 0 Rep 2 Posts Drives: BMW 328i Join Date: Oct 2023 Location: Edmond Oklahoma iTrader: (0)	The problem with the 3M double sided tape is that it is almost impossible to curve it the way that the fin edges curve. I fear that it won't properly seal. I am wondering if anyone here has used any sealants that worked well to keep the water out.
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10-23-2023, 09:00 PM	#4
Billfitz Lieutenant General 8245 Rep 16,086 Posts Drives: '15 328iX GT Join Date: Jan 2015 Location: New Hampshire iTrader: (0)	Thinking about it if mine leaked I wouldn't pull it. Going by my Bentley manual that process is pretty daunting. I'd use a thin bead of UV cure glue around the joint.
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10-27-2023, 10:16 AM	#5
Dom147 Second Lieutenant 91 Rep 249 Posts Drives: 2014 BMW 228i, 2017 BMW M240i Join Date: Apr 2021 Location: Northern Virginia iTrader: (1) Garage List 2017 BMW M240i [0.00]	I've used 3m double sided tape before and leaking isn't the issue. The issue for me was that it wasn't tall enough. I can't quite remember what I did to solve that but I'm 90% sure I ended up stacking the tape and it never fell off when driving 110+mph or through automatic car washes.
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