[2 Lover]

I installed after market carbon spoiler with 3M double sided tape on my 230i the day before yesterday.
I didn’t take her out from underground parking lot for maybe 36 hours after installing.
But I gotta go to work today, and parked outside and there have been heavy rain all day long today, so I am just worrying it is gonna fall off soon because it has been wet all day like 13 hours..
Do you guys have any experience like me?
Do I have to take it off and reinstall it?

[JerryW235]

Originally Posted by 2 Lover

I installed after market carbon spoiler with 3M double sided tape on my 230i the day before yesterday.
I didn’t take her out from underground parking lot for maybe 36 hours after installing.
But I gotta go to work today, and parked outside and there have been heavy rain all day long today, so I am just worrying it is gonna fall off soon because it has been wet all day like 13 hours..
Do you guys have any experience like me?
Do I have to take it off and reinstall it?

You should be fine, depending on which 3M tape was used, there are different strengths and types. As long as it was a heavy duty exterior use tape, and the surface it was attached to was clean and dry, there should not be a problem. The stronger double sided tapes are usually thinner, look more solid, black or very dark brown in color, and have a red release tape. This is usually the type used for automotive trim. Just stay away from the thicker, white tape with a white or printed release tape, that looks a little "foamy".

[Sportstick]

Tape alone is popular for attaching spoilers because it's easier and cheaper. But, it also has more potential for failure than the more secure method used by many body shops and also contemplated by BMW with this product - a tube of urethane, similar to what is used to retain windshield glass. It should be installed and "blue taped" for 24 hours with no body motion. I've only ever attached body parts like a spoiler with urethane. Imagine if a spoiler comes loose at highway speeds, about the level of the head of the guy behind you, and it's your liability.

https://www.ecstuning.com/b-genuine-...82699408866kt/

This post will likely be followed by comments that tape is fine and always worked for "them". Most of these same people will have homeowner's insurance even though their house has never burned down...yet.

[BEM-S4]

Just don't drive through a flooded street - those are always a big problem in Canada and cause massive amounts of BMW damage.

[duluthtwo]

I've never understood why these aftermarket spoiler guys havn't designed a spoiler that fits over the existing spoiler and attaches with screws

[Rony316]

OP. I installed my spoiler with 3M tape, pressed it down firmly and immediately took it out in the rain at > highway speeds. It has lasted another 4 months so far. If done properly on clean, grease free paint, it shouldn't budge

[xantdieselx]

Originally Posted by Sportstick

Tape alone is popular for attaching spoilers because it's easier and cheaper. But, it also has more potential for failure than the more secure method used by many body shops and also contemplated by BMW with this product - a tube of urethane, similar to what is used to retain windshield glass. It should be installed and "blue taped" for 24 hours with no body motion. I've only ever attached body parts like a spoiler with urethane. Imagine if a spoiler comes loose at highway speeds, about the level of the head of the guy behind you, and it's your liability.

https://www.ecstuning.com/b-genuine-...82699408866kt/

This post will likely be followed by comments that tape is fine and always worked for "them". Most of these same people will have homeowner's insurance even though their house has never burned down...yet.

Isn't the OEM spoiler taped on from the factory?

[Sportstick]

Originally Posted by xantdieselx

Isn't the OEM spoiler taped on from the factory?

Having spent a career in an automaker, the facilities/environment/process in an assembly plant cannot be duplicated in your garage/driveway. The temperature of the receiving surface as well as the part to be applied, the surface preparation, and amount and duration and constancy of pressure across the part, the receptivity of the "fresh" paint to bind with the adhesive, are all specified and controlled. Of course, I can also remember when we had to contain a yardfull of vehicles at the plant (and locate/halt others which were in shipping) because the adhesive on the bodyside molding was improperly managed and the moldings were peeling away from the surface. For that failure, at least they were softer parts located on the lower body side. For a rear deck spoiler in the aftermarket, the urethane is far more robust, although it does incur more cost and is a more complex process. The question is the quality of the result one wishes to achieve.

[Rayscott]

Originally Posted by BEM-S4

Just don't drive through a flooded street - those are always a big problem in Canada and cause massive amounts of BMW damage.

[xantdieselx]

Originally Posted by Sportstick

Having spent a career in an automaker, the facilities/environment/process in an assembly plant cannot be duplicated in your garage/driveway. The temperature of the receiving surface as well as the part to be applied, the surface preparation, and amount and duration and constancy of pressure across the part, the receptivity of the "fresh" paint to bind with the adhesive, are all specified and controlled. Of course, I can also remember when we had to contain a yardfull of vehicles at the plant (and locate/halt others which were in shipping) because the adhesive on the bodyside molding was improperly managed and the moldings were peeling away from the surface. For that failure, at least they were softer parts located on the lower body side. For a rear deck spoiler in the aftermarket, the urethane is far more robust, although it does incur more cost and is a more complex process. The question is the quality of the result one wishes to achieve.

So the answer is yes. 3M makes an adhesion promoter wipe specifically for their double sided tape which is for use with plastic parts.

https://lmr.com/item/3M-06396K/3M-Ad...ble-Sided-Tape

[Sportstick]

Originally Posted by xantdieselx

So the answer is yes. 3M makes an adhesion promoter wipe specifically for their double sided tape which is for use with plastic parts.

https://lmr.com/item/3M-06396K/3M-Ad...ble-Sided-Tape

The simple answer is yes, but there are more factors to consider, as noted above...part and surface temperature, degree and duration of pressure. One could say that paint is applied in the plant with a spray, but a can of aftermarket spray paint doesn't quite yield the same result in the driveway, even though they are both sprays. The conditions in the plant are the result of significant testing and validation, and then tight control to achieve a uniform process.

There really is no debate here. If one believes tape is "good enough", that is a personal risk assessment decision we are all free to make, hopefully being fully informed. But, if someone suggests tape has the equivalent robustness as an adhesive as urethane, that would be incorrect.