Teflon Tape Around a 993 Windscreen

[Glassman]

Teflon, or 'helicopter' tape is used allegedly to negate the noise of a creaking 993 windscreen (sometimes used on 996 models too).

It serves no purpose other than to trap water and potentially harbour a damp and moist environment for a nest of tin worms to thrive in.



Snake oil.

I've removed and refitted countless creaking 993 windscreens, mostly to investigate a creaking noise. Most have had Teflon tape on them. Get rid.



If you want a creak-free 993 windscreen, have it fitted properly.

[Orangecurry]

As I understand it, the factory-fitted strip of teflon tape is to prevent the 'hard' rubber/plastic outer trim-strip from rubbing directly against the paint as the car flexes.

You can just see the factory tape here:



New trim strips also have a soft/felt underside to minimise this friction, but the felt wears away over time.

(If you look under the trim on a 993, there are areas where you can see the damage in the paint caused by the relative movement of the trim. Especially the rear aperture.)

The factory fitted strip of teflon is a 'good' thing. Obviously I don't know (from your photos) what was under that particular 993's trim, but following TSB 9501 worked for me. Stiffens-up the car as well

http://www.pcarworkshop.com/images/c/cb/993_paint_...

[Glassman]

You're the chap who used a building grade "low modulus, non corrosive, silicone neutral" 'special sealant' from Travis Perkins to 'seal' your front windscreen, right?

[cd1957]

Hi Glassman, the clear teflon tape was a Porsche Technical fix for creaking screens,even on brand new 993,you had to use 3m clear tape,only on the contact area of seal to the body.

Chris

[Orangecurry]

Glassman said:

You're the chap who used a building grade "low modulus, non corrosive, silicone neutral" 'special sealant' from Travis Perkins to 'seal' your front windscreen, right?

Oh how we laughed.

If you mean did I follow Porsche TSB 9501, and substitute a Dow Corning 791 (i.e. modern sealant designed for glazing/metal applications) for the Bostik 6050, then yes

Thanks to the TSB 9501, there is now nowhere for water to sit in the lower windscreen corners against the metal and trapped under the trim.

HTH

Here is the link to Porsche's TSB 9501 again, in case anyone missed it.

http://www.pcarworkshop.com/images/c/cb/993_paint_...

Edited by Orangecurry on Wednesday 16th April 11:50

[Glassman]

Orangecurry said:

Oh how we laughed.

If you mean did I follow Porsche TSB 9501, and substitute a Dow Corning 791 (i.e. modern sealant designed for glazing/metal applications) for the Bostik 6050, then yes

Thanks to the TSB 9501, there is now nowhere for water to sit in the lower windscreen corners against the metal and trapped under the trim.

HTH

Here is the link to Porsche's TSB 9501 again, in case anyone missed it.

http://www.pcarworkshop.com/images/c/cb/993_paint_...

...and I'll say again, there are much better - far more suitable - automotive grade products available for the job.

Getting back to the subject matter, TSB 9501 mentions nothing of Teflon tape.

[roygrant4]

I've just had the windscreen out to repair the start of tin word so would be interested to know more. Obviously the area on mine is nice and dry at the moment so would be an ideal time to fill the gap. I did a search for the Bostik 6050 but didn't find a lot, does anyone know where to get hold of this sealant or an equivilent, apart from B & Q !!
Thanks

[Glassman]

roygrant4 said:

I've just had the windscreen out to repair the start of tin word so would be interested to know more. Obviously the area on mine is nice and dry at the moment so would be an ideal time to fill the gap. I did a search for the Bostik 6050 but didn't find a lot, does anyone know where to get hold of this sealant or an equivilent, apart from B & Q !!
Thanks

Where are you/the car based?

[Orangecurry]

Glassman said:

...and I'll say again, there are much better - far more suitable - automotive grade products available for the job.

Excellent - could you list them for our readers' future use? Oh hang on, I'm guessing they are a trade secret?

Glassman said:

Getting back to the subject matter, TSB 9501 mentions nothing of Teflon tape.

There are no flies on you. I mentioned 9501 as following the TSB helps to reduce the creaking, as the screen/aperture-edges are now bonded together and so move less relative to one another.

[Glassman]

Orangecurry said:

following the TSB helps to reduce the creaking

A correctly fitted screen will not creak.

[roygrant4]

I'm based between Oxford and Cheltenham

[silver7]

I would like to know the recommended product glassman please? It would be useful to all 993 owners.

[roygrant4]

Any further information available for the sealant Mr glassman ?

[Wozy68]

I'd guess it's a trade secret you, and quite rightly so.