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911Time's Porsche 991 - How to Restore Door / Roof Seals

911Time

Suzuka
Joined
25 Sep 2018
Messages
1,170
Hi Guys,

Did this job a few years back and thought other DIY'ers might be interested - especially as some of our cars are now 8 or 9 years old.

If you've noticed your door, sunroof or boot seals looking a bit dry (or sounding squeaky), then this is an easy way to restore them and potentially avoid the cost of replacement down the line.

There are various rubber treatments out there but today I'm going to focus on the 'official' one (probably re-packaged) that's available through Porsche - Part No: 000 043 305 61.

IMG-20210629-165136032-2.jpg


Admittedly, it's not cheap at c£30 from memory but it's very good and as you use so little, one 30ml bottle has seen me through two complete treatments of my sunroof, door & boot seals and there's still some left.

Tools
For this job you'll need: 'Special Lubricant', PVC gloves, kitchen roll, a couple of microfibre cloths, some glass cleaner/quick detailer and possibly a weak IPA/water mix (see below).

Difficulty
This is a very easy DIY job and requires no mechanical skills, or specialist knowledge. It just takes a bit of care & patience, plus the time to clean up afterwards.

1: First make sure the seals are clean, dry and free of any contaminants (like oil/grease) - if not you can wipe them over with a microfibre and a weak (10:1) mix of IPA/distilled water but let them dry thoroughly before applying the lube, as you want it to soak in.

2: If your car has a sunroof, then mask off the glass and protect the surrounding paintwork, as the lubricant is hard to clean off afterwards without smearing.

3: Apply a small amount of lubricant to your forefinger - use SPARINGLY, as a little goes a long way!

IMG-20210629-165541029-2.jpg


4: Apply to the seal and begin to spread evenly over the entire surface - being careful not to get it onto surrounding materials.

IMG-20210629-165628862-2.jpg


5: Pinch the seal between your thumb and forefinger to ensure maximum coverage onto the seal lip and spread each drop of lubricant as far as you can (judging your progress by the change in appearance), until the whole seal is coated.

IMG-20210629-165658510-2.jpg


6: Allow the lube time to soak in - I left mine for approx 30 mins and moved onto the other areas.

7: Once it's sat for a while, remove any excess with a piece of kitchen roll - being careful not to wipe it onto glass, carpet or other trim.

IMG-20210629-165828659-2.jpg


8: Give each seal a gentle wipe over with a microfibre, turning the cloth regularly to expose a clean area.

IMG-20210629-170109895-2.jpg


9: Remove any masking and clean any lubricant off the glass/panels or trim with a suitable glass cleaner/quick detailer etc and admire your work.

The lubricant rejuvenates the rubber, prevents squeaks and improves its appearance.

Hope that helps :)
 
This stuff is actually the best item i have in my squeaks and rattles tool kit .. followed by teflon tape and Gummi Pflege .

It can be used on most surfaces unlike Gummi which is a pure rubber replenisher and can be sticky .. Two leather panels touching and causing a squeak .. a thin smear of this on the touching parts and job done .

For the part of the seal that touches the front windows i would tend to use Rain X .. wet a cloth and smear along the top inch of the front window and down the rear .. leave to dry .. wipe onto the rubber seal that touches the glass .

Unlike This it won't cause smearing on the glass .

I use it for creaks by your ear when cornering which is a dry rubber door seal against the glass .

Its called Krytox and its a VW part .. link here ..

https://www.amazon.co.uk/genuine-VW...NDBUE/?tag=googshopuk-21&linkCode=df0&hvadid=
 
Thanks for that. I tend to use Autoglym rubber/vinyl stuff but maybe that's not as good especially if it hardens the rubber.

It's too late on my 991 door window seal as per this: https://rennlist.com/forums/991/1101982-door-window-rubber-seal-worn-torn.html

Seems like quite a big job to replace that seal. My sense is that a split in that part of the rubber is not something to worry about, maybe just trim it off?
:dont know:
 
Cut it off .. if you have no wind noise or water leak issues then its fine .. there's not much you can do other than that .

I've tried superglue on things like this in the past .. it doesn't really work i'm afraid .
 
Thanks deMort, sage. Superglue would end in tears, I'm attached to the 911 but not that close :floor:

@911Time - couldn't help notice the Houdstooth - is yours a 50th Ed? Couldn't see from your previous posts (hope the back's holding out BTW).
 
OttoOtto said:
It's too late on my 991 door window seal as per this: https://rennlist.com/forums/991/1101982-door-window-rubber-seal-worn-torn.html

Seems like quite a big job to replace that seal. My sense is that a split in that part of the rubber is not something to worry about, maybe just trim it off?
:dont know:

Oddly enough I have the same issue on my passenger door, which is rarely opened and with only 24k on the clock, I think it's pretty poor. I'm awaiting delivery of a specialist 3M glue and will upload the results - hopefully next week.

BTW: Mine isn't a 50th Anniversary model but I fitted some of the 50th Anniversary parts (forged alloys and engine grill) and had it re-trimmed in Houndstooth last year.
 

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