Hi Norma
I've recently got some Krytox from the UK distributor and he sent me some really useful information, I'm sure he won't mind me sharing it with you as he said he had heard from a number of EOS owners. It includes a link to another forum (not wanting to promote rival forums!!) but it has some good images on how to treat the seals. Anyway, here's the info; hope you find it useful.
Johnny
Thank you for your enquiry - we have been contacted by, and supplied, many Eos owners.
We are the official UK Distributor for DuPont Krytox lubricants.
Most found us via the 'VW Vortex' forum.
Overview
The main function of Krytox for the coupe/cabrio application is to act as a semi-permanent lubricant film to eliminate creaks originating from elastomer/panel interfaces for the roof sections, and roof mechanism linkages/location points.
In the case of the VW Eos, the majority of owners are also reporting water leaks, and our initial thought was that Krytox is not intended to address this directly.
However, having seen the entries on the various Owners Forums, and spoken with several owners, we have a better understanding of the issues.
It seems that as the vehicle is supplied, there is a possibility for 'dry' seals to become distorted when roof is closed, and these distortions may be sufficient to allow water ingress.
It is considered that treatment of the seal sections with Krytox will provide a very low friction surface, allowing panels to offer up to the seals more readily, reducing the scope for distortion.
The Industry Standard Krytox grade for anti-squeak and rattle is GPL 105 - this is the PFPE material in oil form.
The most convenient pack size is 30ml applicator bottle with fabric wick cap.
The material is also available in grease form as GPL 205 - the GPL 105 oil is thickened with microfine PTFE to provide a pure white paste.
I also attach the TDS for your information.
We would suggest that the oil is the most appropriate version for treating the relative large surface area of elastomer seal, and perhaps consider the grease for treating the roof linkages.
Key considerations
- seal material needs to be squeaky clean before application of Krytox - free of body wax, silicone etc. We use IMS as a solvent for achieving this.
- application amounts need to be minimal - avoid temptation to overapply. Be cautious of contamination onto unwanted areas such as glass and paint (very difficult to remove!!)
- the applicator bottle is quite convenient, although I find fingers the best method to apply the product. Can work well into the seals, and get into the nooks and crannies which are guaranteed to be the source of noise. Krytox is a very safe and inert material (both to operator and substrate) - does not cause seal swell or cracking.
I attach a relevant link from VWVortex below - as a US entry referring to application of Krytox to the EOS roof system.
http://forums.vwvortex.com/zerothread?id=3087297
This shows the person applying via the nozzle of the bottle, rather than the applicator cap - and to our mind, the application looks a bit heavy, but it gives a good indication of the areas for treating.
Durability
Krytox is not considered to be a 'temporary' fix.
It does not suffer water-washout, does not oxidise, and does not migrate. DuPont have carried out fluorine flame testing on treated door seal sections 4 years after application, and found comparable levels to those at time of application.
Pricing
Krytox GPL 105 applicator bottle, 30ml £18.00/30ml bottle
Krytox GPL 205 grease, 2oz £19.00/2oz tube
Both are ex stock, and prices are ex VAT, ex works.
We accept Credit Card payment (excepting Amex and Diners), our minimum order quantity is £30.00, so we would suggest you take either x2 of the bottle, or perhaps one of each bottle + grease.
We can ship these amounts in a Jiffy bag in the post - allow £3.50 for Post and Packing.
All contact information is below - please call if you need more data, or to place an order.
Best regards
Alan
Alan D Follett
Product Manager
GBR Technology Ltd
T: 0118 9820567
F: 0118 9820590
[email protected]
