Bedding in a new windshield - what to use?

That is what makes it still worth to be a member here, though sometimes the lunatics have the majority. (good luck not here)

Regards
Richard

 

I am very much against using silicone to anything but cleaning show car tyres. It usually works on the places it's used but it is a ******* to remove and nothing really sticks to it afterwards. The recipe from post #7 sounds like a winner.

Another are the automotive windshield adhesives, I've seen those used (my own car) and they sure work well, as you can hit the roads only half an hour after installation (one hour for airbag cars, Würth product).

Lurvio

 

On another thread 5200 proved to be problematic, so I steered the TO to this thread from:
http://www.boatdesign.net/forums/boat-building/i-need-solution-developing-problem-33199.html

 

The Würth stuff is excellent and as far as I am aware, not to beat in this application.
But not thought to be used in marine environment. It adds to the entire stiffness of the coach body and serves many purposes, but it is not as flexible as it has to be on a boat (todays cars flex less than boats), and does not stand extreme UV and saltwater attacks to the same extend as sika. It is just not designed for that use, as several other sika products too.

Regards
Richard

 

There it is, thanks again Apex, I was wondering about the UV resistance of the Sika. Appreciate the feedback from all and I'll be sure to avoid alcohol in the prep.


MIA

 

take a look here,
Also some of the sika we use fails after about 6-7 years in our sun of course you dont find this out until the leak starts
i would really try to find out from these companies which one they did use in the link
http://www.boatdesign.net/forums/boat-building/i-need-solution-developing-problem-33199.html

 

MIA

the recommended Sika 206 Primer and Sikaflex 292 bedding does not fail after some 6 or 7 years, be sure.

Regards
Richard

 

http://www.fixtech.com.au/ MSP 190. Too easy

 

That means you cannot drink while you work

Sikaflex does have different properties than silicone. While there is a silicone for every job, sikaflex is almost a one stop. It becomes very tough when cured, if you use the wrong type of silicone you may have either a softer more rubbery seal and you may not get as good a bond with the sealing surface as you would expect.

If sikaflex is not available I would suggest you test the silicone on the surfaces to avoid disappointment.

There are other silicone / sikaflex type of sealants made by a veriety of manufactures. I recently got such a tube from a friend, and boy, does this stuff stick and is it tough !

 

I forgot to mention - I'm almost sure you can paint sikaflex, but you cannot paint silicone.

 

....with respect fellas, the Sika 292 will fail in tropical sun in the predicted time... as stated, I have worked with it in Sydney and Brisbane for as long as it has been available (over 20 years for sure), and it WILL fail in hot sunny conditions.

The Fixtech products are (or were for sure) made in Germany and have been better for the UV so far, but I have only used them for about 8 to 10 years so far.

Dow Corning 732 RTV is a silicone made to do the job if anyone is interested in a silicone type solution instead of a polyurethane.

Glass will not expand anywhere near as much as acrylics of polycarbonates, so finer tolerances can be used.

 

To the best of my knowledge there is no manufacturer called Fixtech.
From a certificate on their website I learned that the product origin is Saba in Holland.
A small chemical company with production facilities in "Dinxperlo" near the German border. The product line is much larger than the plant could possibly support, so part of it will come from other sources.
But they also do actual manufacturing there: there is a fire report from June 11 when a reactor vessel with 600 kg manganese dioxide blew up.

Around Saba there is a ring of small companies, all in the same glue and kit business, each operating under different brand names.

 

I'm glad I asked the original question. I've had a chance to read some of the documents on Sika 206 and 292. It's interesting......woosh might be right about the UV degradation but according to Sika it's a cosmetic issue. They say that the surface of the 292 can check a bit over time but that the cosmetic change does not effect the performance of the product. They also recommend a UV shielding tape for application to window glass to, well......shield the 292 from the damaging effects of the sun.

I don't know how others care for their boats but I've always liked the idea of a cover over the windshield when the boat is docked. That should mitigate any UV issues.

Besides, I'm in my mid 50's and I am having some problems with me degrading from the effects of the sun. Pre cancerous skin problems, etc. I'll bet that I'll degrade faster from the sun than the 292!

I'll let you know.

Thanks again Apex and CDK for the direction. I can get both products here in the US.

MIA

 

Well, the surface gets grey and can check to some extend, thats true, but it is maybe 1/4 of a mm we are talking, not worth to mention.
The structural strength is not affected.

Regards
Richard

 

Take a look at what cumin does to melanoma cells by triggering the lysosomes within the cells. http://www.raysahelian.com/cumin.html