Community Forums

AdamB · 02-04-2013, 09:05 PM

Getting ready to re-caulk the front windshield to stop the leaks and wind noise & figured I'd get some clarification on the correct procedure.

From reading all the posts here, looks like I need to do the following:

clean everything thoroughly
remove all the previous caulking
clean the surfaces again with acetone
apply painters tape to keep the Sikaflex from getting on the body
Apply Sikaflex 200 using a caulk gun
Let it cure for a day or two
Remove tape and enjoy!

Here's my questions

How many tubes of Sikaflex should I purchase?
Is this product so thick that I should consider using an air powered cualk gun?

Thanks in advance! Looking forward to a great 2013 RV season!

wa8yxm · 02-05-2013, 07:26 AM

Alas the answer depends on how thick you apply it but Murphy has the real answer.

You will need N+1,, Where N is the number you buy.

Wish I could be of more help but on a motor home windshield I would not even consider a DIY attempt. I want someone who has the proper power gear (porta power) to handle that hunk of glass.

Cbones · 02-05-2013, 08:16 AM

When I had mine done at the factory (Discovery one piece) they used approximately 6 tubes, and the had a special heater to heat up the tubes to make the Sika flow easier. The also used an air powered gun to apply the caulk. Keep in mind that was for a replacement of the windshield not a reseal. Additionally they used Pro-Seal cleaner to prep the surface. Acetone may start to remove the paint if you are not careful. This may be one of those jobs best left to a professional.

rlyons · 02-05-2013, 09:29 AM

I take it you are going to attempt to reseal it by chaulking it on the outside? If so you are only going to mask the real problem which will be rust. The windshield will crack sooner or later due to the rust pushing on the glass. If anything I would isolate the point of the leak and add some sealant to that point only. If you seal the entire windshield by filling the groove around it a future windshield replacement will be very difficult if not impossible. No glass shop will touch it.