I am pretty sure that when I had tinted glass installed for me by Safelite
Autoglass it was PPG.  It was around $150 and came with a new seal.  Guy came
to our place and did the Vanagon windshield and a Nissan Maxima (my brothers)
in about 30 mins.  I had this done for a customer and have never heard of it
leaking (it has been a couple of years now and the customer was just here a
few months ago).  Why do it yourself when you can get it done professionally,
quickly, and cheaply this way?  

Thanks,
Ken Wilford
John 3:16
www.vanagain.com
Phone: (856)-765-1583
Fax: (856)-327-2242