Sign In

A Look at the Standards of Sealants

Last updated 6 years ago

With new developments in automotive technology, professional windshield repairs are now a simple and inexpensive procedure.  However, a service is only as good as the products it uses, which is why it is important to be mindful of what differentiates a good auto glass sealant from a bad one.  Take a look below to learn about different sealant standards and how they can affect your windshield repair:

  • How Windshields Work
    Windshields are made of laminated glass, which is comprised of two sheets of tempered glass bonded to a polymer layer, usually polyvinyl butyral (PVB).  This interlayer is designed to increase the strength of the glass by spreading out impacts over a larger surface area and by reducing penetrative force in the event of an impact.  It also blocks UV rays and prevents shards of glass from breaking off and potentially injuring a vehicle’s occupants.
  • The Interlayer
    The PVB layer is mechanically bonded to the glass through extreme pressure and heat; this allows for an extremely strong bond between the two panes of glass with minimal discoloration or imperfections.  It is important to be aware that while PVB is the material most commonly used for laminated glass, other compounds such as ethylene vinyl acetate (EVA) and thermoplastic polyurethane (TPU) are also used as interlayer materials.  When repairing cracks or chips on auto glass, it is crucial to use the appropriate sealant.
    The National Glass Association and National Windshield Repair Association have collaboratively approved the Repair of Laminated Automotive Glass Repair Standard (ROLAGS®).  Not all automotive glass is created the same, and neither are all glass sealants.  In order to provide the best possible repair, an acceptable auto glass sealant must meet AS/NZS 2366.2:1999 standards, ensuring that the resin will provide optimal clarity, color, and refractivity.

Glass on the Move has been providing Oakland, Berkeley, Hayward, and the rest of the Bay Area with award-winning auto glass repair and replacement services for over 33 years.  We provide same-day, mobile response to Alameda and Contra Costa counties free of charge. Call (510) 338-4791 to learn more about our exceptional service.


  • Loading comments... Spinner
Do you like Auto Glass on the Move?

Auto Glass Mobile Service Repair


  • Recent Posts
    • Loading posts... Spinner
  • View All
  • Recent Comments
    • Loading comments... Spinner
  • Related Links
  • Popular Tags
    • Loading tags... Spinner