||Original Equipment; When a windshield
is made, two pieces of glass are cut to shape and laid on a form with a
.030 plastic laminate between the two pieces. The form and glass are
then passed as a unit through a furnace where the glass softens and bends
to the shape of the form. Original equipment manufacturers use
forms designed to fit your car exactly. After market manufacturers
may make a form copying a purchased windshield. Small variances
creep in causing a poor fit.
||Structural Strength; Windshields are
thinner and stronger than ever before. In fact, as hard as it is to
believe, in many new cars the glass is an integral part of the roof
support system. The glass must be installed properly to insure
rollover protection. Air bags can save lives but they cannot protect
you if the windshield pushes out when the air bag inflates.
||Quality Urethane; Most urethane
products do a fine job if they used properly with the correct primers.
||Don't rush; For some reason is has
become very popular to believe that faster is better. This is
definitely not so with windshield installations. Many urethane
windshield installations can and should take two hours or more!
After the old windshield is removed the area to receive the new windshield
should be clean and dry. Any scratches or bare spots on the
pinchweld need to be primed to prevent future rusting. This primer
also needs to dry completely before the glass is installed.
||Don't rush again; After the windshield
installation is completed the vehicle should not be driven for several
hours. Urethane cure rates are affected by heat and humidity.
The published standards use 70 degrees and 50% humidity as a benchmark for
proper curing times. As temperatures and humidity drop cure times
lengthen. Cure rates drop to near zero when the temperature drops
below 40 degrees.
Please do not allow anyone to install your car's windshield outside or in
an unheated garage if the temperature is below 40 degrees.