Mitch,

Thanks for the question!

We do not recommend leaving your kit in your vehicle during extreme temperatures overnight. Leaving your kit in your vehicle during the day if you are going from job to job should not be a problem however.

There are many different pieces in any windshield repair kit that have different effects from extreme temperatures and temperature changes. In the ultraviolet lights, you can get condensation on the metal pieces from temperature cycling. The same is true for resin bottles. The suction cups stick better and the batteries in the drill and ultraviolet lights work better, when they are warm.

With our resins, they will not "go bad" if accidentally left in sub-freezing temperatures a few times, but if this happens, make sure and warm the resin and the glass to optimum temperatures before repairing.

Hope this helps!

[b]Jeff Higgins
Delta Kits, Inc.
jhiggins@deltakits.com
http://www.deltakits.com</p>