Expert: Octavio Torres - 9/11/2010

Question
My rear view mirror fell off my windshield and I tried to fix it by buying a rear view mirror repair kit, but the button did not attach to the windshield.  So I looked on the back of the repair kit and it read "not recommended for plastic buttons" My question is what is recommended for plastic buttons and would krazy glue work?

Answer
Hi Tara, plastics are low energy substrates to accept any adhesives,in fact adhesives rarely work well in most plastics. Do not waste your time trying to join any plastic to a glass windshield (although adhesives are plastic resins)the only viable systems are metal-glass interfaces plus a primer and lockquick from loctite for this application.thanks