Unfortunately, some window manufacturers do void the glass warranty when window film is applied. However, there is good news. Customers choosing any of our Hüper Optik® window films receive a manufacturer’s warranty that warrants against failure of the glass for seal failure for a period of thirty-six months if covered by the original seal unit manufacturer. Hüper Optik® Window Films also warrants against thermal shock fracture for a period of sixty months for up to $500.00 per window.