Window film protector spray!Simply Mask it, Spray it, Leave it, Peel it.

Mask it, spray it, leave it, peel it. Hold the aerosol up to 300mm away from the surface. Spray application via a lightweight, easy to use 400ml spray can. Once applied, Site Shield provides a barrier against detritus and other forms of debris and prevents itfrom bonding directly to glass.

eBay