We do not recommend using Racing Optic Perimeter Seal Laminated tear offs on Coated Shield (including ALL Z-20 and Z-24 Prism Shields). They can have a reaction which can potentially damage the shield or shorten the longevity of the shield. The standard non perimeter seal have no issue
Tear Off Note: If your tear offs are not allowing the photochromatic to work, it is because the tear off or adhesive is blocking the UV light. Z-Optics Tear Offs do not block UV light, allowing the photochromatic shields to work. Z Optics Tear Offs are available here: www.racetearoff.com