Mothers Protectant Large 24oz. size trigger bottle. Mothers Protectant Preserves and protects for 30 days! Mothers Protectant is a penetrating UV blocker, effective on rubber, vinyl, plastic and fiberglass. Constructed to recondition and maintain the original condition and appearance of dashboards, bumpers, trim, tires and more. Mothers Protectant isnít an oily surface-coating film. Itís an ozone and smog resisting, UV shielding penetrant ó a preservation agent that works on just about any uncoated plastic or rubber.