Mothers 05316 Protectant, Preserves and Protects Auto Interiors, Rubber, Vinyl, and Plastic from UV Rays and Harsh Elements (16 oz.. 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.