This is what I used when 2x4 flew at my side mirror at highway speeds when a car in front of me kicked it up.
Comes with adhesive strips to stick on, been on for years, goes thru car washes all the time and off roads, no problems.
Amazon.com: Driver Side Mirror Glass, Toyota 4Runner : Everything Else
__________________
2001 Limited 4WD - 346+K - SunfireRed\Thunder Cloud; - 265/75/16 Michelin A/T2s - Fat Pat's 1.5" BL - StopTech ANGLED rotors - In series 699 trans cooler, New Yota1 transmission, All new OEM suspension front to rear.