the AGS Sil-Glyde Silicone Brake Caliper Lubricant (BK-4) has been carefully formulated to be compatible with all kinds of rubber, ensuring it won't degrade seals or boots. This makes it an ideal choice for mechanics and vehicle owners who want a reliable and versatile product for their brake system maintenance. Secondly, this lubricant excels in high-temperature environments, maintaining its effectiveness even under severe operating conditions. The AGS Sil-Glyde Silicone Brake Caliper Lubricant (BK-4) is rated for operation from -20F to 600F, making it suitable for a wide range of vehicles and driving conditions.