TSI Supercool 12886 warranty seal Red marker 1.8-Ounce is designed to allow a visual detection of any movement or tampering. It dries fast and adheres to All metal and other surfaces. It is designed to be effective for pan marking. It is used by both oil change and quick lubes to prevent drain plug tampering. transmission shops use it to protect warranties (high temperature resistant), and A/C technicians use it to prevent refrigerant tempering. Supercool is ISO 9001 certified for the design, manufacture, packaging and distribution of chemicals and synthetic lubricants for automotive and industrial markets.