Permatex 22071 Water Pump and Thermostat RTV Silicone Gasket, 0.5 oz., 0.5 Ounce, Blue (Pack of 6)

Customers find the RTV silicone gasket effective, particularly for water pump and billet thermostat housing applications, and appreciate its sealing capabilities in preventing leaks. The product receives positive feedback for its quality and ease of application, with one customer noting it sets up nicely in a small bead. While customers consider the price reasonable, they express concerns about the small tube size and quantity, noting it's barely enough for one water pump installation.