RTV Silicone vs Anaerobic Gasket Maker

RTV (Room Temperature Vulcanizing) silicone gasket makers cure by reacting with moisture in the air, forming a flexible, rubber-like seal. They are commonly used on flanges with larger gaps or where some flexibility is needed to absorb movement.

Anaerobic gasket makers cure in the absence of air, between two closely fitted metal surfaces. They tend to form a harder, more rigid seal and are typically used on rigid, well-machined flanges with minimal gap.

Choosing between the two usually comes down to the flange material, surface finish, gap size, and whether the joint will experience movement or thermal expansion. Sending a photo of the flange and the equipment it's on helps our team recommend a suitable option.