Collection: Auto - RTV Silicone

Ensure a permanent, leak-free seal on your engine and drivetrain components with our selection of Auto RTV Siliconegear. At DIY Customs, we provide high-durability sensor-safe RTV, specialized high-temp red and copper silicone, durable gear oil-resistant grey sealants, and heavy-duty black weatherstripping adhesives designed for a perfect fit in valve covers, oil pans, and differential housings. Whether you are sealing a specialized thermostat housing to withstand extreme cooling pressures, seeking a non-corrosive sealant for electronic sensors, or outfitting your shop with specialized anaerobic gasket makers for machined flanges, our professional-grade adhesives offer the chemical resistance and flexibility you need at unbeatable prices. From specialized Ultra-series tubes to direct-fit cartridge sizes for popular caulking guns, we carry the essential gear for every sealing project. Don't see the specific temperature rating (up to 700°F+), cure time, or specialized sealant type (Black / Blue / Grey / Red) for your repair? Hit the live chat or call 412-882-8346—we can special order and drop-ship exactly what you are looking for directly to your doorstep!