RTV & Silicone Sealers & Gasket Makers

Seal it right the first time with premium RTV silicone sealers and gasket makers from Phantom Motorsports. RTV (Room Temperature Vulcanizing) silicone is the go-to solution for creating instant, flexible, leak-proof gaskets in engines, transmissions, differentials, and more. Whether you’re assembling a high-performance build or handling routine maintenance, RTV silicone ensures reliable, oil- and coolant-resistant seals that stand up to heat, vibration, and pressure—mile after mile.

At Phantom Motorsports, you’ll find a complete selection of RTV silicone sealers and gasket makers in a variety of formulas and colors, including high-heat, sensor-safe, and specialty blends for specific applications. Easy to apply and cure without shrinkage, our RTV products are trusted by DIYers and pros for their toughness, durability, and versatility. Get superior sealing power for any repair or upgrade and protect your work from leaks and failures.

FAQ

What is RTV silicone and how is it used?
RTV silicone is a room-temperature curing sealant used to create flexible, custom gaskets on engine, transmission, differential, or other automotive flanges and components.

What are the benefits of using RTV over traditional gaskets?
RTV silicone forms a perfect fit and fills surface imperfections, providing leak-proof seals in complex shapes or irregular flanges. It’s resistant to oil, coolant, and most automotive fluids.

What types of RTV silicone do you offer?
We stock high-heat (red), sensor-safe (blue/gray), oil-resistant (black), and specialty formulas—each designed for different temperatures, surfaces, or chemical exposures.

How do I apply RTV silicone sealer or gasket maker?
Clean and dry both surfaces, apply a continuous bead, assemble parts promptly, and allow time to cure. Always follow the product’s instructions for best results.

How long does RTV silicone take to cure?
Most RTV sealers skin over in 15–30 minutes and fully cure within 24 hours. Curing time may vary with humidity and product type.

Is RTV silicone safe for use with oxygen sensors and modern electronics?
Sensor-safe RTV formulas are specifically designed to be free of chemicals that could harm O2 sensors or other engine management components.

Can you use RTV on factory gaskets or only for gasket replacement?
RTV can be used to supplement factory gaskets for added sealing, but never use it too thick or in excess—excess can squeeze into passages and cause problems.

What if my RTV silicone sealer arrives dried out, leaking, or damaged?
Customer satisfaction is our priority. If your RTV product arrives unusable, contact us within 7 days for a prompt replacement, exchange, or refund.