Replacement Manufactured Fron High-Density Cork/Rubber Blend Material A Black Latex Rubber Coating Is Applied To The Outside To Seal Flange Irregulariaties Creates A Positive Seal By Controlled Swelling When Exposed To Hot Engine Oil Let's face it. Small blocks with cork valve cover gaskets will leak oil. Mr. Gasket has a better sealing solution. Ultra-Seal material provides a positive seal through controlled swelling of the gasket once exposed to hot engine oil. The polymers used in Ultra-20 also insure gaskets will not harden and fall apart like others can. Gaskets are coated with an easy release material which helps prevent tearing when the valve covers are removed.
| Make | Model | Years |
| Chevrolet | El Camino | 1959 - 1987 |
| GMC | Caballero | 1978 - 1987 |
| GMC | Sprint | 1971 - 1977 |
