Why Silicone Rubber
- Cork dries out and looses its resilience, silicone rubber does not.
- Nitrile Rubber has excellent oil and chemical resistance, but it's various compounds have upper temperature limits of only 170 degrees F to 200 degrees F. This, in our opinion, is just too close to the operating temperatures of most engines. Our Silicone rubber has a temperature limit of 450 degrees F. Roadster Gaskets won't harden and crack from hot engine operation, and cold winter storage.
- Crush resistance is the ability of the gasket to rebound after being compressed. Silicone rubber rebounds to nearly it's original shape even after years of installation. This gasket has been installed on our MGTD for two years and shows little sign of permanent "crush".
- Silicone rubber resists becoming saturated with oil and moisture, or drying out. The cork push rod cover gasket that was installed on our MGTD shows signs of having swollen to the point that it was rubbing on the push rods. It is so badly deteriorated it is ready to crumble to bits and pieces into the oil pan.
(Notice the grooves where the push rods rubbed against the gasket)
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