Product Features
* Retains high flexibility, oil resistance properties through use of a patented adhesion system
* Sensor Safe, low odor, noncorrosive
* Meets performance specs of OE silicone gaskets
* Temperature range -65F to 550F intermittent, resists auto and shop fluids and vibration
* Suggested Applications: Valve covers, oil pans, intake manifold end seals, timing covers, transmission pans
There isn't even any oil or grease on the spot this stuff is used at. How's it supposed to break down
I guess if you really want durability for a few bucks more you could go with the copper:
Product Features
* Sensor-safe, low odor, non-corrosive
* Superior adhesion
* Three times more oil resistant than conventional silicones; eight times more flexible than cut gaskets
* Temperature range -75F to 700F intermittent; resists auto and shop fluids and vibration
* Suggested Applications: Exhaust manifolds/headers, valve covers, oil pans, timing covers, water pumps, thermostat housings