there is no indestructable apex, side or corner seal. if they hold up then you will crack an iron, if you pin the engine the seals will warp or eat a side/corner seal. there is no way to build an engine to handle detonation more than in short bursts.
RA seals seem to be one of the most popular choices of "banana" seals. meaning they will warp under excessive EGTs if everything else survives.
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