Well thats what I mean really, what would you recommend as the most suitable regarding its application (fuel tank sealing washer's) taking into account such things as cost, life span, working temp etc. The rubber material itself would be 7.25mm thick, 45mm outside diameter and 32.5mm inside...
I have been tasked to find a suitable rubber to replace "DTD 625" on aircraft fuel tank sealing washers. Any recommandations regarding working temp, cost, life span etc would be extremly helpful.