Who told you that HPA can explodewhat a buffoon.Air heats up when compressed NOT when expandingthe release of air from a cylinder through a firing valve is actaully cooling.Feel the cylinder after a few quick shots.
No my friend Air does not explode when released from a PCP airgun. for O rings you simply massage them with the smallest amount of silicone Grease.For pistons and such like the Molyslide is the best option,just stay away from silicone on places that actaully interact with each other,during the cocking and firing cycle of an airgun.
Gaham.