All components of our suspension oils have been selected based on compatibility with the rubber elastomers used to make the internal seals of a fork or shock.
Seals are soaked in our oil at high temperatures for extended periods, and the effect on the seal is measured with a seal indentation machine (softening is inversely correlated with mechanical strength) Compression test speed was 0.1 mm/sec. Maximum distance set at 1.5 mm and trigger force was 0.196 N. The diameter of the probe was 3.00 mm. An SMS materials testing device was used. Sample were allowed to equilibrate to 22ºC before testing. Also measured is change in ID, OD, and thickness.