To ensure that that gasket does not stick to adjacent flanges.
The test shall be carried out in accordance with ASTM F 607 at ambient temperature. In case an anti-stick coating is applied, the test report shall record the brand and type of that coating.
The DeltaV-Seal does not stick on the flange.
There shall be no visible adhesion of any gasket material to any of the adjacent flanges.
The gasket adhesion test could be considered as acceptable.