A controlled swell material for demanding applications
HFL - 781 incorporates a proprietary blend of styrene, butadiene and natural rubber. It is designed for demanding applications requiring excellent sealability, torque retention, recovery and conformity to uneven flange surfaces. The material swells in the presence of oils and fuels. Recommended for applications where intermittent operating temperatures do not exceed 290°C (550°F).
Applications include diesel oil pan, gearcase and flywheel housing.
ASTM F104 Line Call Out F729900B5E09M9