HFL-781

Hydro-Fused®/Nonasbestos Gasket Materials

ASTM F-104: F729900B5E09M9

Material Description:

HFL-781 is a high density, controlled swell gasket material with styrene butadiene and natural rubber binders. It is used in heavy duty oil sealing applications such as diesel engine oil pans and front covers. It is intended for applications with short duration maximum temperatures up to 290°C (550°F). The following specification values are for 0.8mm (0.031”) gauge material.

Typical Properties

PropertyValueMethod
Compressibility, % (at 34.5MPa) 7-17 ASTM F 36
Recovery, % 40 (min.) ASTM F 36
Tensile Strength, AMD, MPa (psi) 13.90 (2014) (min.) ASTM F 152
Creep Relaxation, % 30 (max.) (0.8mm ga.) ASTM F 38
Sealability, Fuel A, ml/hr 2.0 (max.) at (300psi/10psi) ASTM F 37
Fluid Resistance, IRM903 Oil   ASTM F 146
           Change in Thickness, % 85 (max.)  
Fluid Resistance, Fuel B   ASTM F 146
          Change in Thickness, % 40 (max.)  
Binder Type Styrene Butadiene / Natural  
  Rubber  

Remarks and Related Documents:

Specification values determined by the test methods required for ASTM F-104, Type 3 materials.

ISO 9001: 2008 Registered

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