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
| Property | Value | Method |
|---|---|---|
| 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.
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