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Data Sheet

Specification Data Sheets and Typical Data Sheets

  • Value Grade

HFL-781

889

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℃ (550℉).   

Property :Specification :Method :
Density, g/cc(lb/cu.ft)1.63 (102) (min.)ASTM F 1315
Compressibility, % (at 34.5MPa)10 - 20ASTM F 36
Recovery, %40 (min.)ASTM F 36
Tensile Strength, AMD, MPa(psi)13.90 (2016) (min.)ASTM F 152
Creep Relaxation, % 30 (max.)ASTM F 38
Sealability, Fuel A, ml/hr 2.0 (max.) at (500psi/15psi)ASTM F 37
Fluid Resistance, IRM903 Oil  ASTM F 146
Change in Thickness, %70 (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 7 materials.
Hydro-Fused, MicroPore, Pro-Formance, Syntheseal, Thermo-Tork, Select-a-Seal and Voltoid are registered trademarks of Interface Solutions, Inc.

WARNING: The description and performance data provided herein constitute a material specification for quality control purposes, but do not imply suitability for use in a specific application. Your specific application should not be undertaken without independent study and evaluation for suitability. Failure to select proper sealing products may result in either property damage or personal injury. For specific application recommendations, contact Interface Solutions. INTERFACE SOLUTIONS EXPRESSLY DISCLAIMS ALL WARRANTIES EITHER EXPRESS OR IMPLIED, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR OF FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL ISI BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL, CONSEQUENTIAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THE INFORMATION CONTAINED IN ITS SPECIFICATION DATA SHEETS, ITS PRODUCTS OR THEIR FUTURE USE BY YOU OR ANY THIRD PARTIES, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.