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BUNA-N Tri-Clamp Gaskets (Made in USA, FDA Compliant / Meets 3A Standards)

CAD 1.48
(3 reviews) Write a Review
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Tri-Clamp BUNA-N (Viton) Gasket  

Buna-N Tri-Clamp gaskets are the preferred choice of material when using a closed loop, closed column, or open blast extraction with butane or propane as the extraction solvent. Buna-N Gaskets offer a lower temperature rating and have better physical properties than Viton gaskets and the best part is that they are also cheaper than Viton and provide the same chemical resistance to butane and propane.


  • Cleaning Buna-N gaskets with isopropyl alcohol is not recommended and will void any claims of defect or damage.


Key Features:

  • Lower Temperature Range
  • Lower Costs
  • Better Compressibility and Springiness
  • Excellent Resistance to Butane and Propane
  • Better Tear Resistance
  • Better Abrasion Resistance


Material BUNA-N (Nitrile)
Color Black
Connection Type Tri-Clamp
Conformance FDA Compliant / Meets 3A Standards
Thermal Properties:  
   -Low Temperature Range -70°F
   -Minimum for Continous Use (Static) -40°F
   -Brittle Point -70°F
   -High Temperature Range +210°F to +250°F
   -Maximum for Continuous Use (Static)                     +250°F
Gas Permeability Excellent
Durometer or Hardness Range 65 Shore A
Tensile Strength Range 200-3500PSI
Elongation Range (%) 350-650%
Abrasion Resistance Excellent
Tear Resistance Excellent
Resilience / Rebound Good


Chemical Compatibility:

Butane A - Excellent
Propane (liquified)             A - Excellent
-Amyl B - Good
-Benzyl D - Severe Effect
-Butyl C - Fair
-Diacetone D - Severe Effect
-Ethyl C - Fair
-Hexyl A - Excellent
-Isobutyl B - Good
-Isopropyl B - Good
-Methyl A - Excellent
-Octyl B - Good
-Propyl A - Excellent

Disclaimer: LeDAB recommends no more than a -40F Operating Temperature and is not responsible for the user running their system with incompatible chemicals.



3 Reviews Hide Reviews Show Reviews

  • 5

    Posted by Bart on Nov 12th 2021

    Great quality gaskets. Will purchase again!

  • 5
    Buna-N Easy On Gasket 10"

    Posted by Unknown on Jan 20th 2021

    For closed loop extractors it is the best and easiest gasket to use. Easy on lip ensures the gasket gets properly seated flush, level and in contact with all points to create a perfect seal. Highly recommended.

  • 5
    provides excelent seal, durable with butane and or propane

    Posted by Unknown on Jan 20th 2021

    Highly recommended for closed loop extractors