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-116 UC70 Cast Polyurethane 70 Durometer O-Rings


Quantity Discount Prices

  • Model: UC70116
  • 125 in Stock
  • 3/4"ID X 15/16"OD X 3/32"CS
  • Actual: 0.737"ID X 0.103"CS
  • Metric: 18.72mm ID X 2.62mm CS

3/4"ID X 15/16"OD X 3/32"CS

High performance 70 Durometer Cast Polyurethane

Manufactured by the top polyurethane seal and component producers, with strong materials and extensive product expertise. Polyurethane is the material of choice to create longevity in products due to its resistance to abrasion and performance in punishing environments.

Isocynate cured with physical properties second to none, these o-rings are formulated for resistance to high pressure and punishing or highly abrasive environments. Typically called out as "cast" urethane O-rings, these parts perform well in quick disconnects, high pressure hydraulic and water applications and nail or riveting equipment.


70 A Durometer TODI Cured High Performance "Cast Type" Polyurethane

This material was developed to solve difficult hydraulic applications, and was produced specifically for use as O-Rings. It possesses extremely high mechanical properties, excellent abrasion, tear and extrusion resistance with low compression set. It has outstanding cold temperature properties and is usable in petroleum based, bio-degradable (synthetic and natural Ester) based fluids.

Features and Benefits:

  • Excellent oil and abrasion resistance
  • Low breakaway friction
  • Reduced extrusion
  • Longer life
  • Reduced operating costs and downtime


  • Bulldozers
  • Construction equipment
  • Forklifts
  • Mobile lifts
  • Agricultural equipment
  • Air Tools
  • Air Nailes
  • Flanges / static seals
  • Injection molding machines
  • Mobile arm trucks
  • Valves
  • General cylinders
  • High end Paintball Markers
  • High Pressure Air

Typical Physical Properties:

  • Color: Natural
  • Hardness, Shore A: 70
  • Tensile Strength, psi (MPa):  5,000
  • Elongation: 455
  • Compression Set: 70 hrs. at 70°C 12
  • Service Temperature Range: -81 to 121°C (-115 to 250°F)

Operating Limits:

The operating limits are highly dependent on the application. Combinations of pressure, temperature, fluid medium and other factors all greatly affect the performance and longevity of the seal.

  • Pressure: 3,000 psi / 21 Mpa
  • Temperature: -82°C to 121°C

The information contained herein is believed to be reliable, but no representation, guarantees or warranties of any kind are made to its accuracy or suitability for any purpose. The information presented herein is based on laboratory testing and does not necessarily indicate end product performance. Full scale testing and end product performance are the responsibility of the user.

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Stock O-Rings in over 20 different compounds and durometers the following six are the standard rubber materials in a range of durometers (Shore A) hardness to satisfy practically any service condition:

Viton® O-Rings / FKM: Fluorocarbon (Viton®) exhibits exceptional resistance to chemicals, oils, temperature extremes (-13°F to +446°F), low compression set, low gas permeability and excellent aging characteristics. Applications include: aircraft engines, automotive fuel handling systems, and chemical processing industries. FKM is also suitable for high vacuum applications. It is not recommended for exposure to ketones, alkalis, and Skydrol® fluids. Custom compounds are available with improved chemical and low temperature resistance.
AS-568 Viton® O-Rings | Metric Viton® O-Rings

Buna-N O-Rings / Nitrile O-Rings / NBR: Nitrile (Buna-N) is the most widely used elastomer due to its excellent resistance to petroleum products, operating temperature range (-40°F to +257°F) and one of the best performance-to-cost values. It's an ideal material for aerospace, automotive, propane and natural gas applications. Special Hydrogenated Nitrile (HNBR) compounds can improve resistance to direct ozone, sunlight, and weather exposure while increasing temperature range to +300°F.
AS-568 Buna-N O-Rings | Metric Buna-N O-Rings

Ethylene-Propylene / EPDM O-Rings: EPDM has outstanding resistance to heat, water and steam, alkali, mild acidic and oxygenated solvents, ozone, and sunlight (-40ºF to +275ºF); but it is not recommended for gasoline, petroleum oil and grease, and hydrocarbon environments. This popular rubber compound is usually the first choice for low torque drive belt applications.
AS-568 EPDM O-Rings | Metric EPDM O-Rings

Fluorosilicone O-Rings / FVMQ: Fluorosilicone (-75º to +400ºF) combines the good high and low temperature stability of silicones with the fuel, oil, and solvent resistance of fluorocarbons. FVMQ is unparalleled for aerospace fuel systems, auto fuel emission control systems and to meet or exceed government, military, aerospace, automotive, industrial and commercial specifications. However, due to relatively low tear strength, high friction and limited abrasion resistance of these materials, they are generally not used in dynamic applications. They are also not recommended for exposure to brake fluids, hydrazine, or ketones.
AS-568 Fluorosilicone O-Rings | Metric Fluorosilicone O-Rings

Silicone O-Rings / VMQ: In the Silicone family, you will find compounds which are superior as static seals in extreme temperature conditions. Standard compounds handle operating temperatures -85º to +400ºF. Silicone compounds are popular in food and medical applications because they are very clean and do not impart odor or taste. Special Phenyl silicones can be used down to -148°F.
AS-568 Silicone O-Rings | Metric Silicone O-Rings

Neoprene® O-Rings / CR: Neoprene (-40º to +250ºF) is reasonably priced and features good resistance to petroleum oils, ozone, sunlight and oxygen aging, relatively low compression set, good resilience and outstanding physical toughness. It is the preferred sealing material for the refrigeration industry because of its resistance to ammonia and Freon®.
AS-568 Neoprene® O-Rings