Rubber Seals, O-Rings, and Gaskets

While they differ in several ways, rubber seals, o-rings, and gaskets all serve the same basic function: To join two parts of a machine or engine by filling and sealing the space between them.

This prevents fluid and vapor leakage, keeps debris out of the machinery, and maintains pressure throughout, ensuring safety and proper function.

Smithers Rapra is fully equipped to offer a variety of lab testing services for rubber seals, o-rings, and gaskets. Our experts can advise you on the best standard testing package for your product or design a custom procedure that will suit your needs. Our testing services include:

  • Aging
  • Compression set
  • Compressive stress relaxation
  • Post conditioning pressurization
  • Temperature exposure (extreme cold and heat)
  • Tensile
  • Volume swell

Common Evaluations Performed in our Lab:

  • A-A-55759 – Rubber, Silicone; Sheet, Solid, Shape 15
  • A-A-59588 – Rubber, Silicone
  • AMS-C-9084 – Cloth, Glass, Finished, for Resin Laminates
  • ASTM C-1115 – Standard Specification for Dense Elastomeric Silicone Rubber Gaskets and Accessories
  • ASTM C-865 – Standard Practice for Firing Refractory Concrete Specimens
  • ASTM D-395 – Standard Test Methods for Rubber Property—Compression Set
  • ASTM D1414 – Rubber O-Ring Tensile Strength Testing
  • ASTM D-6147 – Standard Test Method for Vulcanized Rubber and Thermoplastic Elastomer—Determination of Force Decay (Stress Relaxation) in Compression
  • ASTM D-6576 – Standard Specification for Flexible Cellular Rubber Chemically Blown
  • ASTM E-2203 – Standard Specification for Dense Thermoplastic Elastomers Used for Compression Seals, Gaskets, Setting Blocks, Spacers and Accessories
  • ASTM F-477 – Standard Specification for Elastomeric Seals (Gaskets) for Joining Plastic Pipe
  • AWWA C200 – Steel Water Pipe – 6 inches (150mm) and Larger
  • DMS 2221C
  • GE A15F18A1
  • GE A15F18B1
  • GE A50TF298-S2
  • ISO 815 – Rubber, vulcanized or thermoplastic – Determination of compression set
  • ISO 3384 – Rubber, vulcanized or thermoplastic – Determination of stress relaxation in compression
  • MIL-I-24768 - Military Specification: Insulation, Plastics, Laminated, Thermosetting
  • MIL-R-25988B – Military Specification: Rubber, Fluorosilicone Elastomer, Oil-and-Fuel Resistant, Sheets, Strips, Molded Parts, and Extruded Shapes
  • MIL-R-6130C – Military Specification: Rubber, Cellular, Chemically Blown
  • MIL-STD-670B – Military Standard: Classification System and Tests for Cellular Elastomeric Materials
  • SAE AMS 3193 – Silicone Rubber Sponge, Closed Cell, Medium, Extreme Low Temperature
  • SAE AMS 3195 – Silicone Rubber Sponge, Closed Cell, Medium
  • SAE AMS 3196 – Silicone Rubber Sponge Closed Cell, Firm
  • SAE AMS 3197 – Sponge, Chloroprene (CR) Rubber, Soft
  • SAE AMS 3198 – Sponge, Chloroprene (CR) Rubber, Medium Stiffness
  • SAE AMS 3201 – Nitrile (NBR) Rubber, Dry Heat Resistant, 35-45
  • SAE AMS 3205 – Synthetic Rubber Low-Temperature Resistant 45-55
  • SAE AMS 3207 – Chloroprene (CR) Rubber, Weather Resistant, 25-35
  • SAE AMS 3208 – Chloroprene (CR) Rubber, Weather Resistant, 45-55
  • SAE AMS 3209 – Chloroprene (CR) Rubber, Weather Resistant, 65-75
  • SAE AMS 3215 – Acrylonitrile Butadiene (Nbr) Rubber Aromatic Fuel Resistant 65-75
  • SAE AMS 3216 – Fluorocarbon (FKM) Rubber, High-Temperature - Fluid Resistant, Low Compression, Set 70-80
  • SAE AMS 3217 – Standard Elastomer Stocks, Test Slabs
  • SAE AMS 3226 – Acrylonitrile Butadiene (Nbr) Rubber, Hot Oil and Coolant Resistant, Low Swell, 45-55
  • SAE AMS 3238 -  Butyl (IIR) Rubber, Phosphate Ester Resistant, 65-75
  • SAE AMS 3304 – Silicone Rubber, General Purpose, 70 Durometer
  • SAE AMS 3334 – Silicone Rubber, Extreme Low-Temperature Resistant, 35-45
  • SAE AMS 3345 – Silicone Rubber, 1000 Psi (6.90 Mpa) Tensile Strength, 45-55
  • SAE AMS 3347 – Rubber, Silicone 1200 Psi (8.27 Mpa), High Modulus 45-55
  • SAE AMS 7271 – Rings, Sealing, Butadiene-Acrylonitrile (NBR) Rubber Fuel and Low Temperature Resistant 60-70
  • SAE AMS 7379 – Rubber: Fluorocarbon Elastomer (FKM) 70 to 80 Hardness, Low Temperature Sealing Tg -40 °F (-40 °C) For Elastomeric Seals in Aircraft Engine Oil, Fuel and Hydraulics Systems
  • ZZ-R-765 – Federal Specification: Rubber, Silicone