Fibre and Felt Washers and Gaskets - I. G. Marston Co., Inc.

Fibre and Felt Washers and Gaskets

All Materials Are RoHS and DFARS Compliant
MSDS and Technical Data Sheets are available upon request

Vulcaized Fibre – grey, red, white and black

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Vulcanized Fibre is a cellulose material that contains no resins or bonding agents. It has extremely high internal bond strength; and even though it is pure cellulose, it will not delaminate or separate, even in water. Vulcanized fibre is made from high purity cellulose papers specially formulated to produce the desired end-use properties in various grades. The layers of paper are passed through a gelatinizing bath and are chemically laminated into a homogenous material of the desired thickness. The gelatinizing agent is then removed, resulting in a chemically pure product.


Commercial (Grey, Red, Black) for Mechanical & Electrical applications
3 Bone (Grey only) High Density – Hard & Stiff, resists wear and compression

  • White in color for appearance
  • Arc Resistant
  • Long wearing
  • Clean Machining
  • Readily Punched and Formed
  • Light Weight (1/2 of Aluminum)
  • Resistance to oils


  • Mechanical and Electrical applications
  • Used for washers
  • Luggage
  • Patterns
  • Insulating plates
  • Switch and appliance insulation
  • Automobile parts
  • Electric motor insulation
  • Gaskets

Fishpaper (A Vulcanized Fibre)

Fishpaper is a strong, cellulose paperboard insulation. It is used primarily for its excellent electrical insulating properties. Fishpaper is the name for the electrical grade of vulcanized fiber. Fishpaper properties include light weight, and ease of forming and punching. Fishpaper is unique because it is more resistant to heat and cold than comparable plastic material. Available in thinner gauges, typically from 0.0078″ to 0.062″ thick; fishpaper’s standard color is grey.


  • Wear resistance
  • Hard
  • Dielectric strength
  • Arc resistance
  • Water resistant
  • Good mechanical properties


  • Labels, tags
  • Gaskets
  • Abrasives
  • Electrical insulation
  • Luggage, Labels

Felt (Various Grades)

Pressed wool felt is made via an intricate process often referred to as “wet processing”. Fibers are worked together by pressure, moisture, and vibration, then carded and cross-lapped to make multiple layers of material. The ultimate thickness and density of the material determines the amount of layers that are then steamed, wetted, pressed and hardened. The majority of fiber used in pressed felt is wool. Wool fibers have small barbs on them, which aids in the natural locking or felting process. The manufacturing of pressed wool felt is primarily mandated by SAE standards. These standards determine the wool content, density, and other physical and mechanical properties of the felt. Pressed wool felt is identified by the SAE standards F-1 through F-26. The lower the SAE numbers will be more machinable, have better vibration absorption, and better abrasion resistance. Wool felt has excellent wicking properties. It can absorb several times its weight in oil, and when used as a lubrication wick, it will supply small amounts of oil at a uniform rate. Pressed wool felt has excellent solvent resistance and stability in oil. SAE wool felt is unaffected by sunlight and maintains its original form after long periods of stress.


  • SAE Grades
  • Acoustic Grade
  • Wool
  • Needled
  • Blended
  • Synthetic
  • Polyester
  • Polypropylene Decorative-Colors Adhesive Backed
  • Wicking
  • Orthopedic


  • Insulations
  • Resilient padding
  • Automotive packing’s
  • Filters for gas & air
  • Drum seals,
  • Deadening acoustic uses
  • Weather strips
  • Dust shields
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