Plastic Washers and Gaskets - I. G. Marston Co., Inc.

Plastic Washers and Gaskets

Plastics – Thermoplastic Materials

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


Excellent wear properties in both wet and dry environments. Natural (white), black, and other colors available.

Strong and stiff
Low friction
Excellent machinability
Good chemical resistance
Good dimensional stability
Glass-filled grades available
Low moisture absorption
FDA compliant grades available

Automotive uses, fuel pumps
Showerheads, sprinklers
Wristwatch gears


Delrin® acetal resin bridges the gap between metals and ordinary plastics with its unique characteristics.

Solvent and fuel resistance
Stiffness & hardness
Abrasion resistance
Dimensional stability
Low wear & low friction

Bearings & bushings
Electrical insulator parts
Buckles & Zippers
Door and office systems
Fuel systems


This material is used in order to comply with UL, CSA, IEC, VDE, TUV, BSR or MITI standards when there is a need for electrical insulators and barriers. This unique product line has successfully replaced a variety of flame retardant sheet materials including polycarbonate, polyester, PVC and aramid papers.

UL 94V-0 Flame Class Rating
Non-hygroscopic (moisture absorption < 0.1%)
Excellent dielectric strength
Superior score and folding ability

Computers and computer peripherals
Medical equipment
Conventional and uninterruptible power supplies
Automotive products
Electrical and power distribution systems
Consumer products
TVs and appliances
Telecommunications equipment

Electronic and Electrical insulation
Barriers between PC boards and between PC boards and housings
Barriers to prevent access to dangerous areas
Internal fabricated parts: Air flow baffles and EMI/RFI Shields

Formex™ GK

This material is used in order to comply with UL, CSA, IEC, VDE, TUV, BSR or MITI standards when there is a need for electrical insulators and barriers. This unique product line has successfully replaced a variety of flame retardant sheet materials including polycarbonate, polyester, PVC and aramid papers.

0.017 inch thick
Superior dielectric strength
Continuous use temperature to 115°C / 239°F
Score and fold to fabricate economical 3-D parts
Fold repeatedly without cracking or splitting
High dielectric breakdown strength
UL 94 V-0 flame class
RoHS compliant
Superior Chemical Resistance

Enterprise Computing Servers
Storage Devices
Electrical Distribution Equipment Power Supplies
Medical Devices
Appliances and HVAC Equipment


Statex™ materials are used in order to comply with UL, CSA, IEC, VDE, TUV, BSR or MITI standards when there is a need for electrical insulators and barriers. This unique product line has successfully replaced a variety of flame retardant sheet materials including polycarbonate, polyester, PVC and aramid papers.
Computer manufacturers often use static dissipative materials to insulate and protect their circuit boards. As a highly effective electrical barrier and static dissipative material, Statex™ is an ideal product for design engineers to use to keep circuit boards from developing static electricity between each other and from experiencing electrostatic shock from outside sources.

UL 94V-0 Flame Class Rating
Non-hygroscopic (moisture absorption <0.1%)
Excellent dielectric strength
Superior score and fold
Competitively priced

Computer circuit boards
Electrical barriers and insulators


This polyimide film developed by DuPont can remain stable in a wide range of temperatures, from -273 to +400 °C (-459 - 752 °F / 0 – 673 K). Kapton is used in, among other things, flexible printed circuits, flexible electronics and thermal micrometeoroid garments.

Good temperature properties
Good dielectric properties
Thermal insulation
Thermal stability

Medical – Xrays
Space program
Insulators in various assemblies


The outstanding strength, flexibility, and electrical properties of Mylar® type EL films make them well suited for many electrical and electronics applications. The good handling and winding characteristics make them especially suitable for coating; die cutting, embossing, and laminating operations.

Good dielectric properties
High temperature durability
Good handling characteristics
Clear to hazy in color
Outstanding strength

Electronic applications
Release Films
Office Supplies

Nylatron GS®

Nylatron proprietary formulations ( GSM, GSM-Blue, NSM ) contain solid lubricants that impart toughness, low coefficient of friction, and good abrasion resistance and make it an ideal replacement for a wide variety of materials from metal to rubber.

Wear resistant
High heat distortion temperature
Vibration resistant
Easy machine-ability
Dimensional stability

Pulp and Paper
Food Processing
Metal Forming
Mining Equipment
Material Handling
Oil Field Applications
Wear Strips
Bottling Equipment
Packaging Equipment
Bushings, Bearings

Nylon 6/6

Of all the unmodified nylons, it has the highest melting point, is the strongest, and the most rigid. Can be pre-colored or dyed in wide range of colors. The addition of glass Fibre improves stiffness. Better low temperature toughness than Acetal or Nylon 6.

Good fatigue resistance
The strongest aliphatic nylon
High wear and abrasion resistance
Low coefficient of friction
Resilience and impact resistance
FDA compliant, USDA approved

Industrial yarns
Clothing, carpets
Manufacturing & Automotive uses
Toothbrushes Many varieties of uses

Nylon 6/12

It possesses similar properties to that of Nylon 6/6, however, Nylon 6/12 has a higher temperature rating and lower water absorption.

Non abrasive to other materials
Noise damping characteristics
Good electrical insulating properties
Ease of fabrication
Able to operate with or without lubrication

Military applications
Automotive, Electrical insulator
Mechanical parts
Clothing, carpets

Nylon MDS - Nylatron GS

Nylon MDS - Nylatron GS (Molybdenum Disulfide) is highly resistant to wear, possesses high mechanical strength, yields very good electrical properties and is an excellent choice for load applications were moving parts is apparent. Nylon MDS is also self-lubricating.

Low Coefficient of Friction
Excellent Dielectric Properties
High Mechanical Strength
Resistant to Wear

Applications which need lubricity
Marine, Replace moving parts in machinery
Automotive, Electronic
Industrial valves

Polycarbonate (Lexan®)

A balance of useful features including temperature resistance, impact resistance and optical properties position polycarbonates. It mainly used for electronic applications that capitalize on its collective safety features. Being a good electrical insulator and having heat resistant and flame retardant properties.

Excellent impact strength
Ease of machining
Good weather ability
UV resisting
Thermoform ability

Security glazing
Security barriers
Machine guards
Bus shelters

Polyethylene (HDPE & LDPE)

Polyethylene is used more than any other thermoplastic polymer. There is a wide variety of grades and formulations available that have an equally wide range of properties. The three most commonly used grades of polyolefin are: Low Density, High Density and Polypropylene.

Ease of processing
Chemical resistance
Abrasion resistance
Electrical properties
Impact resistance
Low coefficient of friction
Near-zero moisture absorption

Containers for all household products
Industrial containers for chemicals
Pipes for refrigeration
Durable plastic furniture
Added to steel pipes for corrosion resistance


It provides superior qualities and is the most versatile and cost effective plastic in comparison to other thermo-forming and polyolefin materials. It has good impact strength, surface hardness, dimensional stability and excellent abrasion resistance. Polypropylene is resistant to a wide variety of acids, alkalis and solvent solutions with a temperature range up to 200ºF.

Excellent chemical resistance
Easily formable, welded & machined
Excellent electrical properties
FDA Approved
Low moisture absorption rate
Excellent tensile strength & stiffness

Plastic bags for many industries
Luggage, bottle caps
Boxes, crates
Plastic chairs


Polyvinyl chloride, commonly abbreviated PVC, is the third most widely produced plastic, after polyethylene and polypropylene. PVC is widely used in construction because it is durable, cheap, and easily worked.

Fast fusion and good property flow
Excellent transparency and good surface of finished products
Easy coloring properties
High heat stability

Insulates electrical wiring
Variety of Construction applications


Because of its remarkable abrasion resistance, parts made from polyurethane will often out-wear rubber, plastic, and metal by margins up to 20 to 1. With its high-flex life, cut-resistance, load-bearing capacity and outstanding resistance to weather, ozone, oxygen and radiation, polyurethane provides unlimited design opportunities.

-40°C to +130°C
High impact resistance
High abrasion resistance
Low compression set
Tear resistant
Oil & petrol resistance
Good low temperature flexibility
Weather resistant
Excellent electrical insulating properties
75A to 98A shore for seals
45A to 68D for components

Furniture foams
Seals, Bushings, Gaskets

PTFE (Polytetrafluoroethylene)

PTFE (Polytetrafluoroethylene) is one of the most thermally stable plastic materials. There is no appreciable decomposition at 260°C. PTFE can be employed at any temperature from -200°C to +260°C. The original PTFE resin was invented by DuPont in 1938.

High heat resistance
High chemical resistance
High dielectric properties
Low friction of coefficient

Plumbing for sealing
Glasses, hair care products
Aerospace Industry
Industrial Processes
All-weather Clothing

PTFE Mechanical Grade

Mechanical PTFE is an economical, reprocessed PTFE with slightly lower physical properties than virgin grade. It is also referred to as "recycled" or "reclaimed". Reprocessed material is added during the manufacturing process; usually a small percentage but it varies. It is more economical than virgin. This is the grade used for most applications, for less demanding uses where high purity materials are not required, such as noncritical chemical, electrical, and mechanical applications.

PTFE can be enhanced with fillers such as: glass fibers, carbon, graphite and bronze.

Not suitable for food contact
Less expensive than virgin PTFE as it’s reprocessed material
Better wear resistance than Virgin PTFE
More compressive strength than the virgin grade
Less smooth and darker in color than the virgin grade
PTFE resins have a continuous temperature rating of 260°C (500°F)
Both Virgin and Mechanical grades are 100% PTFE material and have similar chemical properties

Mechanical Packings


This is an extremely tough and abrasion resistant thermoplastic that is used for applications that require durability and/or abrasive wear resistance. Highest abrasion resistance of any polymer.

Outstanding impact strength
Cost efficient
Self lubricating material
Light weight
Sound dampening properties
Good chemical resistance

Packaging machinery components
Wear strips
Idler sprockets
Chute & Hopper liners
Food processing machinery


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