Polymers | McMaster-Carr

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DFARS Specialty Metals

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Diluted Salt Solutions

23,866 Products

Raw Materials

Plastic

A lightweight alternative to metal and glass

9,052 products

Rubber

Compresses and bounces back to shape; often used for sealing, cushioning, and shock absorbing

6,066 products

Garolite

A strong, machinable alternative to metal and plastic widely used in circuit boards and gears

1,991 products

Fiberglass

A lightweight alternative to metal and wood widely used in electrical and structural applications

442 products

Foam

Pockets of air make it lighter in weight than rubber; good for packing, insulating, and sealing

2,672 products

Carbon Fiber

The strongest composite we offer; comparable in strength to 6061 aluminum but lighter in weight

318 products

Graphite

Compressible or conductive for making high-temperature seals, furnace parts, and crucibles

80 products

Aramid

Strong, lightweight, and an excellent thermal insulator; also known as Nomex

10 products

Kevlar

Super tough for protection against prolonged wear and abrasion

11 products

Wood

Commonly used to build ramps, crates, and prototypes or to make repairs

15 products

Hard Fiber

Chemically treated to be hard and dense, this is the easiest composite to machine in our offering

79 products

Additives and Fillers

Mix into coatings, resins, polymers, and metal to boost strength, conductivity, and lubricity

10 products

Pigments and Dyes

Add color to liquids, mixtures, and materials

11 products

Fabricating and Machining

Casting Compounds

Mix and pour into molds to capture intricate detail when casting parts, linings, and prototypes

69 products

Prototyping Foam

Carve, mill, or sand into lightweight parts for testing

27 products

3D Printer Filaments

Run through filament 3D printers to form plastic parts

124 products

3D Printer Resins

Create parts from resin 3D printers with greater detail than filament 3D printers

44 products

3D Printer Powders

Create metal or plastic parts from powder bed fusion (PBF) printing systems

5 products

Sealing

Gasket Material

Cut custom shapes and sizes to fill gaps between flat surfaces

592 products

EMI/RFI Shielding Gaskets

Fit around enclosure doors or data connectors to prevent inaccurate signals and flickering displays

104 products

Cord Stock

Cut to length to create customized seals

470 products

Facility and Grounds Maintenance

Surface Fillers

Repair chips, cracks, and tears in various surfaces

166 products

Measuring and Inspecting

Metal Detector Calibration Kits

Test the sensitivity of food-processing metal detectors

1 product

Fastening and Joining

Shims

Align and space components on shafts, or level machinery, cabinets, and doors

294 products

Shim Stock

Cut into custom shapes to align, space, and level components on dies, presses, and machinery

194 products

Threaded Rods

Anchor, connect, or hang components in a wide variety of applications

158 products

Machine Key Stock

Cut a custom length to transfer torque from shafts to components such as gears and sprockets

9 products

Heating, Ventilation, and Air Conditioning

Pipe Insulation

Fit around pipe, tubing, and tanks to reduce heat loss or condensation

546 products

Fluid Handling

Filter Mesh

Strain particles out of various substances

107 products

Perforated Sheets

Filter, sort, separate, and strain liquid or dry material

21 products

Sintered Filters

Tiny holes let particles such as air, gas, and vapor pass through while trapping contaminants

9 products

Pump Repair Kits

Keep your diaphragm, circulation, and metering pumps in working order

7 products

Electrical Power, Networking, and Controlling

Thermal Interface Material

Dissipate heat away from electronic components

38 products

Circuit Boards

Create your own circuit board designs by adding components

72 products

Containers, Storage, and Furniture

Tank Patches

Spin with a handheld electric router to seal holes in plastic tanks and containers

4 products

Lighting

Light Pipes

Concentrate and direct light from the bulb on a circuit board to a display

16 products

Building and Machinery Hardware

Protective Film and Tape

Adhere to surfaces to keep them free of scratches, chemicals, moisture, and germs

30 products