Insulating Materials | McMaster-Carr

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Aramid/Fiberglass Fabric

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Electrically Insulating

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Acetic Acid (White Vinegar)

25,807 Products

Raw Materials

Ceramic

Hard and wear resistant, it also withstands corrosion and high temperatures

710 products

Garolite

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

1,592 products

Mica

An electrical insulator that resists high temperatures; use in circuit breakers and heating elements

57 products

Plastic

A lightweight alternative to metal and glass

7,795 products

Felt

Thicker and more absorbent than fabric for insulating, polishing, cushioning, and gasketing

919 products

Fabric

Use to cover, clean, and insulate objects

156 products

Foam

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

2,559 products

Fiberglass

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

184 products

Aramid

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

10 products

Rubber

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

4,418 products

Aluminum

Lightweight, easy to machine, and corrosion resistant—all with material certificates for traceability

37 products

Wood

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

12 products

Hard Fiber

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

35 products

Heating, Ventilation, and Air Conditioning

Thermal Insulation Sheets

Line the walls of furnaces, freezers, ductwork, and buildings to keep heat in or out

268 products

Heat Barriers

Protect equipment and surfaces from damage caused by nearby heat sources

18 products

Pipe Insulation

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

1,056 products

Insulation Fill

Blow into walls to fill gaps in existing insulation, or mix as a filler in insulating cement

1 product

Spray Foam Insulation

Expands to fill in cracks, gaps, and other hollow spaces for a tight seal against drafts and heat

15 products

Insulation Fencing

Made of pliable mesh for securing insulation blankets, covers, and jackets

3 products

Fastening and Joining

Insulating Washers

Isolate screws from electrical current and prevent corrosion from mating different metals

277 products

Washers

Nearly every size and shape imaginable, from flat washers to clipped to curved

1,227 products

Sealing Washers

Prevent fluids from leaking around fasteners

600 products

Lock Washers

Resist vibration to prevent fasteners from loosening

9 products

Cushioning Washers

Cushion joints to dampen vibration and protect them from wear

167 products

Finishing Washers

Screw heads sit flush to prevent snagging and to create a neat, finished appearance

14 products

Thread

Sew pieces of fabric together

2 products

Tape

Bind, seal, and mark surfaces

343 products

Weld-Backing Tape

Stick to the back of welding seams to contain spatter and prevent gases from weakening the weld

11 products

Building and Machinery Hardware

Vibration-Damping Mounts

Attach to machinery to reduce vibration and noise and extend service life

2 products

Thresholds

Transition between flooring surfaces and reduce gaps between doors and floors

1 product

Weatherstripping

Seal gaps around doors, windows, and frames

88 products

Window Film

Apply to windows for privacy, insulation, less glare, and a lower chance of shattering

27 products

Doors

Everything from single to double to two-way swinging doors

4 products

Ceiling Tiles

Create a new drop ceiling that allows access to pipes and wiring

34 products

Access Panels

Install in ceilings, walls, concrete floors, and tanks to access and inspect inside

6 products

Ceiling Tile Sound Barriers

Lay over ceiling tiles to block sound

1 product

Fabricating and Machining

Firebricks

Insulate furnaces to minimize heat loss while adding flame resistance

14 products

Firebrick Repair Coatings

Renew heat resistance and performance of worn firebrick

1 product

$Refractory Cement$

Refractory Cement

Lay firebricks or set and repair cast iron and steel furnaces, heaters, stoves, and boilers

4 products

Fluid Handling

Heat Sink Compounds

Bond heat sinks to surfaces, eliminating air gaps for maximum heat transfer

11 products

Wraparound Heaters

Wrap around drums, pails, and other containers to indirectly warm their contents

30 products

Tube and Tube Fittings

Typically more flexible than pipe for carrying liquids and gases in short runs around equipment

39 products

Thermocouple Insulating Sleeves

Protect thermocouple wire in extreme-temperature applications, such as die casting and heat treating

13 products

Thermocouple Connector Covers

Shield thermocouple connectors from dust and debris

1 product

Electrical

Heat-Shrink Tubing End Caps

Seal moisture out of crimped electrical connections

26 products

Heat-Shrink Tubing Splitters

Insulate and seal where wire splits off from cable; also known as breakout boots

23 products

Heat-Shrink Tubing Seal Wrap

Wrap around wire like tape to create a moisture resistant seal before adding heat-shrink tubing

5 products

Cold-Shrink Tubing

Conforms to wire and cable without heat, creating a permanent, watertight seal

17 products

Wire Sleeving

Bundle wiring and protect from abrasion and heat

885 products

Electrical Insulating Varnish

Coat wire and other metal electrical parts to protect them from oil, chemicals, and moisture

6 products

Thermal Interface Material

Dissipate heat away from electronic components

24 products

Heat-Shrink Tubing

Apply heat to seal and insulate electrical wiring and connections

781 products

Potting Compounds

Encase electronic assemblies in material that hardens to protect from dust, moisture, and vibration

63 products

Electrical-Insulating Wire Caps

Cover live wire ends to protect against shock from accidental contact

3 products

Electrical Cable Repair Resins

Protect and insulate electrical cables and repair damaged insulation

8 products

Battery-Terminal Washers

Stop battery acid fumes from corroding terminal posts

1 product

Cold-Shrink Tubing End Caps

Seal crimped electrical connections without heat or tools to protect against moisture

4 products

Power Transmission

Brake and Clutch Lining

Replace the lining in brakes and clutches; also known as friction material

145 products

Material Handling

Pipe Routing Saddles

Clip to strut channel to cradle insulated tubing and pipe

6 products

Pipe Hangers

Suspend pipe, conduit, and tube from threaded rods, hooks, and straps

11 products

Envelopes

Standard, bubble-lined, and paper-padded for mailing or shipping documents and other items

0 products

Heat-Shrink Wrap

Create a form-fitting barrier around packages to protect them from moisture and dirt

27 products

Bubble Wrap

Air bubbles cushion fragile items better than foam to protect them while shipping and storing

1 product

Robot Safety Padding

Trigger an emergency stop when robot arms contact a worker or object

6 products

Shipping Box Liners

Line cardboard boxes to keep the items inside at a consistent temperature

13 products

Facility and Grounds Maintenance

Sink Pipe Covers

Prevent burns from hot water pipes

3 products

Safety Equipment

Vibration-Damping Sheets

Stick to duct, housings, and other vibrating equipment to reduce noise

10 products

Vibration-Damping Coatings

Apply to irregularly shaped equipment and large areas to reduce noise from vibration

2 products

Sound Barrier Partitions

Stand in noisy areas to block and reflect sound

1 product

Curtain Partitions

Section off work spaces, locker rooms, and restricted areas

45 products

Heat-Resistant Blankets

Drape over surfaces or wrap around parts to protect them from flames, sparks, and weld spatter

30 products

Electrical Protection Blankets

Wrap around power lines and electrical equipment to shield workers from high voltage

6 products

Sound Barrier Sheets

Block and reflect noise to keep it from reaching other parts of your facility

14 products

Acoustic Insulation

Absorb sound to quiet noisy areas and machines

53 products

Curtains

Pull shut to protect against dust, weld spatter, heat, and splashing liquid

182 products

Sealing

Sealants

Fill and seal gaps in metal, plastic, wood, and other materials

1 product

Edge Seals

Block dust, water, and wind from entering the gaps around doors and windows

524 products

Caulk Gun Sleeves

Insulate your caulk gun so contents remain easy to dispense, even in cold weather

1 product