Extruded Polystyrene | McMaster-Carr

Filter by

Thickness

Width

Length

Flexibility

Insulation R Value

Color

Shape

Material

Maximum Temperature

Performance

Ultra Electrically Insulating

Density

Minimum Temperature

Heat Flow Rate @ Temperature

RoHS

Export Control Classification Number (ECCN)

EAR99

DFARS Specialty Metals

Exempt

REACH

Compliant

Not Compliant

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

Flammability Rating

ASTM E84 15/125 for Flame and Smoke

Environment

Diameter

Clarity

Tensile Strength

2,400 psi to 4,000 psi

9,000 psi

For Use With

Beverage

Food

Acetic Acid (White Vinegar)

Methanol (Methyl Alcohol)

Mineral Oil

Nitric Acid

Phosphoric Acid

Sodium Hydroxide (Caustic Soda)

Fabrication

Hardness

77 Products

About Selecting Thermal Insulation

Compare R-value and temperature range to find the insulation material that best suits your application.

Moisture-Resistant Low-Temperature Rigid Polystyrene Foam Insulation Sheets

These sheets resist the absorption of water, air, and gas and are widely used in cold-storage and packaging applications.

1 lb/ft³ Density

Image of Product. Front orientation. Insulation Sheets. Moisture-Resistant Low-Temperature Rigid Polystyrene Foam Insulation Sheets.

Polypropylene Coated—Polypropylene-coated sheets have an added layer of moisture protection.

									1 ft. × 12"		4 ft. × 24"
	Thk.	Max. Temp., ° F	Insulation R Value	Flexibility	Heat Flow Rate @ Temp.	Color	Flammability Rating	Pkg. Qty.		Pkg.		Pkg.
Polypropylene Coated



		3/4"	165	2.9	Rigid	0.26 BTU/hr @ 75° F	White	ASTM E84 15/125 for Flame and Smoke	8	93475K61	000000	93475K62	000000


		1"	165	3.8	Rigid	0.26 BTU/hr @ 75° F	White	ASTM E84 15/125 for Flame and Smoke	6	93475K63	00000	93475K64	00000
		1 1/2"	165	5.8	Rigid	0.26 BTU/hr @ 75° F	White	ASTM E84 15/125 for Flame and Smoke	4	93475K65	00000	93475K66	00000

1.45 lb/ft³ Density

	Temperature, ° F						4 ft. × 48"
Thk.	Min.	Max.	Insulation R Value	Flexibility	Heat Flow Rate @ Temp.	Color		Each



	1"	-40	165	5	Rigid	0.2 BTU/hr @ 75° F	Green	9255K11	000000


	1 1/2"	-40	165	7.5	Rigid	0.2 BTU/hr @ 75° F	Green	9255K12	00000
	2"	-40	165	10	Rigid	0.2 BTU/hr @ 75° F	Green	9255K4	000000

Easy-Thermoform Polystyrene Sheets

Often fabricated into signs, packaging, and light duty housings, these sheets are easy to thermoform.

	Lg.	Fabrication	Min. Temp., ° F	Max. Temp., ° F	Tensile Strength, psi	Impact Strength, ft·lbf/in	Color	Flammability Rating	Food Industry Std.		Each
1/32" Thick (-0.003" to 0.003" Tolerance)



	12"	24"	Extruded	0	185	2,400 to 4,000	1.5	White	UL 94 HB	FDA Standard	8734K31	00000


	36"	36"	Extruded	0	185	2,400 to 4,000	1.5	White	UL 94 HB	FDA Standard	8734K38	00000
	40"	72"	Extruded	0	185	2,400 to 4,000	1.5	White	UL 94 HB	FDA Standard	8734K29	00000


	1/16" Thick (-0.005" to 0.005" Tolerance)



			12"	24"	Extruded	0	185	2,400 to 4,000	1.5	White	UL 94 HB	FDA Standard	8734K32	0000


			36"	36"	Extruded	0	185	2,400 to 4,000	1.5	White	UL 94 HB	FDA Standard	8734K39	00000
			40"	72"	Extruded	0	185	2,400 to 4,000	1.5	White	UL 94 HB	FDA Standard	8734K22	00000


			3/32" Thick (-0.006" to 0.006" Tolerance)



					12"	24"	Extruded	0	185	2,400 to 4,000	1.5	White	UL 94 HB	FDA Standard	8734K33	0000


					36"	36"	Extruded	0	185	2,400 to 4,000	1.5	White	UL 94 HB	FDA Standard	8734K41	00000
					40"	72"	Extruded	0	185	2,400 to 4,000	1.5	White	UL 94 HB	FDA Standard	8734K24	00000


					1/8" Thick (-0.008" to 0.008" Tolerance)



							12"	24"	Extruded	0	185	2,400 to 4,000	1.5	White	UL 94 HB	FDA Standard	8734K34	0000


							36"	36"	Extruded	0	185	2,400 to 4,000	1.5	White	UL 94 HB	FDA Standard	8734K42	00000
							40"	72"	Extruded	0	185	2,400 to 4,000	1.5	White	UL 94 HB	FDA Standard	8734K25	00000


							5/32" Thick (-0.01" to 0.01" Tolerance)



									12"	24"	Extruded	0	185	2,400 to 4,000	1.5	White	UL 94 HB	FDA Standard	8734K35	00000


									36"	36"	Extruded	0	185	2,400 to 4,000	1.5	White	UL 94 HB	FDA Standard	8734K43	00000
									40"	72"	Extruded	0	185	2,400 to 4,000	1.5	White	UL 94 HB	FDA Standard	8734K26	00000


									3/16" Thick (-0.012" to 0.012" Tolerance)



											12"	24"	Extruded	0	185	2,400 to 4,000	1.5	White	UL 94 HB	FDA Standard	8734K36	00000


											36"	36"	Extruded	0	185	2,400 to 4,000	1.5	White	UL 94 HB	FDA Standard	8734K44	00000
											40"	72"	Extruded	0	185	2,400 to 4,000	1.5	White	UL 94 HB	FDA Standard	8734K27	000000


1/4" Thick (-0.03" to 0.03" Tolerance)



											12"	24"	Extruded	0	185	2,400 to 4,000	1.5	White	UL 94 HB	FDA Standard	8734K37	00000


											36"	36"	Extruded	0	185	2,400 to 4,000	1.5	White	UL 94 HB	FDA Standard	8734K45	00000
											40"	72"	Extruded	0	185	2,400 to 4,000	1.5	White	UL 94 HB	FDA Standard	8734K28	000000

Ultra-Electrically-Insulating Rexolite Polystyrene Sheets

Known for its electrical insulating properties, these sheets are often used for cable connectors, electrical housings, and in microwave applications. This material is also called Rexolite.

	Lg.	Fabrication	Min. Temp., ° F	Max. Temp., ° F	Tensile Strength, psi	Impact Strength, ft·lbf/in	Color	Specs. Met	Food Industry Std.		Each
1/8" Thick (0" to 0.008" Tolerance)



	6"	6"	Cast	-75	212	9,000	0.3	Semi-Clear Off-White	Fed. Spec. L-P-516	FDA Standard	1491T11	000000


	6"	12"	Cast	-75	212	9,000	0.3	Semi-Clear Off-White	Fed. Spec. L-P-516	FDA Standard	1491T21	000000
	12"	12"	Cast	-75	212	9,000	0.3	Semi-Clear Off-White	Fed. Spec. L-P-516	FDA Standard	1491T31	000000


	1/4" Thick (0" to 0.008" Tolerance)



			6"	6"	Cast	-75	212	9,000	0.3	Semi-Clear Off-White	Fed. Spec. L-P-516	FDA Standard	1491T12	00000


			6"	12"	Cast	-75	212	9,000	0.3	Semi-Clear Off-White	Fed. Spec. L-P-516	FDA Standard	1491T22	000000
			12"	12"	Cast	-75	212	9,000	0.3	Semi-Clear Off-White	Fed. Spec. L-P-516	FDA Standard	1491T32	000000


			1/2" Thick (0" to 0.012" Tolerance)



					6"	6"	Cast	-75	212	9,000	0.3	Semi-Clear Off-White	Fed. Spec. L-P-516	FDA Standard	1491T13	00000


					6"	12"	Cast	-75	212	9,000	0.3	Semi-Clear Off-White	Fed. Spec. L-P-516	FDA Standard	1491T23	000000
					12"	12"	Cast	-75	212	9,000	0.3	Semi-Clear Off-White	Fed. Spec. L-P-516	FDA Standard	1491T33	000000

Easy-Thermoform Polystyrene Strips

Often fabricated into signs, packaging, and light duty housings, these strips are easy to thermoform.

									2 ft. Long		4 ft. Long
	Wd.	Fabrication	Temp., ° F	Tensile Strength, psi	Impact Strength, ft·lbf/in	Color	Flammability Rating	Food Industry Std.		Each		Each
1/8" Thick (-0.013" to 0.013" Tolerance)



		2"	Extruded	0 to 185	2,400 to 4,000	1.5	White	UL 94 HB	FDA Standard	1195N22	00000	1195N21	00000


		4"	Extruded	0 to 185	2,400 to 4,000	1.5	White	UL 94 HB	FDA Standard	1195N42	0000	1195N41	0000
		6"	Extruded	0 to 185	2,400 to 4,000	1.5	White	UL 94 HB	FDA Standard	1195N62	0000	1195N61	0000
		8"	Extruded	0 to 185	2,400 to 4,000	1.5	White	UL 94 HB	FDA Standard	1195N82	0000	1195N81	00000


		3/16" Thick (-0.019" to 0.019" Tolerance)



				2"	Extruded	0 to 185	2,400 to 4,000	1.5	White	UL 94 HB	FDA Standard	1195N24	0000	1195N23	0000


				4"	Extruded	0 to 185	2,400 to 4,000	1.5	White	UL 94 HB	FDA Standard	1195N44	0000	1195N43	0000
				6"	Extruded	0 to 185	2,400 to 4,000	1.5	White	UL 94 HB	FDA Standard	1195N64	0000	1195N63	00000
				8"	Extruded	0 to 185	2,400 to 4,000	1.5	White	UL 94 HB	FDA Standard	1195N84	0000	1195N83	00000


				1/4" Thick (-0.025" to 0.025" Tolerance)



						2"	Extruded	0 to 185	2,400 to 4,000	1.5	White	UL 94 HB	FDA Standard	1195N26	0000	1195N25	0000


						4"	Extruded	0 to 185	2,400 to 4,000	1.5	White	UL 94 HB	FDA Standard	1195N46	0000	1195N45	00000
						6"	Extruded	0 to 185	2,400 to 4,000	1.5	White	UL 94 HB	FDA Standard	1195N66	0000	1195N65	00000
						8"	Extruded	0 to 185	2,400 to 4,000	1.5	White	UL 94 HB	FDA Standard	1195N86	00000	1195N85	00000

Easy-Thermoform Polystyrene Rods

Easy to thermoform, these rods are often molded into parts for displays and shelves.

	Dia. Tolerance	Fabrication	Min. Temp., ° F	Max. Temp., ° F	Tensile Strength, psi	Impact Strength, ft·lbf/in	Flammability Rating	Food Industry Std.	Choose a Length, ft.		Per Ft.
White



	1/4"	0.000" to 0.1"	Extruded	-10	170	2,400 to 4,000	1.5	UL 94 HB	FDA Standard	8	8720K323	00000


	3/8"	0.000" to 0.1"	Extruded	-10	170	2,400 to 4,000	1.5	UL 94 HB	FDA Standard	8	8720K331	0000
	1/2"	0.000" to 0.1"	Extruded	-10	170	2,400 to 4,000	1.5	UL 94 HB	FDA Standard	8	8720K341	0000
	5/8"	0.000" to 0.1"	Extruded	-10	170	2,400 to 4,000	1.5	UL 94 HB	FDA Standard	1 , 2 , 3 , 4 , 5 , 6 , 7 , 8	8720K35	0000
	3/4"	0.000" to 0.1"	Extruded	-10	170	2,400 to 4,000	1.5	UL 94 HB	FDA Standard	1 , 2 , 3 , 4 , 5 , 6 , 7 , 8	8720K36	0000
	1"	0.000" to 0.1"	Extruded	-10	170	2,400 to 4,000	1.5	UL 94 HB	FDA Standard	1 , 2 , 3 , 4 , 5 , 6 , 7 , 8	8720K37	00000
	1 1/2"	0.000" to 0.1"	Extruded	-10	170	2,400 to 4,000	1.5	UL 94 HB	FDA Standard	1 , 2 , 3 , 4 , 5 , 6 , 7 , 8	8720K38	00000
	2"	0.000" to 0.1"	Extruded	-10	170	2,400 to 4,000	1.5	UL 94 HB	FDA Standard	1 , 2 , 3 , 4 , 5 , 6 , 7 , 8	8720K39	00000

Ultra-Electrically-Insulating Rexolite Polystyrene Rods

These rods are made of a material known as Rexolite. They are electrically insulating and often used for cable connectors, electrical housings, and in microwave applications.

	Dia. Tolerance	Fabrication	Min. Temp., ° F	Max. Temp., ° F	Tensile Strength, psi	Impact Strength, ft·lbf/in	Food Industry Std.	Choose a Length, ft.		Per Ft.
Off-White



	1/8"	-0.002" to 0.002"	Cast	-75	212	9,000	0.3	FDA Standard	1 , 2 , 4	1491T61	00000


	1/4"	-0.002" to 0.002"	Cast	-75	212	9,000	0.3	FDA Standard	1 , 2 , 4	1491T62	0000
	3/8"	-0.002" to 0.002"	Cast	-75	212	9,000	0.3	FDA Standard	1 , 2 , 4	1491T63	0000
	1/2"	-0.002" to 0.002"	Cast	-75	212	9,000	0.3	FDA Standard	1 , 2 , 4	1491T64	0000
	3/4"	-0.002" to 0.002"	Cast	-75	212	9,000	0.3	FDA Standard	1 , 2 , 4	1491T65	00000
	1"	-0.002" to 0.002"	Cast	-75	212	9,000	0.3	FDA Standard	1 , 2 , 4	1491T66	00000