Cork & Rubber

Composition Cork and cork and rubber are excellent gasket materials manufactured by binding composition cork and introducing rubber in cork and rubber products. Rubber polymers available include neoprene and nitrile as well as more exotic elastomeric alloys such as viton & silicone.

Blaylock Gasket & Packing stocks different gauges of cork and cork and rubber in different rubber binders. We also have access to any polymers your requirements specify. Cork and rubber gaskets are used in a variety of applications including the automotive, railroad, aviation and agricultural machinery industries.

Additionally these materials can be used for gasketing purposes for machinery, pumps, meters, transformers and public utilities to name a few applications.

CORK AND RUBBER PRODUCTS

P/N	Description	Economical	Temp Resistance	Ozone Resistance	Oil/fuel Resistance	Mild fluid Resistance	Compressibility	Bolt Pressure	Flange Irregularity	Resist Environmental Deterioriation	SAE-AMS-C-6183 Type 1
BC351	Medium density reclaimed Cork/Rubber material.	X	M			X
CR55R	Cork/Synthetic rubber, Used in natural gas meters.	X			G					X
CR75	Cork/Hypalon rubber,		H	X	G		M
GT580	Cork/EPDM rubber material.		H	X			M
GT590	Cork/Viton material		H				L
HC50	Cork/Nitrile rubber				G		H	L
HC60	Cork/Nitrile rubber				G		M	M
HC80	Cork/Nitrile rubber;				G		L	H
M711	Cork/Synthetic rubber										Class 1 Grade A
M712	Cork/Synthetic rubber										Class 1 Grade B
M713	Cork/Synthetic rubber										Class 1 Grade C
M721	Cork/Synthetic rubber										Class 2 Grade A
M722	Cork/Synthetic rubber										Class 2 Grade B
M723	Cork/Synthetic rubber										Class 2 Grade C
NC40	Cork/Neoprene rubber				G		H	L	X
NC55	Cork/Neoprene rubber, red in color				G			L	X
NC60	Cork/Neoprene rubber				G		M
NC80	Cork/Neoprene rubber				G		L	H
NCA45	Cork/Synthetic rubber;				G
NCA50	Cork/Synthetic rubber	X			G
SG630	Cork/Vamac rubber		L H				L
SG700	Cork/Silicone rubber		L H			X
SP50	Cork/Nitrile sponge rubber				G		H	L
SP51	Cork/Hypalon sponge rubber		H		G		H	L
SP52	Cork/Neoprene sponge rubber				M
SP74	Cork/SBR sponge rubber						H
			L - Low Temps		X = Good Resistance		L - Low
			M - Mild Temps		M = Moderate Resistance		M - Medium
			H - High Temps				H - High

CHECK OUT THE SPECS BELOW

	BC351 Specs	Medium density reclaimed Cork/Rubber material. Economical material for use in applications where very mild heat and/or very mild fluid resistance.
	CR55R Specs	Cork/Synthetic rubber, economical, with good oil and fuel sealing properties, and resistance to environmental deterioration. Used in natural gas meters.
	CR75 Specs	Cork/Hypalon rubber, medium compressibility. Good heat, ozone, and oil resistance. Used for OE oil and transmission pan gaskets.
	GT580 Specs	A high quality, medium compressible, Cork/EPDM rubber material. Compounded specially for ozone, weathering, and heat resistance.
	GT590 Specs	A high quality, low compressible, Cork/Viton material. Used in applications where high heat resistance is required.
	HC50 Specs	Cork/Nitrile rubber, high compressibility. Good oil and fuel resistance. Offers low swell in fuels and oils. Excellent choice where bolt pressures are low.
	HC60 Specs	Cork/Nitrile rubber, medium compressibility. Good oil and fuel resistance. Performs well with fuel and oil under medium bolt pressure.
	HC80 Specs	Cork/Nitrile rubber, low compressibility. Performs well with fuel and oil exposure under high bolt pressure. Recommended in fuel pumps and meters.
	M711 Specs	Cork/Synthetic rubber. Certifiable to SAE-AMS-C-6183 Type 1, Class 1, Grade A.
	M712 Specs	Cork/Synthetic rubber. Certifiable to SAE-AMS-C-6183 Type 1, Class 1, Grade B.
	M713 Specs	Cork/Synthetic rubber. Certifiable to SAE-AMS-C-6183 Type 1, Class 1, Grade C.
	M721 Specs	Cork/Synthetic rubber. Certifiable to SAE-AMS-C-6183 Type 1, Class 2, Grade A.
	M722 Specs	Cork/Synthetic rubber. Certifiable to SAE-AMS-C-6183 Type 1, Class 2, Grade B.
	M723 Specs	Cork/Synthetic rubber. Certifiable to SAE-AMS-C-6183 Type 1, Class 2, Grade C.
	NC40 Specs	Cork/Neoprene rubber, high compressibility. Good oil resistance. Used where high flange irregularity occurs.
	NC55 Specs	Cork/Neoprene rubber, red in color. Good oil resistance. Used where flange irregularity occurs, under low sealing pressure.
	NC60 Specs	Cork/Neoprene rubber, medium compressibility. Good oil resistance. Used in air or refrigeration compressors, among other applications.
	NC80 Specs	Cork/Neoprene rubber, low compressibility. Good oil resistance. High tensile strength and low compression set. Use with high bolt pressure.
	NCA45 Specs	Cork/Synthetic rubber, medium oil resistance. Used in most automotive aftermarket sealing applications including valve covers, oil pans, and transmission pans.
	NCA50 Specs	Cork/Synthetic rubber, economical with good oil resistance. General purpose sealing material used in a variety of applications.
	SG630 Specs	Cork/Vamac rubber, low compressibility. Good heat, and low temperature resistance. Used for sealing higher flange loads.
	SG700 Specs	Cork/Silicone rubber, high quality, with moderate resistance to fluids. Well suited where operational temperatures are extremely high or low.
	SP50 Specs	Cork/Nitrile sponge rubber, highly compressible. Good oil resistance. It’s softness provides good sealing properties under low flange pressures.
	SP51 Specs	Cork/Hypalon sponge rubber, high compressibility. Good heat and oil resistance. It’s softness provides good sealing properties under low flange pressures.
	SP52 Specs	Cork/Neoprene sponge rubber. Moderate oil resistance. Used in oil sealing in low torque applications. Also used for die ejection, cushioning, and anti-vibration.
	SP74 Specs	Cork/SBR sponge rubber. Highly compressible. Used for die ejection, noise reduction, matting, cushioning, and fatigue and compression mats.

ASTM test method			BC351	CR55R	CR75	GT580	GT590
	Rubber Binder		Polymeric	Synthetic	Hypalon	EPDM	EVA
	Hardness, Shore A		-	50 - 70	50 - 70	55 - 75	60 - 80
	Density, lbs/sq ft	F1315	30 min.	35 - 55	37 - 55	35 min.	43 - 53
	Tensile, psi, min.	F152, B	110	150	225	150	325
	Compressibility, @ 400 PSI, %	F36, F	20 - 40	40 - 50	30 - 48	25 - 45	20 - 35
	Recovery, %, min.	F36, F	70	80	80	80	75
	Flexibility	F147	5	5	5	5	3
Volume Change	ASTM Oil #1, %	F146	-5 to +15	-10 to +10	5 max.	50 max.	+5 to +20
	IRM 903, %	F146	+15 to +50	+20 to +40	30 max.	-	+30 to +50
	Fuel A, %	F146	-5 to +15	0 to +20	-	-	-


ASTM test method			HC50	HC60	HC80	NC40	NC55
	Rubber Binder		Nitrile	Nitrile	Nitrile	Neoprene	Neoprene
	Hardness, Shore A		50 - 70	50 - 80	65 - 86	30 min.	50 - 65
	Density, lbs/sq ft	F1315	32 - 50	40 - 55	50 - 68	40 - 60	35 - 45
	Tensile, psi, min.	F152, B	175	200	250	100	139
	Compressibility, @ 400 PSI, %	F36, F	30 - 50	25 - 50	10 - 30	45 - 60	35 - 55
	Recovery, %, min.	F36, F	80	80	75	80	80
	Flexibility	F147	5	5	5	5	5
Volume Change	ASTM Oil #1	F146	-10 to +15	-10 to +10	-10 to +10	-15 to 0	-2 to +20
	IRM 903	F146	-5 to +20	-2 to +15	-8 to +15	+5 to +30	+15 to +50
	Fuel A	F146	-5 to +10	-5 to +10	-5 to +10	-5 to +15	0 to +25
			UL listed	UL listed	UL listed


ASTM test method			NC60	NC80	NCA45	NCA50	SG630
	Rubber Binder		Neoprene	Neoprene	Synthetic	Synthetic	Eth. Acrylic
	Hardness, Shore A		55 - 75	65 - 85	50 - 70	50 - 70	-
	Density, lbs/sq ft	F1315	45 - 65	50 - 70	34 - 47	35 - 55	40 - 60
	Tensile, psi, min.	F152, B	200	250	135	150	400
	Compressibility, @ 400 PSI, %	F36, F	23 - 40	15 - 30	30 - 55	40 - 50	20 - 35
	Recovery, %, min.	F36, F	80	80	75	80	75
	Flexibility	F147	5	5	5	5	5
Volume Change	ASTM Oil #1	F146	-5 to +20	-10 to +10	-10 to +10	-10 to +10	-5 to +15
	IRM 903	F146	+15 to +55	+5 to +50	+5 to +40	+20 to +40	+15 to +40
	Fuel A	F146	0 to +20	0 to +15	0 to +15	0 to +20	0 to +15


ASTM test method			SG700	SP50	SP51	SP52	SP74
	Rubber Binder		Silicone	Nitrile	Hypalon	Neoprene	SBR
	Hardness, Shore A		60 - 80	40 - 60	45 - 60	46 - 66	45 - 60
	Density, lbs/sq ft	F1315	-