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Allstate Gasket Reference
Typical Properties of Standard Materials
Neoprene | Hypalon | EPDM | Isoprene | Nitrile
Natural Rubber | Silicone | Butyl | Fluoroelastomer | SBR


Neoprene CR
(Chloroprene polymer)
General Notes: Application problems may occur when using blended or commercial grades of neoprene sheet of unknown quality levels in contact with oil, solvents and fuels. Where high oil or fuel resistance is required, the fabricator and user need to specify one of the following:
an ASTM call-out
a military specification
an ASTM-specified oil resistance level based on an ASTM test

Resistant to: Moderate chemicals and acids, ozone, oils, fats, greases, many oils, and solvents. Good oil and petroleum-based solvent resistance. Good weathering and ozone resistance. Neoprene may be blended with SBR rubber to achieve an economically priced sheet for moderately oil resistant applicants.

Attacked by:
Strong oxidizing acids, esters, ketones, chlorinated, aromatic and nitro hydrocarbons. Poor resistance to degreaser solvents. Content levels of neoprene can vary widely.

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Hypalon CSM
(Chlorosulfonated polyethylene)

General Notes:
Tear resistance is fair. Fair resistance to ketones and others.

Resistant to: Resists corrosive chemicals. Good oil resistance, ozone resistance, heat resistance and weathering resistance. Similar to Neoprene with improved acid and ozone resistance

Attacked by:
Poor resistance to aldehydes, aromatic solvents. esters, and cholorinated solvents. Concentrated oxidizing acids, esters, ketones, chlorinated, aromatic and nitro hydrocarbons.

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EPDM, EPM
(Ethylene Propylene copolymer and terpolymer)

Resistant to
: Water, steam and brake fluids. Excellent resistance to ozone, sunlight and oxygen. Excellent resistance to acid, alkali and ketones. Excellent heat resistance and aging.

Attacked by:
Mineral oils and solvents, aromatic hydrocarbons. Poor resistance to fuels, oils and alcohols.

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Isoprene (IR)
Similar to natural rubber.

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Nitrile NBR
(Butadiene, Acrylonitrile copolymer)
General Notes: Application problems may occur when using Nitrite of unknown quality levels in extreme oil-resistance applications or in contact with fuels and solvents. Content levels of nitrite can vary widely. Where oil or fuel resistance is required, the fabricator and user need to specify one of the following:
an ASTM call-out
a military specification
an ASTM-specified oil-resistance level based on an ASTM test (e.g. oil swell)

Resistant to
: Resistant to a broader range of aromatic hydrocarbons than neoprene. Resists many hydrocarbons, fats, oils, greases, solvents, fuels and hydraulic fluids, chemicals. Nitrile may be blended with SBR rubber to achieve an economically priced sheet or moderately oil resistant applications.

Attacked by:
Ozone, ketones, esters, aldehydes, chlorinated and nitro hydrocarbons.

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Natural Rubber
Isoprene NR, IR
(Polyisoprene)

General Notes:
Good gasket material due to excellent physical properties such as resilience, tear strength and wear resistance. Natural rubber is used effectively as sand and shot blast curtain material because of it's high abrasion resistance and resilience.

Resistant to
: Most moderate wet or dry chemicals, organic acids, alcohols, ketones, aldehydes.

Attacked by:
Deteriorates when exposed to oils, fuels, solvents,  hydraulic fluids strong acids, fats, oils, greases, most hydrocarbons. Poor resistance to sunlight, ozone and oxygen.

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Silicone
Si, VMQ
(Organic silicone polymer)

General Notes:
Excellent weathering properties and resists ozone and oxygen attacks. Long service life can be expected at 200F. to 400F. Physical properties (tensile, abrasion, tear and cut growth) are fair.

Resistant to
: Excellent properties for both hot and cold temperature extremes. Moderate or oxidizing chemicals, ozone, concentrated sodium hydroxide

Attacked by:
Poor resistance to solvents, oils, fuels and hydrocarbons. Fair performance when exposed to concentrated acids, alkalis, solvents, dilute sodium hydroxide.

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Butyl
IIR
(Isobutylene, Isoprene, polymer)

General Notes:
Excellent electrical resistance. Low permeability to air. Cold weather properties are fair.

Resistant to
: Excellent resistance to acid and alkali. Excellent weathering properties and heat resistance. Water and steam.

Attacked by:
Poor resistance fuels, oil, petroleum solvents, coal, tar, solvents, aromatic hydrocarbons.

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Fluoroelastomer
(Standard fluorocarbon dipolymer 66% fluorine)

General Notes:
High cost of flouoroelastomer may limit usage to extreme applications. Resilience is low and tear strength is limited unless certain compounding steps are taken to improve it. Impact resistance is fair.

Resistant to:
All aliphatic, aromatic and halogenated hydrocarbons, acids, animal and vegetable oils.

Attacked by:
Ketones, low molecular weight esters and alcohols and nitro-containing compounds.

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SBR
Styrene-Butadiene , BR
(Styrene, Butadiene Copolymer, Polybutadiene)

General Notes:
Can be compounded for use as skirtboard rubber, lining rubber, conveyor belt covers, tires and other extremely demanding applications. Used as gasket material and as an economical general purpose sheet.

Resistant to
: Good abrasion resistance and excellent impact and cut-and-gouged resistance. Similar to natural rubber.

Attacked by:
Similar to natural rubber.

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Contact Us! M-F 7:30AM - 5PM EST � Tel: (631) 254-4050 � Fax: (631) 254-4330

Allstate Gasket provides a wide range of standard and custom gaskets, packing, gasket material in rolls, sheets and strips. We provide services including stripping, slitting, vulcanize, die cutting and die cut gaskets and more. We supply Deacon Sealants. Our products are used in applications including boiler, manhole and handhole gaskets, o-rings, packing, compressed non-asbestos
, custom cut rubber stencils, rubber products, molded rubber, extruded rubber, fluid sealing products, PTFE, Viton�, Flexitalic, Hypalon�, EPDM, Buna-N, vegetable fiber, sponge and more materials. We provide specialized gasket making and packing tools including gasket cutter kits, gasket punch sets, dovetail punch, gasket making machines and more.

IMPORTANT DISCLAIMER: All information provided on this site is for reference. Always perform your own tests and acquire further information to determine product suitability. While we make effort to provide accurate information, we cannot be held responsible for errors either of omission or typographical. Allstate Gaskets assumes no responsibility for the use or suitability of any product.

Email: info@allstategasket.com
Tel: (631) 254-4050 � Fax: (631) 254-4330
Allstate Gasket, Inc � 31 Prospect Place � Deer Park, New York 11729-3713 USA

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