Principal table of the compounds

In these tables we have illustrated in detail (see link in table) some of the compounds that are most commonly used in the production of O-Rings specifying their availability by grades of hardness and most common use.
Base elastomer (coding DIN/ISO 1629) Code Standard step hardness of 5° shore Colour Other colour Principal characteristics Standard used Type Approved
Acrylo-nitrile butadiene (NBR) ME0007 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90 Black No Very high nitrile, petrol resistant Compound for use in contact with oils (even aggressive ones), diesel and unleaded petrol fuels. Scarce resistance to low temperatures.  
Acrylo-nitrile butadiene (NBR) ME0015 40, 45, 50, 55, 60, 65, 70, 75, 80 Black No High elasticity Compound for use in systems where an above standard spring-back is required combined with an excellent Compression Set. Ideal for automatically assembled gaskets and O-Rings. Normal resistance to temperature and oils.  
Acrylo-nitrile butadiene (NBR) ME0020 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90 Black No Very low nitrile content. Resistant to low temperatures Compound for use at low and very low temperatures. Modest resistance to some oils and fuels.  
Acrylo-nitrile butadiene (NBR) ME0025 40, 45, 50, 55, 60, 65, 70 Black No Tear resistant, wear resistant Compound with exceptional elasticity as well as a very high resistance to tearing and fatigue. Ideal for membranes. Also suitable for use in contact with anticryptogramic and herbicide products.  
Acrylo-nitrile butadiene (NBR) ME0035 40, 45, 50, 55, 60, 65, 70 Black No Low nitrile content For use where good resistance to low temperatures is necessary combined with excellent physical and mechanical characteristics.  
Acrylo-nitrile butadiene (NBR) ME0055 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90 Black No Resistant to ozone and light For use where excellent resistance to ozone and the deteriorating effect of light is required. Excellent resistance to saline mist.  
Acrylo-nitrile butadiene (NBR) ME0069 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90 Black No Eco Standard economical compound with physical and chemical characteristics similar to compound ME0070.  
Acrylo-nitrile butadiene (NBR) ME0070 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95 Black No Standard, gas resistant Standard compound with certified ingredients. Excellent mechanical characteristics and good resistance to temperature. Excellent compatibility with many fluids, oils and gases. Ideal for dynamic applications on pneumatic and hydraulic apparatus. EN549 CIRC102M.S. D.M.21/3/73
Acrylo-nitrile butadiene (NBR) ME0072 40, 45, 50B, 55, 60B, 65, 70B, 75, 80, 85, 90 White Yes Coloured Non toxic compound suitable for colouring. Possibility to produce almost all RAL and PANTONE® colours as well as specimen colours. Lesser mechanical characteristics with respect to the base compound.  
Acrylo-nitrile butadiene (NBR) ME0073 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90 Black No Anti abrasion Compound containing molybdenum bisulphide that considerably diminishes the coefficient of friction. Suitable for use in the presence of moving parts and where it is necessary to reduce friction.  
Acrylo-nitrile butadiene (NBR) ME0075 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90 Black No High nitrile content Compound for use when good resistance to oils and fuels in general is required. Good resistance to high temperatures. Excellent physical and mechanical characteristics.  
Acrylo-nitrile butadiene (NBR) ME0081 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90 Black No Perox Compound with peroxide acceleration. Exceptional spring-back and Compression Set. To use when it is necessary to guarantee a constant quality over time and very high efficiency.  
Acrylo-nitrile butadiene (NBR) ME0090 50, 55, 60, 65, 70, 75, 80, 85, 90 Yellow Yes Perox Coloured compound with peroxide acceleration. The peroxide acceleration makes up extremely well for the decay of the characteristics typical of coloured compounds.  
Acrylo-nitrile butadiene (NBR) ME0995 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90 Black No For drinking water Compound with excellent mechanical characteristics and a good Compression Set. Suitable for use in contact with hot and cold drinking water. WRC-WRAS, ACS
Acrylo-nitrile butadiene (NBR) ME0996 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90 Black No For drinking water Compound with very good mechanical characteristics and an excellent Compression Set. Suitable for use in contact with hot and cold drinking water according to all major world standards. WRC-WRAS, ACS, NSF61, DVGW-W270, DVGWKTW
Ethylene-propylene (EPM) Ethylene-propylene diene (EPDM) ME0111 35, 40, 45, 50, 55, 60, 65, 70, 75, 80 Grey Yes Dielectric Dielectric compound for articles that need excellent electrical insulation. Suitable for gaskets for electrical goods and wiring in general. Excellent mechanical characteristics and good resistance to saline mist.  
Ethylene-propylene (EPM) Ethylene-propylene diene (EPDM) ME0144 35, 40, 45, 50, 55, 60, 65, 70, 75, 80 Grey Yes Dielectric, without amines Compound very similar to ME0111 but produced with the use of amines. Excellent Compression Set.  
Ethylene-propylene (EPM) Ethylene-propylene diene (EPDM) ME0155 40, 45, 50, 55, 60, 65, 70, 75, 80 Black No Antacid Special compound for use in contact with acids and other very aggressive substances. Excellent resistance to temperature and a good Compression Set.  
Ethylene-propylene (EPM) Ethylene-propylene diene (EPDM) ME0160 40, 45, 50, 55, 60, 65, 70, 75, 80 Beige Yes Flame resistant Flame resistant compound with excellent physical and mechanical characteristics and a good Compression Set. Can be produced in many colours.  
Ethylene-propylene (EPM) Ethylene-propylene diene (EPDM) ME0166 50, 55, 60, 65, 70 Black No Vapour resistant Compound particularly suitable for use in the presence of vapour even under pressure and with traces of other components. Excellent resistance to temperature and good mechanical characteristics in general.  
Ethylene-propylene (EPM) Ethylene-propylene diene (EPDM) ME0170 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80 Black No Standard Standard compound for all uses. Suitable in contact with vapour (max. 140°C) and air up to 100°C. It also lends itself to the seal of fluids that are not of mineral origin. Good mechanical characteristics.  
Ethylene-propylene (EPM) Ethylene-propylene diene (EPDM) ME0175 40, 45, 50, 55, 60, 65G, 70B, 75, 80B Lilac Yes Coloured Compound suitable for colouring. Possibility to produce almost all RAL and PANTONE® colours as well as specimen colours. Lesser mechanical characteristics than the base compounds.  
Ethylene-propylene (EPM) Ethylene-propylene diene (EPDM) ME0176 50, 55, 60, 65, 70 Black No High elasticity Compound with an excellent elastic resilience and a very low Compression Set, very close to the one obtained with peroxide compounds. Ideal for seals that need guaranteed duration and a superior seal to the standard compound.  
Ethylene-propylene (EPM) Ethylene-propylene diene (EPDM) ME0182 50, 55, 60, 65, 70, 75, 80, 85, 90 Black No Perox Compound with an excellent elastic resilience and an exceptional Compression Set with peroxide acceleration. This compound is necessary for all applications in which it is necessary to guarantee a secure and long lasting seal.  
Ethylene-propylene (EPM) Ethylene-propylene diene (EPDM) ME0190 50, 55, 60, 65, 70, 75, 80, 85, 90 Light blue Yes Perox Coloured compound with peroxide acceleration. This compound combines the important characteristics typical of peroxide vulcanised compounds with the possibility of being coloured.  
Ethylene-propylene (EPM) Ethylene-propylene diene (EPDM) ME0195 50, 55, 60, 65, 70, 75, 80, 85, 90 Black No Perox very lowflattening Compound with exceptional Compression Set characteristics combined with continuous resistance to temperature. Particularly suitable for use in heating systems and similar uses where it is necessary to guarantee a constant seal for a long period of time and where the operating temperature is continuous.  
Ethylene-propylene (EPM) Ethylene-propylene diene (EPDM) ME0940 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90 Black No Perox, for drinking water Compound with exceptional mechanical characteristics and Compression Set. Type approved according to the principal world standards for use in contact with hot and cold drinking water. Excellent resistance to temperature. ACS, WRC-WRAS, DVGW-KTW, NSF61, EN681WA, EN681WB, DVGW-W270
Ethylene-propylene (EPM) Ethylene-propylene diene (EPDM) ME0942 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90 Black No For drinking water Compound for gaskets in contact with hot and cold drinking water. ACS, WRC-WRAS
Fluorocarbon (FPM o FKM) ME0201 50, 55, 60, 65, 65V, 70, 70V, 75, 80, 80V, 85, 90 Light green Yes For water and gas Compound with mechanical characteristics and a Compression Set that are very similar to compound ME0270, Type approved for use in contact with gas and in contact with hot and cold drinking water. NSF61, EN549
Fluorocarbon (FPM o FKM) ME0202 50, 55, 60, 65, 65V, 70, 70V, 75, 80, 85, 90 Black Yes Antacid Compound specially devised for use in contact with acids and their compounds. Ideal also in contact with anticryptogamics and very aggressive products. Good mechanical characteristics.  
Fluorocarbon (FPM o FKM) ME0211 50, 55, 60, 65, 70, 75, 80, 85, 90 Brown Yes Petrol resistant Compound for the production of articles utilised in contact with petrol, including alternative and distillate based types.  
Fluorocarbon (FPM o FKM) ME0220 50, 55, 60, 65, 70, 75, 80, 85, 90 Black Yes Vapour resistant Compound charged for use in the presence of vapour (160°C) even continuously and under pressure. Excellent mechanical characteristics and resistance to high temperatures.  
Fluorocarbon (FPM o FKM) ME0233 50, 55, 60, 65, 70, 75, 80, 85, 90 Black Yes High elasticity Compound with a better than average springback. Ideal automatically assembled for gaskets and O-Rings. Normal temperatures and characteristics.  
Fluorocarbon (FPM o FKM) ME0270 45, 50, 55, 60, 65, 65V, 70, 70V, 75, 80, 80V, 85, 90, 90V, 95 Black Yes Standard Standard compound that can also be coloured with good mechanical characteristics and resistance to high temperatures. Suitable for contact with gas. Good resistance to wear. EN549
Fluorocarbon (FPM o FKM) ME0274 50, 55, 60, 65, 70V, 75, 80, 85, 90 Green Yes Coloured Compound suitable for colouring. Possibility to produce almost all RAL and PANTONE® colours as well as specimen colours.  
Fluorocarbon (FPM o FKM) ME0275 70, 75, 80, 85, 90 Black Yes Eco Economical compound suitable for static and little stressed articles. Good Compression Set.  
Fluorocarbon (FPM o FKM) ME0299 60, 65, 70, 75, 80, 85, 90 Black No GLT GLT compound for use at low temperatures. Resistance also up to - 45°C. Standard physical and mechanical characteristics.  
Silicone (MVQ o VQM) ME0303 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80 Transparent Yes Transparent Compound only suitable for static seals. Exceptional transparency similar to glass. Slows down the characteristic yellowing of the finished product. Ideal for aesthetic articles.  
Silicone (MVQ o VQM) ME0305 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85 Brick red Yes Eco Compound only suitable for static seals. Normal mechanical characteristics and Compression Set.  
Silicone (MVQ o VQM) ME0306 20, 25, 30, 35, 40 Orange Yes Low hardness Compound only suitable for static seals with very low grades of hardness. Below average mechanical characteristics and Compression Set only just sufficient. Carefully evaluate the type of seal.  
Silicone (MVQ o VQM) ME0307 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80 Dark yellow Yes Gas resistant Compound only suitable for static seals. Low gas permeability. Excellent mechanical characteristics and Compression Set.  
Silicone (MVQ o VQM) ME0309 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80 Blue Yes Compression Compound only suitable for static seals and where an excellent Compression Set, low buckling under pressure and exceptional constancy are required. Suitable for use in contact with water.  
Silicone (MVQ o VQM) ME0320 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80 Dark grey Yes Tear resistant Compound only suitable for static seals. Formulation studied for articles that need a good resistance to tearing. Normal characteristics.  
Silicone (MVQ o VQM) ME0333 40, 45, 50, 55, 60, 65, 70, 75, 80 Bright red Yes Platinic Compound only suitable for static seals. Good Compression Set and very good mechanical characteristics. Exceptional elasticity. Characteristics very similar to Liquid Silicone. Platinic acceleration.  
Silicone (MVQ o VQM) ME0345 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80 Sky blue Yes Vapour resistant Compound only suitable for static seals. Use in presence of vapours guaranteed up to 140°C with excellent mechanical characteristics and Compression Set.  
Silicone (MVQ o VQM) ME0350 40, 45, 50, 55, 60, 65, 70, 75, 80 Beige Yes Flame resistant Compound only suitable for static seals. Formulation devised to extinguish flame. Suitable for safety articles, wiring and electrical goods.  
Silicone (MVQ o VQM) ME0365 30, 35, 40, 45, 50, 55, 60, 65, 70 Light yellow Yes Oil2 Compound only suitable for static seals. Normal mechanical characteristics and Compression Set. Self-lubricating formulation with the addition of 2 % of oil.  
Silicone (MVQ o VQM) ME0367 30, 35, 40, 45, 50, 55, 60, 65, 70 Light yellow Yes Oil4 Compound only suitable for static seals. Normal mechanical characteristics and Compression Set. Self-lubricating formulation with the addition of 4 % of oil.  
Silicone (MVQ o VQM) ME0369 30, 35, 40, 45, 50, 55, 60, 65, 70 Light yellow Yes Oil6 Compound only suitable for static seals. Normal mechanical characteristics and Compression Set. Self-lubricating formulation with the addition of 6 % of oil.  
Silicone (MVQ o VQM) ME0370 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90 Bright red Yes Standard Standard Compound for general use suitable only for static seals. Excellent mechanical characteristics and Compression Set. It lends itself particularly to pneumatic applications up to 210°C and to contact with water up to 100°C.  
Silicone (MVQ o VQM) ME0371 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85 White Yes Super Compound suitable only for static seals of medium/high range. Can be coloured in an excellent manner since it is transparent based. Mechanical characteristics and Compression Set superior to other silicone compounds. Ideal for uses that require certainty of seal.  
Silicone (MVQ o VQM) ME0399 40, 45, 50, 55, 60, 65, 70, 75, 80 Bright red Yes Platinic Eco Compound suitable only for static seals. Good Compression Set and very good mechanical characteristics. Exceptional elasticity. Characteristics very similar to liquid silicone.  
Silicone (MVQ o VQM) ME2020 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80 Bright red Yes Biomedical and alimentary Compound suitable only for use in static seals, it lends itself particularly to pneumatic applications where it has good performance up to 210°C. Type approved for contact with hot and cold drinking water. Corresponds to the characteristics of the medical and alimentary sectors, according to all the standards of those sectors.  
Styrene butadiene (SBR) ME0410 40, 45, 50, 55, 60, 65, 70, 75, 80 Black Yes Economical Economical compound for use in systems in contact with glycol based fluids and refrigerating fluids. Not suitable for contact with mineral oils, hydrocarbons and ozone. WRC-WRAS, DVGW-KTW, ACS, NSF61, DVGW-W270
Styrene butadiene (SBR) ME0470 40, 45, 50, 55, 60, 65, 70, 75, 80 Black Yes Standard Standard compound for use in systems in contact with glycol based fluids and refrigeratin fluids. Stable behaviour within an ample spectrum of temperatures: -50°/100°C. Not suitable for contact with mineral oils, hydrocarbons and ozone.  
Fluorosilicone (MFQ o FVQM) ME0555 40, 45, 50, 55, 60, 65, 70, 75, 80 Sky blue Yes Standard Coloured compound. This particular compound finds use in extreme applications, such as aeronautical ones, thanks to its high elasticity at both high and low temperatures, and its compatibility with fluids of different natures including mineral oils, hydrocarbons and air.  
Chloroprene (CR) ME0670 40, 45, 50, 55, 60, 65 70, 75, 80 Black No Standard Compound that presents good resistance to ageing and atmospheric agents, it is suitable for the sealing of saline solutions, ammonia and refrigerating gases.  
Chloroprene (CR) ME0677 40, 45, 50, 55, 60, 65, 70, 75, 80 Black No Flame resistant Capable of maintaining constant chemical and physical characteristics for an ample spectrum of temperatures, it presents a distinct capacity of resistance to direct flame. Suitable for use in domestic equipment.  
Vamac (EAM) ME0770 60, 65, 70, 75, 80 Black No Standard Compound suitable for use in contact with mineral oils even at high temperatures (160°C), it is resistant to ageing on contact with air and ozone up to temperatures of 180°C.  
Hydrogenated Nitrile (HNBR) ME0870 50, 55, 60, 65, 70, 70V, 75, 80, 85, 90 Black Yes Standard Usable in a wide range of pneumatic and hydraulic applications due to its high resistance to ageing and its compatibility with many fluids. Type approved for gas seals. It presents excellent mechanical properties and resists in hot air up to temperatures of 160°C. EN549
Urepan (AU) ME1070 50, 55, 60, 65, 70, 75, 80 Black Yes Standard Excellent resistance to wear and high elasticity, low gas permeability and good resistance to hydrolysis.  
Polyacrylate (ACM) ME1170 50, 55, 60, 65, 70, 75, 80 Black No Standard This is a compound that presents good resistance to ageing, excellent tolerance with lubricants of various natures, therefore ideal for applications in the automobile sector.  
Epichlorohydrin (ECO) ME1270 50, 55, 60, 65, 70, 75, 80 Black No Standard Usable in a wide range of pneumatic and hydraulic applications due to its high resistance to ageing and its compatibility with many fluids. Its low gas permeability allow its use in vacuum seal applications. Good elastic characteristics even at low temperatures.  
Butyl (IIR) ME1370 50, 55, 60, 65, 70, 75, 80 Black No Standard Good vacuum sealing and resistance to ageing caused by contact with air and ozone. High level of electrical insulation. Usable for seals in contact with refrigeration fluids.  
Butadiene (BR) ME1470 50, 55, 60, 65, 70, 75, 80 Black No Standard Very resistant to ageing and abrasion, conserves good elastic properties even at low temperatures.  
Chlorobutyl (CIIR) ME1570 50, 55, 60, 65, 70, 75, 80 Black No Standard Presents physical and chemical characteristics similar to compound IIR from which it derives. The addition of chlorine gives it greater elasticity and a low Compression Set value even at low temperatures.  
Chlorosulphonal- polyethylene (CSM) ME1670 50, 55, 60, 65, 70, 75, 80 Black Yes Standard Excellent resistance to ageing and good dielectric characteristics and flame resistance. Not suitable for use in contact with mineral oils and aromatic hydrocarbons.  
Perfluoro (FFPM or FFKM) (Hypalon) ME1770 50, 55, 60, 65, 70, 75, 80 Black Yes Standard Very high compatibility with many fluids and excellent resistance to ageing. Maintains its chemical and physical characteristics up to very high temperatures, close to 300°C. It is not usable in dynamic applications at low temperatures, between -25°C and -30°C, as it loses much elasticity and becomes fragile.  
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