The Seal to Trust for Tough Sealing Applications

For demanding sealing applications when customers require the very best, Kalrez® parts manufactured only by DuPont™ Performance Elastomers, are the elastomer seals of choice. Supplied in standard O-rings or custom shapes, Kalrez® resists over 1,800 different chemicals while offering the high temperature stability of PTFE (327°C) and low temperatures down to –42 °C

Kalrez® is the proven way to cut costs in pumps and process equipment

Advanced properties help maintain seal integrity, reduce maintenance and operating costs and improve safety. Kalrez® parts provide reliable, long-term service with a wide range of aggressive industrial and electronic grade chemicals. Contact Us for more information.

Kalrez Guide for Safety in Handling

Kalrez® Compound Industry Segment Hardness Shore A Description/Application 100% Modulus Mpa (Psi) Colour Max. Service Temp
Spectrum™ 0040 Chemical & Chemical Transportation 70 Low temperature environments where significant chemical resistance and elasticity are required 6.6 (959) Black


Kalrez® 0090 Oil and Gas 95 Meets NORSOK M-710 Rev. 2 Requirements for Rapid Gas Decompression


Black 250°C
Spectrum™ 7075 Chemical and Mineral Processing 75 Highest temperature resistance, lowest compression set, temperature cycling 7.6 (1,100) Black 327°C
Spectrum™ 6375 Chemical and Mineral Processing 75 Outstanding performance in the widest possible range of chemicals and temperatures. Natural Gas Sampling 7.2 (1,050) Black 275°C
Spectrum™ 6380 Chemical and Mineral Processing 80 Developed specifically for hot aggressive amine environments 6.89 (1,000) Cream 225°C
4079 Chemical and Mineral Processing 75 High temperature, low compression set 7.2 (1,050) Black 316°C
1050LF Chemical and Mineral Processing 82 General purpose hot water/steam, amines 12.4 (1,800) Black 288°C
1058 Chemical Processing 65 Softest compound for low sealing force applications 4.7 (675) Black 260°C
2037 Chemical Processing/ Semiconductor 79 White filled, high purity, general chemical resistance 6.2 (900) White 218°C
2035 Chemical Processing/ Semiconductor 85 Suitable for Ethylene Oxide 8.61 (1,250) Black 220°C
Spectrum™ 7090 Chemical and Mineral Processing/Oil & Gas Exploration 90 Excellent explosive decompression resistance, low compression set and high temperature resistance 15.5 (2,248) Black 325°C
3018 Chemical and Mineral processing/Oil & Gas Exploration 91 High hardness, high modulus, extrusion resistance 16.9 (2,450) Black 288°C
3065 Oil and Gas industry 90 High hardness, high modulus, extrusion resistance, custom parts N/A Black 288°C
6885 Spray paint Application only 75 Spray Systems 6.89 (1,000) Black 270°C
6880 Spray paint Application only 70 Spray Systems 2.48 (360) White 250°C
6230 Pharmaceutical & Food Grade 75 Superior chemical resistance and low contamination from extractables;FDA, USP Class VI, FCN 000101 7.1 (1,020) Black 260°C
6221 Pharmaceutical & Food Grade 70 Superior chemical resistance and low contamination from extractables;FDA, USP Class VI, FCN 000102 7.2 (1,050) White 260°C
6230A Pharmaceutical & Food Grade 75 Sanitary Seals 7.1 (1,020) Black 260°C
7075UP Semiconductor 75 Recommended compound for thermal applications 7.6 (1,100) Black 327°C
6375UP Semiconductor 75 Wet process applications, low elemental extractables, static and dynamic applications 7.2 (1,050) Black 275°C
4079UP Semiconductor 75 Thermal applications 7.2 (1,050) Black 316°C
2037UP Semiconductor 79 High Purity for clean room environment 6.2 (900) White 218°C
8002 Semiconductor 69 Select semiconductor plasma and gas deposition applications, low particle generation 2.9 (420) Clear 250°C
Sahara™ 8085 Semiconductor 80 Plasma and gas deposition, HDPCVD, PECVD, SACVD, Etch, Ash, low particle generation o-rings and bonded doors 7.5 (1,085) Beige 240°C
Sahara™ 8475 Semiconductor 60 Thermal applications 2.2 (320) White 300°C
Sahara™ 8575 Semiconductor 62 Etch - low weight loss in oxygen and fluorine based plasmas 2.5 (360) White 300°C
9100 Semiconductor 74 High hardness, high modulus, excellent resistance 4.3 (620) Amber translucent 300°C