

Kalrez® Spectrum™ 6375, designed specifically for the chemical process industry, combines new polymer technology with innovative patented curing technology. Compound 6375 is designed to give outstanding performance in the widest possible range of chemicals and temperatures. This product is an excellent choice for use in acids, bases, amines, steam, ethylene oxide, and many other aggressive chemicals. The new curing system also allows for a continuous upper service temperature of 275°C (525°F). This high temperature stability translates to increased chemical resistance over all temperature ranges, especially if high temperature process excursions occur. This combination of chemical and thermal resistance provides advantages for chemical processors. Today, chemical processors use several perfluoroelastomer parts, including compounds 4079. 1050LF, and 2035, to optimize chemical and thermal performance. Kalrez® Spectrum™ 6375 may be used in many applications to displace these products. However, if optimum chemical resistance is required, then applications must be individually reviewed for the optimum compound selection.
| ecatalog ePart Number | Compound | Size AS568- | Nominal Cross Section W | Actual Cross Section W | Actual Inside Diameter ID | Nominal Inside Diameter ID | Nominal Outside Diameter |
| 4-0017516 | Kalrez 6375 | 001 | 1/16 | .070 +-.003 | 0.029 | 1/32 | 3/32 |
| 4-0027516 | Kalrez 6375 | 002 | 1/16 | .070 +-.003 | 0.042 | 3/64 | 9/64 |
| 4-0037516 | Kalrez 6375 | 003 | 1/16 | .070 +-.003 | 0.056 | 1/16 | 3/16 |
| 4-0047516 | Kalrez 6375 | 004 | 1/16 | .070 +-.003 | 0.070 | 5/64 | 13/64 |
| 4-0057516 | Kalrez 6375 | 005 | 1/16 | .070 +-.003 | 0.101 | 3/32 | 7/32 |
| 4-0067516 | Kalrez 6375 | 006 | 1/16 | .070 +-.003 | 0.114 | 1/8 | 1/4 |
| 4-0077516 | Kalrez 6375 | 007 | 1/16 | .070 +-.003 | 0.145 | 5/32 | 9/32 |
| 4-0087516 | Kalrez 6375 | 008 | 1/16 | .070 +-.003 | 0.176 | 3/16 | 5/16 |
| 4-0097516 | Kalrez 6375 | 009 | 1/16 | .070 +-.003 | 0.208 | 7/32 | 11/32 |
| 4-0107516 | Kalrez 6375 | 010 | 1/16 | .070 +-.003 | 0.239 | 1/4 | 3/8 |
| 4-0117516 | Kalrez 6375 | 011 | 1/16 | .070 +-.003 | 0.301 | 5/16 | 7/16 |
| 4-0127516 | Kalrez 6375 | 012 | 1/16 | .070 +-.003 | 0.364 | 3/8 | 1/2 |
| 4-0137516 | Kalrez 6375 | 013 | 1/16 | .070 +-.003 | 0.426 | 7/16 | 9/16 |
| 4-0147516 | Kalrez 6375 | 014 | 1/16 | .070 +-.003 | 0.489 | 1/2 | 5/8 |
| 4-0157516 | Kalrez 6375 | 015 | 1/16 | .070 +-.003 | 0.551 | 9/16 | 11/16 |
| 4-0167516 | Kalrez 6375 | 016 | 1/16 | .070 +-.003 | 0.614 | 5/8 | 3/4 |
| 4-0177516 | Kalrez 6375 | 017 | 1/16 | .070 +-.003 | 0.676 | 11/16 | 13/16 |
| 4-0187516 | Kalrez 6375 | 018 | 1/16 | .070 +-.003 | 0.739 | 3/4 | 7/8 |
| 4-0197516 | Kalrez 6375 | 019 | 1/16 | .070 +-.003 | 0.801 | 13/16 | 15/16 |
| 4-0207516 | Kalrez 6375 | 020 | 1/16 | .070 +-.003 | 0.864 | 7/8 | 1 |
| 4-0217516 | Kalrez 6375 | 021 | 1/16 | .070 +-.003 | 0.925 | 15/16 | 1 1/16 |
| 4-0227516 | Kalrez 6375 | 022 | 1/16 | .070 +-.003 | 0.989 | 1 | 1 1/8 |
| 4-0237516 | Kalrez 6375 | 023 | 1/16 | .070 +-.003 | 1.051 | 1 1/16 | 1 3/16 |
| 4-0247516 | Kalrez 6375 | 024 | 1/16 | .070 +-.003 | 1.114 | 1 1/8 | 1 1/4 |
| 4-0257516 | Kalrez 6375 | 025 | 1/16 | .070 +-.003 | 1.176 | 1 3/16 | 1 5/16 |
| 4-0267516 | Kalrez 6375 | 026 | 1/16 | .070 +-.003 | 1.239 | 1 1/4 | 1 3/8 |
| 4-0277516 | Kalrez 6375 | 027 | 1/16 | .070 +-.003 | 1.301 | 1 5/16 | 1 7/16 |
| 4-0287516 | Kalrez 6375 | 028 | 1/16 | .070 +-.003 | 1.364 | 1 3/8 | 1 1/2 |
| 4-0297516 | Kalrez 6375 | 029 | 1/16 | .070 +-.003 | 1.489 | 1 1/2 | 1 5/8 |
| 4-0307516 | Kalrez 6375 | 030 | 1/16 | .070 +-.003 | 1.614 | 1 5/8 | 13/4 |
| 4-0317516 | Kalrez 6375 | 031 | 1/16 | .070 +-.003 | 1.739 | 1 3/4 | 1 7/8 |
| 4-0327516 | Kalrez 6375 | 032 | 1/16 | .070 +-.003 | 1.864 | 1 7/8 | 2 |
| 4-0337516 | Kalrez 6375 | 033 | 1/16 | .070 +-.003 | 1.989 | 2 | 2 1/8 |
| 4-0347516 | Kalrez 6375 | 034 | 1/16 | .070 +-.003 | 2.114 | 2 1/8 | 2 1/4 |
| 4-0357516 | Kalrez 6375 | 035 | 1/16 | .070 +-.003 | 2.239 | 2 1/4 | 2 3/8 |
| 4-0367516 | Kalrez 6375 | 036 | 1/16 | .070 +-.003 | 2.364 | 2 3/8 | 2 1/2 |
| 4-0377516 | Kalrez 6375 | 037 | 1/16 | .070 +-.003 | 2.489 | 2 1/2 | 2 5/8 |
| 4-0387516 | Kalrez 6375 | 038 | 1/16 | .070 +-.003 | 2.614 | 2 5/8 | 2 3/4 |
| 4-0397516 | Kalrez 6375 | 039 | 1/16 | .070 +-.003 | 2.739 | 2 3/4 | 2 7/8 |
| 4-0407516 | Kalrez 6375 | 040 | 1/16 | .070 +-.003 | 2.864 | 2 7/8 | 3 |
| 4-0417516 | Kalrez 6375 | 041 | 1/16 | .070 +-.003 | 2.989 | 3 | 3 1/8 |
| 4-0427516 | Kalrez 6375 | 042 | 1/16 | .070 +-.003 | 3.239 | 3 1/4 | 3 3/8 |
| 4-0437516 | Kalrez 6375 | 043 | 1/16 | .070 +-.003 | 3.489 | 3 1/2 | 3 5/8 |
| 4-0447516 | Kalrez 6375 | 044 | 1/16 | .070 +-.003 | 3.739 | 3 3/4 | 3 7/8 |
| 4-0457516 | Kalrez 6375 | 045 | 1/16 | .070 +-.003 | 3.989 | 4 | 4 1/8 |
| 4-0467516 | Kalrez 6375 | 046 | 1/16 | .070 +-.003 | 4.239 | 4 1/4 | 4 3/8 |
| 4-0477516 | Kalrez 6375 | 047 | 1/16 | .070 +-.003 | 4.489 | 4 1/2 | 4 5/8 |
| 4-0487516 | Kalrez 6375 | 048 | 1/16 | .070 +-.003 | 4.739 | 4 3/4 | 4 7/8 |
| 4-0497516 | Kalrez 6375 | 049 | 1/16 | .070 +-.003 | 4.989 | 5 | 5 1/8 |
| 4-0507516 | Kalrez 6375 | 050 | 1/16 | .070 +-.003 | 5.239 | 5 1/4 | 5 3/8 |
| 4-1027516 | Kalrez 6375 | 102 | 3/32 | .103 +-.003 | 0.049 | 1/16 | 1/4 |
| 4-1037516 | Kalrez 6375 | 103 | 3/32 | .103 +-.003 | 0.081 | 3/32 | 9/32 |
| 4-1047516 | Kalrez 6375 | 104 | 3/32 | .103 +-.003 | 0.112 | 1/8 | 5/16 |
| 4-1057516 | Kalrez 6375 | 105 | 3/32 | .103 +-.003 | 0.143 | 5/32 | 11/32 |
| 4-1067516 | Kalrez 6375 | 106 | 3/32 | .103 +-.003 | 0.174 | 3/16 | 3/8 |
| 4-1077516 | Kalrez 6375 | 107 | 3/32 | .103 +-.003 | 0.206 | 7/32 | 13/32 |
| 4-1087516 | Kalrez 6375 | 108 | 3/32 | .103 +-.003 | 0.237 | 1/4 | 7/16 |
| 4-1097516 | Kalrez 6375 | 109 | 3/32 | .103 +-.003 | 0.299 | 5/16 | 1/2 |
| 4-1107516 | Kalrez 6375 | 110 | 3/32 | .103 +-.003 | 0.362 | 3/8 | 9/16 |
| 4-1117516 | Kalrez 6375 | 111 | 3/32 | .103 +-.003 | 0.424 | 7/16 | 5/8 |
| 4-1127516 | Kalrez 6375 | 112 | 3/32 | .103 +-.003 | 0.487 | 1/2 | 11/16 |
| 4-1137516 | Kalrez 6375 | 113 | 3/32 | .103 +-.003 | 0.549 | 9/16 | 3/4 |
| 4-1147516 | Kalrez 6375 | 114 | 3/32 | .103 +-.003 | 0.612 | 5/8 | 13/16 |
| 4-1157516 | Kalrez 6375 | 115 | 3/32 | .103 +-.003 | 0.674 | 11/16 | 7/8 |
| 4-1167516 | Kalrez 6375 | 116 | 3/32 | .103 +-.003 | 0.737 | 3/4 | 15/16 |
| 4-1177516 | Kalrez 6375 | 117 | 3/32 | .103 +-.003 | 0.799 | 13/16 | 1 |
| 4-1187516 | Kalrez 6375 | 118 | 3/32 | .103 +-.003 | 0.862 | 7/8 | 1 1/16 |
| 4-1197516 | Kalrez 6375 | 119 | 3/32 | .103 +-.003 | 0.924 | 15/16 | 1 1/8 |
| 4-1207516 | Kalrez 6375 | 120 | 3/32 | .103 +-.003 | 0.987 | 1 | 1 3/16 |
| 4-1217516 | Kalrez 6375 | 121 | 3/32 | .103 +-.003 | 1.049 | 1/16 | 1 1/4 |
| 4-1227516 | Kalrez 6375 | 122 | 3/32 | .103 +-.003 | 1.112 | 1 1/8 | 1 5/16 |
| 4-1237516 | Kalrez 6375 | 123 | 3/32 | .103 +-.003 | 1.174 | 1 3/16 | 1 3/8 |
| 4-1247516 | Kalrez 6375 | 124 | 3/32 | .103 +-.003 | 1.237 | 1 1/4 | 1 7/16 |
| 4-1257516 | Kalrez 6375 | 125 | 3/32 | .103 +-.003 | 1.299 | 1 5/16 | 1 1/2 |
| 4-1267516 | Kalrez 6375 | 126 | 3/32 | .103 +-.003 | 1.362 | 1 3/8 | 1 9/16 |
| 4-1277516 | Kalrez 6375 | 127 | 3/32 | .103 +-.003 | 1.424 | 1 7/16 | 1 5/8 |
| 4-1287516 | Kalrez 6375 | 128 | 3/32 | .103 +-.003 | 1.487 | 1 1/2 | 1 11/16 |
| 4-1297516 | Kalrez 6375 | 129 | 3/32 | .103 +-.003 | 1.549 | 1 9/16 | 1 3/4 |
| 4-1307516 | Kalrez 6375 | 130 | 3/32 | .103 +-.003 | 1.612 | 1 5/8 | 1 13/16 |
| 4-1317516 | Kalrez 6375 | 131 | 3/32 | .103 +-.003 | 1.674 | 1 11/16 | 1 7/8 |
| 4-1327516 | Kalrez 6375 | 132 | 3/32 | .103 +-.003 | 1.737 | 1 3/4 | 1 15/16 |
| 4-1337516 | Kalrez 6375 | 133 | 3/32 | .103 +-.003 | 1.799 | 1 13/16 | 2 |
| 4-1347516 | Kalrez 6375 | 134 | 3/32 | .103 +-.003 | 1.862 | 1 7/8 | 2 1/16 |
| 4-1357516 | Kalrez 6375 | 135 | 3/32 | .103 +-.003 | 1.925 | 1 15/16 | 2 1/8 |
| 4-1367516 | Kalrez 6375 | 136 | 3/32 | .103 +-.003 | 1.987 | 2 | 2 3/16 |
| 4-1377516 | Kalrez 6375 | 137 | 3/32 | .103 +-.003 | 2.050 | 2 1/16 | 2 1/4 |
| 4-1387516 | Kalrez 6375 | 138 | 3/32 | .103 +-.003 | 2.112 | 2 1/8 | 2 5/16 |
| 4-1397516 | Kalrez 6375 | 139 | 3/32 | .103 +-.003 | 2.175 | 2 3/16 | 2 3/8 |
| 4-1407516 | Kalrez 6375 | 140 | 3/32 | .103 +-.003 | 2.237 | 2 1/4 | 2 7/16 |
| 4-1417516 | Kalrez 6375 | 141 | 3/32 | .103 +-.003 | 2.300 | 2 5/16 | 2 1/2 |
| 4-1427516 | Kalrez 6375 | 142 | 3/32 | .103 +-.003 | 2.362 | 2 3/8 | 2 9/16 |
| 4-1437516 | Kalrez 6375 | 143 | 3/32 | .103 +-.003 | 2.425 | 2 7/16 | 2 5/8 |
| 4-1447516 | Kalrez 6375 | 144 | 3/32 | .103 +-.003 | 2.487 | 2 1/2 | 2 11/16 |
| 4-1457516 | Kalrez 6375 | 145 | 3/32 | .103 +-.003 | 2.550 | 2 9/16 | 2 3/4 |
| 4-1467516 | Kalrez 6375 | 146 | 3/32 | .103 +-.003 | 2.612 | 2 5/8 | 2 13/16 |
| 4-1477516 | Kalrez 6375 | 147 | 3/32 | .103 +-.003 | 2.675 | 2 11/16 | 2 7/8 |
| 4-1487516 | Kalrez 6375 | 148 | 3/32 | .103 +-.003 | 2.737 | 2 3/4 | 2 15/32 |
| 4-1497516 | Kalrez 6375 | 149 | 3/32 | .103 +-.003 | 2.800 | 2 13/16 | 3 |
| 4-1507516 | Kalrez 6375 | 150 | 3/32 | .103 +-.003 | 2.862 | 2 7/8 | 3 1/16 |
| 4-1517516 | Kalrez 6375 | 151 | 3/32 | .103 +-.003 | 2.987 | 3 | 3 3/16 |
| 4-1527516 | Kalrez 6375 | 152 | 3/32 | .103 +-.003 | 3.237 | 3 1/4 | 3 7/16 |
| 4-1537516 | Kalrez 6375 | 153 | 3/32 | .103 +-.003 | 3.487 | 3 1/2 | 3 11/16 |
| 4-1547516 | Kalrez 6375 | 154 | 3/32 | .103 +-.003 | 3.737 | 3 3/4 | 3 15/16 |
| 4-1557516 | Kalrez 6375 | 155 | 3/32 | .103 +-.003 | 3.987 | 4 | 4 3/16 |
| 4-1567516 | Kalrez 6375 | 156 | 3/32 | .103 +-.003 | 4.237 | 4 1/4 | 4 7/16 |
| 4-1577516 | Kalrez 6375 | 157 | 3/32 | .103 +-.003 | 4.487 | 4 1/2 | 4 11/16 |
| 4-1587516 | Kalrez 6375 | 158 | 3/32 | .103 +-.003 | 4.737 | 4 3/4 | 4 15/16 |
| 4-1597516 | Kalrez 6375 | 159 | 3/32 | .103 +-.003 | 4.987 | 5 | 5 3/16 |
| 4-1607516 | Kalrez 6375 | 160 | 3/32 | .103 +-.003 | 5.237 | 5 1/4 | 5 7/16 |
| 4-1617516 | Kalrez 6375 | 161 | 3/32 | .103 +-.003 | 5.487 | 5 1/2 | 5 11/16 |
| 4-1627516 | Kalrez 6375 | 162 | 3/32 | .103 +-.003 | 5.737 | 5 3/4 | 5 15/16 |
| 4-1637516 | Kalrez 6375 | 163 | 3/32 | .103 +-.003 | 5.987 | 6 | 6 3/16 |
| 4-1647516 | Kalrez 6375 | 164 | 3/32 | .103 +-.003 | 6.237 | 6 1/4 | 6 7/16 |
| 4-1657516 | Kalrez 6375 | 165 | 3/32 | .103 +-.003 | 6.487 | 6 1/2 | 6 11/16 |
| 4-1667516 | Kalrez 6375 | 166 | 3/32 | .103 +-.003 | 6.737 | 6 3/4 | 6 15/16 |
| 4-1677516 | Kalrez 6375 | 167 | 3/32 | .103 +-.003 | 6.987 | 7 | 7 3/16 |
| 4-1687516 | Kalrez 6375 | 168 | 3/32 | .103 +-.003 | 7.237 | 7 1/4 | 7 7/16 |
| 4-1697516 | Kalrez 6375 | 169 | 3/32 | .103 +-.003 | 7.487 | 7 1/2 | 7 11/16 |
| 4-1707516 | Kalrez 6375 | 170 | 3/32 | .103 +-.003 | 7.737 | 7 3/4 | 7 15/16 |
| 4-1717516 | Kalrez 6375 | 171 | 3/32 | .103 +-.003 | 7.987 | 8 | 8 3/16 |
| 4-1727516 | Kalrez 6375 | 172 | 3/32 | .103 +-.003 | 8.237 | 8 1/4 | 8 7/16 |
| 4-1737516 | Kalrez 6375 | 173 | 3/32 | .103 +-.003 | 8.487 | 8 1/2 | 8 11/16 |
| 4-1747516 | Kalrez 6375 | 174 | 3/32 | .103 +-.003 | 8.737 | 8 3/4 | 8 15/16 |
| 4-1757516 | Kalrez 6375 | 175 | 3/32 | .103 +-.003 | 8.987 | 9 | 9 3/16 |