Comparable Grades
RC grades below are presented as comparable grades for evaluation in the referenced applications—not as identical or guaranteed drop-in replacements.
| Brand | International grade | RC candidate | Evidence |
|---|
| Kaneka | M-721 | RC-721 | STRONG |
| Kumho | HR-181 | RC-178H | DIRECT COMPARATIVE TEST |
| Kumho | HR-192 | RC-198 | DIRECT COMPARATIVE TEST |
| Kumho | HR-150F | RC-158 | DIRECT COMPARATIVE TEST |
| Kaneka | M-190 | RC-3690 | DIRECT COMPARATIVE TEST |
| Mitsubishi Chemical / METABLEN™ S Series | SRK-200A | RC-200A | DIRECT COMPARATIVE TEST |
Verified comparison references
| Reference brand | Reference grade | RC candidate | Evidence |
|---|
| Kaneka | M-721 | RC-721 | STRONG |
| Kumho | HR-181 | RC-178H | DIRECT COMPARATIVE TEST |
| Kumho | HR-192 | RC-198 | DIRECT COMPARATIVE TEST |
| Kumho | HR-150F | RC-158 | DIRECT COMPARATIVE TEST |
| Kaneka | M-190 | RC-3690 | DIRECT COMPARATIVE TEST |
| Mitsubishi Chemical / METABLEN™ S Series | SRK-200A | RC-200A | DIRECT COMPARATIVE TEST |