O-anulus sigillum adhibetur in instrumentis machinis, navibus, autocinetis, instrumentis aerospace, machinis metallicis, machinis chemicis, machinis machinariis, machinis constructis, machinis fodiendis, machinis petroleum, machinis plasticis, machinis agriculturae, instrumentis et metris variis, numerus applicationum variarum specierum signandi componentium. Sigilla o-anuli in oleo, acido et alcali, stridore, exesa chemica et aliis ambitibus adhuc bene ludunt obsignatione, concussione effusio.

Suadeo: compositum EPDM, CR compositum, compositum FKM, compositum HNBR.
EPDM: S552;S552-1;S512F;TER 4049;TER 4047;TER 4039;TER 4038EP;J-3092E;J-3080;J-3080P
CR:SN232;CR111;CR112;CR211;CR212;CR213;