Iminyango yegumbi elibandayo le-OMT ihlanganisa isicabha esinezinsika, isicabha sokushwiba kanye nesicabha esishelelayo. Zisetshenziswa kabanzi njengegumbi elibandayo, igumbi lesiqandisi, isiqandisi sokuqhuma nezinye izakhiwo. Izinto eziyinhloko yi-polyurethane. Yonke iminyango inokubekwa uphawu okuhle nokusebenza kwe-insulation.