Mud bentonite waa dhoobo dhoobo leh oo leh montmorillonite oo ah qaybta ugu muhiimsan, inta badan waxaa loo isticmaalaa sida qodista alaabta qashinka ee injineernimada aasaasiga ah, oo loo isticmaalo samaynta dhoobada qodista, inta badan isticmaalka qaabka bentonite dhoobada waa bentonite-ku salaysan sodium.