Kalmar "marine glue" yawanci tana nufin wani nau'in manne da aka ƙera don a yi amfani da shi a cikin ruwa, kamar ginin jirgi, gyaran jirgin ruwa, ko wasu aikace-aikace inda manne zai kasance a cikin ruwa ko danshi. An tsara manne ruwa yawanci don zama mai hana ruwa da juriya ga ruwan gishiri, kuma ana iya yin shi daga abubuwa iri-iri kamar epoxy, polyurethane, ko cyanoacrylate. Kalmar na iya nufin musamman ga alama ko nau'in mannen ruwa.