3M Mastic tef 2166 ƙwararren siminti ne mai hana ruwa ruwa, yana da dacewa mai kyau da gyaran hatimi, yana iya dacewa da samfuran da ke da alaƙa iri-iri.Siffofin taushi, masu siffa masu kyau suma sun dace da cika filaye marasa tsari, yayin da aka gwada juriyarsa kuma har yanzu yana aiki a rage digiri 18.Babban halayensa shine kyakkyawan aikin rufewar ruwa mai hana ruwa, ana iya amfani da shi ga kowane nau'in lantarki, kayan aikin sadarwa mara ruwa da kuma tabbatar da danshi, amma kuma ana iya amfani da shi ga madaidaicin rufin waya clip mai hana ruwa da danshi, bugu da ƙari, aikace-aikacen Kebul na submarine kuma muhimmin sashi ne na 2166 na iya zama mai dacewa.Kebul na jirgin ruwa mai nannade biyu da aka hade tare da J20 na iya jure matsananciyar matsa lamba na ruwa da rufi, daidai da iyakokin Directive (EU) 2015/863, kamar yadda aka gyara a Annex II na EU RoHS Directive 2011/65/EU.