waterproofing worker hands in gloves with brush in bitumen mastic

adhesion adhesive applies apply bedraggled bitum bitumen bituminous black brush build building closeup coat coating concrete construction contact course cover covered covering dampproof dirty foundation glove gloves hand hands hydroisolation hydrophobic hydrophobization impenetrable impermeable industrial industry mastic primer protection protective smeared smeary soiled stained sticky stonework surface viscous wall walls waterproof waterproofing work worker