Water resistant roll material dispenser assembly and kit

An assembly, kit, and method for water-proofing a rolled web material dispenser. The assembly includes a mounting plate that is constructed to engage a back surface of a housing of the web material dispenser and includes a gasket that is disposed between a front surface of the mounting plate and the back surface of the housing to form a watertight seal therebetween. A plurality of ribs extend in a rearward direction towards a mounting surface from a back surface of the mounting plate and define a plurality of channels that guide water sprayed above the dispenser away from a cavity enclosed by the housing. The assembly preferably includes a plug that is preferably tethered to the mounting plate and is constructed to cooperate with a keyhole of the dispenser housing and form a watertight seal therewith.