Bathtub fastener assembly designed to couple a first component having an aperture therethrough to a second component having a rib extending therefrom, the bathtub fastener assembly comprising: a bathtub component including a structural plastic part and a plurality of separate flexible seal parts (36a, 36b, 36c); the structural plastic part including a head and a tub body extending from the head, the tub body having two tub side walls connected at a tub insertion end with an interior clip receiving cavity between the two opposing side walls, each of the two tub side walls having an aperture retention tab extending exteriorly therefrom and designed to retain the bathtub component in the aperture of the first component when inserted therein, the structural plastic part including openings on lateral sides of the aperture retention tabs designed to allow the aperture retention tabs to flex inwardly during insertion of the bathtub component into the aperture of the first component; and a U-base clip component including two clip side walls connected at a clip insertion end with a rib receiving cavity between the two clip side walls, and a rib retention protrusion extending interiorly from the two clip side walls into the rib receiving cavity and designed to retain the rib in the rib receiving cavity of the U-base clip when inserted therein, and the U-base clip component being received in the interior clip receiving cavity and being coupled to the bathtub component, characterized in that each of the separate flexible seal parts (36a, 36b, 36c) are integrated together with the structural plastic part and in that the plurality of separate flexible seal parts (36a, 36b, 36c) includes a separate flexible seal part forming an umbrella seal extending from the head and a pair of separate flexible seal parts (36b, 36c) sealing the openings, respectively, on the lateral sides of the aperture retention tabs. a bathtub component including a structural plastic part and a plurality of separate flexible seal parts (36a, 36b, 36c); the structural plastic part including a head and a tub body extending from the head, the tub body having two tub side walls connected at a tub insertion end with an interior clip receiving cavity between the two opposing side walls, each of the two tub side walls having an aperture retention tab extending exteriorly therefrom and designed to retain the bathtub component in the aperture of the first component when inserted therein, the structural plastic part including openings on lateral sides of the aperture retention tabs designed to allow the aperture retention tabs to flex inwardly during insertion of the bathtub component into the aperture of the first component; and a U-base clip component including two clip side walls connected at a clip insertion end with a rib receiving cavity between the two clip side walls, and a rib retention protrusion extending interiorly from the two clip side walls into the rib receiving cavity and designed to retain the rib in the rib receiving cavity of the U-base clip when inserted therein, and the U-base clip component being received in the interior clip receiving cavity and being coupled to the bathtub component,