Flash Harry Fix-A-Leak Acrylic Waterproofing Kit Membrane Included Various Colors Uses : For waterproofing all iron, tiled, pitched roof applications, parapets, skylights, roof ridges, flashings and roof screws. Applications : Tiled, slate, iron and timber doors. For Waterproofing around chimneys and skylights. Flashings, lap joints, roof screw holes. Parapet walls,