Pair your AlphaThane adhesive or sealant with a great primer. The Alpha Systems AlphaThane Primer from Lippert is great for your roof repair needs. This primer promotes adhesion for any AlphaThane adhesive or sealant being applied to polypropylene plastic and polypropylene/elastomeric blends like SuperFlex. Application is straightforward and can be done in a variety of ways â by wiping, spraying, or brushing. Whatever method you choose, make sure all surfaces are free of dirt, oils, and other contaminants before beginning.• Alpha Systems 4110 helps create adhesion for AlphaThane adhesives and sealants being bonded to polypropylene plastic and polypropylene/elastomeric blends like SuperFlex.• This primer can easily be wiped, sprayed, or brushed on for application. The only requirement is a well-ventilated area.• Coverage: 220 sq. ft. per gallon Promotes adhesion to polypropylene plastic & polypropylene/elastomeric blends Application can be done by wiping, spraying, or brushing Covers 220 sq. ft. per gallon | Alpha Systems TPO Primer, 1 Gallon