A PVA Primer will not hide stains

It is both a durable and long-lasting enamel that is corrosion resistant

This product is especially suited for use in wet or damp areas

helping to ensure a long and durable product life

To remove stains

<R> 4"x8'SEMI-RIGID DUCT-ALUM ALUMINUM W/WORM GEAR CLAMPS DEGREASERS-ALL PURPOSE A PVA Primer will not4 x 8 Flexible Semi Rigid Aluminum Duct Kit Item #3120L Semi rigid aluminum duct is ideal for applications where building codes require use of all aluminum duct. The duct is totally non combustible with a maximum operating temperature of 400F. Continuous airtight lock seam Non combustible Class 0