Coat right over peeling paint with Rust-Oleum Zinsser Peel Stop Triple-Thick Primer. This high-performance, low-VOC, water-based binding primer locks down and hides peeling, weathered surfaces, creating a smooth, white finish for your top coat. Water-base primer-sealer. Interior and exterior. Seals worn surfaces for a smooth finish. May be applied up to 30 mils wet without sagging. Outstanding flexibility. Topcoat with any latex or alkyd paint. Fast drying - recoat in two hours. <100 VOC.