Zinsser Peel Stop 1LtrPeel Stop is a clear, flexible bridging sealer for surfaces where peeling, flaking, dusting or chalking is a problem. Use indoors or out to form a breathable membrane over questionable or faulty substrates. Peel Stop tightly bonds to old paint and problem areas forming a sound surface for new paint. Peel Stop forms a tough acrylic film that stays flexible and helps prevent peeling by letting moisture escape. A clear sealer, Peel Stop works like