Everbuild universal 501 pva bond everbuild pva5l pva bond is a multi purpose bonding agent primer sealer cement and plaster admixture that adheres to most common building and diy materials ideal for priming unsound surfaces prior to plastering or painting as an adhesive on wood cork textiles and most applications where at least one surface is porous for general dust sealing on flaking paintworkwalls etc and as a cement and plaster admixture fully conforms to bs 5270 everbuild pva5l