Novia's double-sided butyl tape is a 22.5m roll of polyisobutylene-based sealing tape designed for use with Novia products. This Novia butyl tape will prevent water and air ingressing into the construction so this tape is primarily used in conjunction with vapour control layers and damp-proof membranes. Novia double-sided butyl tape is non-toxic and doesn't need any special tools to fit. Novia Double-Sided Butyl Tape Specification Roll Length: 22.5mRoll Width: 15mmRoll Thickness: 2mm