Complete structural waterproofing materials. Products BEP Blue Barrier is a family of products designed to protect ALL structural locations that are vulnerable to unwanted air, moisture, and mold intrusion, including windows and doors, as well as structural penetration areas like transitions, joints, seams, and claddings. Blue Barrier is formulated on proprietary modified STPE technology. The products cure and bond on wet substrates, as well as on vertical waterproofing applications. Blue Barrier’s efficient and superior single-stage application provides the most effective air, water, and mold defense on the market. Substantial benefits of Blue Barrier Single Stage Application Dry or Wet Installation No primers / No Mixing Eco-friendly, Proprietary Formula Spread, Brush, Gun, Roll or Spray Fully Compatible System