Blue is Best - When it comes to air, water and mold defense — Don’t Compromise! Choose BEP Blue Barrier for maximum protection and peace of mind.

BEP Blue Barrier

Best for the environment...
...Best for the contractor!

  • Spread, Brush, Gun, Roll or Spray Applied
  • Single Stage Products
  • No Primers Required
  • No Mixing Necessary
  • Paintable
  • Wet or Dry Surface Application
  • Superior Adhesion
  • Wide Range of Substrate Compatibility
  • Limited 10-Year Warranty


The landscape for building air and moisture protection is changing at an explosive rate. New local building codes and air and moisture building construction mandates, as well as the rise in remedial repair and litigation costs associated with building water and mold damage, have created a greater contractor awareness for effective building envelope protection. The ease of application, cost of installation and long-term energy efficiency of today’s air and moisture barrier technologies are as important as the materials themselves.

BEP Blue Barrier provides contractors with a fully compatible, complete family of liquid applied air and moisture barrier products formulated from a proprietary Modified Silyl-Terminated Polyether (STPE) technology. STPE combines the major benefits of silicone and polyurethanes in a single product.

Improved Productivity - Lower Application Costs

Developed with direct contractor involvement, BEP Blue Barrier Liquid Wrap is the industry’s first STPE technology product that can be applied with low cost airless spray equipment. Not only does this greatly improve the productivity of air and moisture barrier installations, it also provides building contractors and building owners all the long-term benefits of a high solids based seamless air and moisture barrier membrane without the cost of expensive air driven sprayer equipment.

Technical Information

A Complete Air & Moisture Barrier System

The BEP Blue Barrier family of products is designed to work together as a complete air and moisture protection system. Whether used individually or as a total building envelope protection solution, all Blue Barrier products are developed and manufactured by BEP using the same STPE technology so that contractors and applicators can be confident that Blue Barrier Liquid Flashing 2100, Blue Barrier Joint Filler 2200, Blue Barrier Liquid Wrap 2300 and Blue Barrier Flash 'N Wrap 2400 are fully compatible. Take the risk and guess work out of multi-vendor, multi-technology applications ---For trouble free air and moisture protection--- Blue is Best !