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Strong, Flexible, and Vapor Resistant

Drago Mastic is designed to be used as a vapor intrusion membrane in conjunction with Drago Wrap Vapor Intrusion Barrier. Drago Mastic can be used for sealing utility, pipe penetrations, and sealing terminating edges to create a quality installation that greatly resists the ingress of moisture and other gases. Drago Mastic is available in 5-gallon pails.

Its many features include:

  • Ideal for sealing multiple pipe penetrations in close proximity and small pipe penetrations
  • Water-based, trowel-grade asphaltic emulsion
  • Solvent resistant
  • Made in the USA


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Drago Mastic is a medium viscosity, water-based, polymer-modified anionic asphalt emulsion. It can be used to seal permanent penetrations of Drago Wrap quickly and easily, especially small pipes and between pipe clusters.

APPLICABLE STANDARDS American Society for Testing & Materials (ASTM):  

  • ASTM D412: Standard Test Method for Vulcanized Rubber and Thermoplastic Elastomers Tension
  • ASTM E154: Standard Test Methods for Water Vapor Retarders used in Contact with Earth under Concrete Slabs, on Walls, or as Ground Cover
  • ASTM E96: Standard Test Methods for Water Vapor Transmission of Materials
  • ASTM D751: Standard Test Methods for Coated Fabrics
  • ATM C836: Standard Specification for High Solids Content, Cold Liquid-Applied Elastomeric Waterproofing Membrane for use with Separate Wearing Course
  • ASTM D471: Standard Test Method for Rubbery Property – Effect of Liquids
  • ASTM D543: Standard Practices for Evaluating the Resistance of Plastics to Chemical Reagents
  • ASTM E1643: Standard Practice for Installation of Water Vapor Retarders used in Contact with Earth or Granular Fill under Concrete Slabs

Physical Properties:

      • Tensile/Elongation, ASTM D412: 32 psi, 3860%
      • Resistance to Decay, ASTM E154: 10% perm loss
      • Permeance, ASTM E96: 0.17 perms
      • Hydrostatic Water Pressure, ASTM D751: 28 psi
      • Adhesion to Concrete & Masonry, ASTM C836: 7 lbf/in2
      • Hardness, ASTM C836: 75
      • Crack Bridging, ASTM C836: No cracking
      • Low Temp Flexibility, ASTM C836: No cracking

Product Benefits:

      • Available nationwide
      • Alternative to boots for pipe penetrations in Drago Wrap
      • Quickly seals around penetrations, especially pipe clusters
      • Easy application from pails by brush, roller, or trowel
Installation and Warranty Information
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As with any protection system, the installation of Drago Wrap is critical to the system’s effectiveness. Drago Wrap and Drago Accessories make it easy to complete a successful installation. Please refer to the complete Drago Wrap Installation Instructions.


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Allows for an efficient and effective seal around pipe penetrations in Drago Wrap Vapor Intrusion Barrier.

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