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PROSOCO R-Guard Cat 5 Air & Waterproof Barrier - 5 Gallon Pail
PROSOCO R-Guard Cat 5 Air & Waterproof Barrier - 5 Gallon Pail Add to Quote autorenew

PROSOCO R-Guard Cat 5 Air & Waterproof Barrier - 5 Gallon Pail


Cat 5 is a primary air barrier designed for use over above-grade structural surfaces prepared with Joint & Seam Filler and FastFlash. Cat 5 produces a highly durable, seamless, elastomeric weatherproofing membrane on exterior sheathing, CMU backup walls, and precast concrete. Proven to prevent water and air penetration of the building envelope in conditions ranging from everyday to the 155-mph winds of a Category 5 hurricane.

Cat 5™ can be applied in unfavorable weather conditions to dry or damp substrates. This feature eliminates many weather-related construction delays and accelerates the “drying in” of new buildings. The durable, elastomeric membrane adheres to most surfaces, is immediately waterproof and is compatible with most sealants and waterproofing or air barrier components.

  • Silane functional polymer provides superior long term adhesion, crack bridging and weathering characteristics. Self seals fastener penetrations.
  • Bonds to most common building materials without priming to produce a durable, weatherproof membrane. Easy to repair if damaged.
  • Will not tear or lose effectiveness when exposed to weather during construction.
  • Bonds and cures in wet weather and on damp substrates.
  • May be fully exposed to UV and weather for up to 12 months. If longer, contact for inspection. 
  • Single component – saves time. 
  • Easy roller application in all climates.
  • Breathable. Allows damp surfaces to dry.
  • Compatible with most sealants and waterproofing or air barrier components. 
  • Solvent free. Isocyanate free. Phthalate free.
  • No shrinkage. No staining. No yellowing.
  • Will not support mold growth.
  • Stops penetration of air and water under normal and extreme weather conditions. 
  • Air Barrier Association of America (ABAA) approved product

5 gallon pail

Code: 70430

For California Residents:

WARNING:Cancer and Reproductive Harm -

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