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Self-Adhering, Blindside Waterproofing Membrane

4' x 50' Roll

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Availability: In stock



MiraPLY-H with SeamLOCK Technology is a nominal, 70-mil horizontal grade, self-adhering, blindside waterproofing membrane.


The dual laminate membrane fuses a 45-mil thick, reinforced TPO sheet to a 25-mil butyl adhesive coating, combining two of the most time-tested waterproofing technologies used worldwide. With the addition of new SeamLOCK pre-primed strips, MiraPLY-H is not only tough, durable and flexible, it is easy to install.

Typical Uses
  • Below elevator pits
  • Under slabs and footings
  • Below-grade structural slabs
Features and Benefits
  • Tough - Pliable TPO layer is three times more puncture resistant than HDPE, making MiraPLY the ideal system for heavily trafficked construction sites and uneven substrates.
  • Durable - Butyl Alloy adhesive bonds to placed structural concreteeliminating water migration between membrane and concrete, whileensuring protection against ground settlement beneath slabs.
  • Installer Friendly - Light-weight membrane makes kick-out installation a snap. Factory installed SeamLock pre-primed, peel-and go-seam strips eliminates primer for enhanced adhesion and easier side lap construction.
Even more benefits!
  • Fully bonds to concrete
  • Tremendous impermeability
  • Excellent resistance to most chemicals (i.e., acids and bases)
  • Effective Radon barrier
  • Bridges cracks in concrete


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