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Blindside Membrane

Underseal Blindside Membrane Installation Video
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Underseal® Blindside™ Membrane - Missing - MISSING

Blindside Membrane is a tough, 73-mil pre-concrete pour waterproofing membrane/vapor barrier designed to virtually eliminate water and vapor transmiss...

Overview

Blindside Membrane is a tough, 73-mil pre-concrete pour waterproofing membrane/vapor barrier designed to virtually eliminate water and vapor transmission through below grade concrete walls.

Blindside Membrane is used as a waterproofing membrane where vertical, positive-side waterproofing is required to be installed before the foundation walls are poured. A strong mechanical bond is developed between the membrane and concrete at the time of pouring as the concrete intermingles with the fibers of the nonwoven geotextile. A strong adhesive bond is created when the static load and thermal reactive heat of the concrete slab causes sealant/adhesive compound to have an intimate contact with the concrete surface preventing water migration. With both a mechanical and adhesive bond, the concrete will be tightly sealed and bonded to the membrane, creating superior protection against moisture intrusion. 73-mil Blindside can also be used in certain horizontal applications. Contact Polyguard for more information.

Blindside Membrane - Data Sheet
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Blindside Membrane - Guide Spec
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Blindside Membrane - Product Overview Sheet
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Blindside Membrane - Materials Checklist
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Blindside Membrane - HPD
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Blindside Membrane - SDS
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Features & Benefits

Lasting Durability: Tough 3-layer composite membrane - Technology that has stood the test of time.
Outstanding Puncture Resistance: 2 times higher than the new AC 527 building code requirement - Better protection against backfill damage.
Strong Mechanical Bond: Our inner fiberous layer embeds itself into the cured concrete creating a very strong mechanical bond - ensures our waterproofing system will stay in place as the building and outside soil move during the building's lifetime.
Resistant to Water Migration: An adhesive bond is created when heat from the concrete wall while curing , causes our compound to melt onto the concrete's positive side surface creating a continuous sealed structure.
Horizontal Installation: Blindside Membrane may also be installed horizontally over prepared sub-base such as mudslab, carton forms, fine crushed beds/pea gravel or Polyguard approved drainboard.
Superior Joints: Strong laps seams create a long lasting, water tight system - Outperforms the new AC 527 standard (ASTM 1876) by more than 40%.
Crack Protection: Blindside is thicker than most non asphalt based competitive products which gives it the stress-absorbing and elongation properties to maintain a watertight seal.

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