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UNDERSEAL® WATERPROOFING
U.S. Patent No. 7,188,523 and 7,686,903
Polyguard's Underseal Waterproofing Systems provide a level of protection never before achieved against underground moisture and contaminants

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Concrete slabs and foundation walls almost inevitably crack,
providing entry to water, contaminates, and insects.
Underseal® not only seals out these harmful substances, but has been proven through over 30 years of use in highway pavements, to maintain the seal, even if the pavement above it cracks.


Click here to view "Why Most Underslab Vapor Barriers Fail" PowerPoint® presentation
Click here to view the Revised "UNDERSEAL" PowerPoint® presentation R.1-20-06
Click here to view complete listing of underseal research and documentation

UNDERSEAL® Underslab Waterproofing Membrane

Click here to view Underslab Photos

Image - XT 850 detail

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Installed prior to slab pour, Underslab Waterproofing Membrane contains 3 layers of protection.

  1. The bottom layer is highly puncture resistant and stretchable.
  2. The middle layer is a thick polymerized asphalt sealant, which acts as a seal and an elastomeric stress absorbing formulation. This is the primary material which guarantees a permanent seal when the concrete cracks or the joint moves above the membrane.
  3. The top layer is a high strength geotextile which forms a physical bond to the concrete slab poured on top of it.
Image - XT 850 Application
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Data Sheet PDF icon PDF
MSDS
Guide Specs
Details

UNDERSEAL® Blindside Waterproofing Membrane
Click here to view Blindside Photos
Image - XT 751 detail
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Blindside Waterproofing Membrane is a three layer system, usually installed against vertical drainage boards which are fastened to lagging. PolyFlow 15P & Low Flow drainage boards.

  1. A very high strength and puncture resistant, but conformable, polyethylene film layer is installed against the drainage board.
  2. A thick layer of elastomeric, stress absorbing polymerized sealant is adhered to the high strength polyethylene.
  3. A high strength geotextile is the last layer. This geotextile forms a physical bond to the concrete foundation wall poured against it.
Image - XT 751 Application
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Data Sheet PDF icon PDF
MSDS
Guide Specs
Details

UNDERSEAL® PRM / Split Slab Waterproofing Membrane
Click here to view PRM / Split Slab Photos

Image - XT 851 detail


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Installed between two slabs, PRM / Split Slab Waterproofing Membrane adheres directly to the base slab.

  1. The bottom layer is a polymerized asphalt sealant, which acts as a seal and an elastomeric stress absorbing formulation. This is the primary material which guarantees a permanent seal when the concrete cracks or the joint moves above the membrane.
  2. The top layer is strong and highly puncture resistant and stretchable.

PRM / Split Slab Waterproofing Membrane does not require a protection board if light construction traffic is present. Many times it is used in conjunction with Polyguard horizontal drainage boards. PolyFlow 18 drainage board.

Image - XT 851 Application
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Data Sheet PDF icon PDF
MSDS
Guide Specs
Details

UNDERSEAL® PRM / Protected Wall Waterproofing Membrane
Click here to view PRM / Protected Wall Photos
Image - XT 750 detail
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Installed on vertical foundation walls, PRM / Protected Wall Waterproofing Membrane is a self adhesive material, similar to Polyguard's widely specified 650 product, except that it contains a strong geomembrane backing which provides a built-in protection board.

 

Image - XT 750 Application
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Data Sheet PDF icon PDF
MSDS
Guide Specs
Details

Used with
UNDERSEAL®
Accessories used with UNDERSEAL® Membranes
Under
Slab
Split Slab
Foundation Wall
Blind Side
Name of Accessory
Links
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Detail Sealant PW Data Sheet
MSDS
 
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California Sealant Data Sheet
MSDS
 
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650 LT Liquid Adhesive Data Sheet MSDS  
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Shur-Tac Waterbase Liquid Adhesive Data Sheet MSDS  
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650 Mastic Data Sheet MSDS  
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Termination Bar Data Sheet MSDS  
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UNDERSEAL Seal Tape Data Sheet MSDS  
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UNDERSEAL Fabric Tape Data Sheet MSDS  
Drainage Board - for Vertical Application
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PolyFlow® 15P Vertical Drainage Board

Data Sheet MSDS Details
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PolyFlow® Low Flow Protection / Drainage Mat

Data Sheet MSDS Details
Drainage Board - for Horizontal Application
X
X

PolyFlow® 18 Horizontal Drainage Board

Data Sheet MSDS Details
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Estimating Guide Sheet PDF icon PDF:40KB-1pg.
   

How UNDERSEAL® acts as a barrier to:

 
 
How UNDERSEAL is superior to today's "vapor barriers"
Why UNDERSEAL can take unprecedented construction abuse
How UNDERSEAL will self-heal small punctures against moisture vapor.
Why UNDERSEAL will continue to seal, even when the slab above it cracks, or the joint in the slab above it moves 
Why UNDERSEAL may reduce the amount and severity of cracking in the slab poured above
How DOT's use Polyguard underseals to create a permanent seal, and to reduce the amount of cracking

 

Complete listing of underseal research & documentation


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