Active polymer waterproofing membrane with XP technology.

Featuring XP technology, the latest innovation in active waterproofing. This advanced polymer technology provides exceptional performance in a wide range of ground contaminates—including high-saline conditions. Unlike passive membranes when used alone, the self-sealing ability of the active XP technology enables the ULTRASEAL XP waterproofing membrane to seal minor cuts or damage to the membrane. Most importantly, it has been proven effective in both hydrostatic and non-hydrostatic conditions.

ULTRASEAL XP can be installed directly to green concrete and in extreme temperatures, thus providing greater flexibility to the construction schedule. The durable membrane can also withstand pedestrian construction traffic and inclement weather.

Exceptional Waterproofing Performance:

Protection from water ingress:

  • The active XP technology enables the ULTRASEAL XP waterproofing membrane to self-seal minor cuts or damage to the membrane.
  • Provides a strong mechanical bond to poured concrete.
  • Self-sealing membrane laps.
  • Proven effective in structures under continuous or intermittent hydrostatic pressure—up to 70m (231 ft).

Protection from Contaminants:

  • XP technology resists a wide-range of contaminants, including high-saline conditions and dilute organic solvents.

Installation Benefits and Features:

Fast and Easy:

  • Lightweight rolls.
  • Overlapped seams and mechanical fasteners eliminates installation variables in the field.


  • Can be installed in virtually any weather condition.
  • Can be installed on green concrete.
  • Proven effective in both vertical and horizontal applications—i.e., backfilled and property-line walls.


Used with COREFLEX XP, CORETEX XP is a polymer impregnated geotextile featuring XP technology for transition details, corners, butt-joints and protection from rough edges and surfaces.


A trowel-grade mastic designed for a variety of surface preparation and detailing work with CETCO active waterproofing membranes. Featuring XP Technology hydrophilic polymer, SEAL-X XP swells upon contact with water to form a watertight barrier in fresh to high-saline water conditions. With the consistency of thick grease, SEAL-X XP is easy to apply and bonds to most building materials. Available in 25kg (5 gallon) pails.


Featuring XP technology, the latest innovation in active waterproofing, ULTRASEAL XP provides exceptional performance in a wide range of ground contaminates. Proven effective in both hydrostatic and non-hydrostatic conditions, the self-sealing ability of ULTRASEAL XP seals minor cuts or damage to the membrane.


The next generation of waterstop that expands upon contact with water to form a positive seal to stop water ingress through cast-in-place concrete construction joints and around pipe penetrations. Through the use of the patented XP technology, WATERSTOP® XP is proven effective in a wide range of contaminated environments.

Architectural Specifications

LEED Letter

Product Manuals

Product Sheets

Technical Data Sheets

Helios Energy Research Facility

Berkeley, CA, USA

From design development to construction, CETCO’s expertise in waterproofing was called upon to ensure that the basement, housing expensive laboratory equipment, remains dry at all times. CoreFlex’s composite system also saved the added labor of a two-membrane installation process.

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Mercy Hospital Plaza

St. Louis, MO, USA

To minimize building exposure, poor air quality, and odors, this occupied hospital utilized COREFLEX to waterproof the plaza deck prior to installing a GreenScapes vegetated roof system, hard-scape and water features.

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Ronald McDonald House

Chicago, IL, USA

CETCO provided the complete watertight green roof assembly for the nation’s largest Ronald McDonald House. Protected by CETCO’s COREFLEX® waterproofing membrane, three GreenScapes assemblies—intensive, extensive, and vegetated trays—were utilized to meet a challenging landscape design.

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Rush University Hospital Atrium

Chicago, IL, USA

Rush University is one of the top-ranked nursing colleges in the US. Its hospital is comprised of 676 beds and boasts national rankings in 10 of 16 specialty areas in U.S. New & World Report’s 2011 “America’s Best Hospitals” issue.

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Shady Hills Gymnasium and Parking Garage

Cambridge, MA, USA

The original spec called for ULTRASEAL below slab with a layer of VOLTEX DS installed over it to provide protection from subsequent concrete operations. However, once the dewatering of the site began, it became apparent that there would be significantly more water at a greater flow rate.

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Wake Forest University Hosp. Plaza Deck Restoration

Winston-Salem, NC, USA

Restoration of the plaza deck was required for watertightness of the hospital space below and reopening of the emergency room entrance. COREFLEX was quickly installed over the leaking hot-applied rubber membrane to complete the project on time with minimal building exposure.

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