Ultra-Lightweight, double sealing & self-healing waterproofing system

  • Extremely easy to handle on-site due to its ultra-light weight design (approx. 450g/m2)
  • Dual protection against pressurized water – A passive, high density PE barrier and a polymer impregnated fleece offering extreme water absorption, and self-healing/sealing action.
  • Very quick and simple installation
  • May be used in Saltwater conditions



As a first line of defense, a great waterproof membrane will stop any water coming into contact with your below ground structure. This is important because concrete will invariably crack, be it from settlement, unequal static forces or during curing. Needless to say, subsequent water ingress can cause extensive harm to your structure and internal environments.

The super-absorbing and self-healing properties of Silverseal® make it suitable for most structural waterproofing applications including tunnel sealing.

The ultra-low weight makes this membrane extremely easy to handle on site and also very efficient as a waterproofing component in the production of prefabricated concrete elements.

Application – Where to use Silverseal®

Silverseal® is designed for the sealing and protection of below ground reinforced concrete structures and replaces all kinds of conventional waterproofing materials such as bituminous liners, coatings and synthetic membranes.

Main areas of application:

  • Structural waterproofing of floor slabs and exterior concrete walls
  • Below ground reinforced concrete structures like foundations and tunnels
  • Pressurized and non-pressurized water
  • In prefab applications
  • Approved for use in saltwater conditions

Technology – How does Silverseal® work?

The unique sealing properties of Silverseal® are attained through two functions;

  1. The first sealing function lies in the high-density PE-membrane
  1. The second sealing function is only activated if the membrane is damaged and the incoming water activates the swelling non-woven geotextile.

If water penetrates the membrane, the water reactive polymer swells thus creating an extremely tight, gel-like film which permanently seals the concrete structure.

Installation – Benefits

  • Quick and easy to install
    • Lightweight so easy to handle on site
    • Overlaps are easily secured with adhesive (Cem805)
    • No need for complicated welding equipment
  • Weatherproof – can be installed in any season
  • Tough and resistant
  • For installation instructions, please refer to Silverseal® product brochure or contact your local Cemproof technical support


  • CE Marking DIN EN 13967
  • General German Test Report


  • 2 x 50 m
  • 450 g/m2
Form of delivery
  • 2 x 50 m: 100 m² per roll / 5 rolls per pallet ( 21-120)
  • Shelf life 5 years when stored clean, dry and shaded from sunshine.
Minimum concrete cover
  • N/A
  • Minimum 50mm, and the ends of the rolls staggered by a minimum of 300mm
Approved for water exchange areas
  • Non-hazardous, non-poisonous category material, drinking water safe
Lifetime expectancy
  • Life of the structure
Grade of waterproofing protection
  • Grade 1, Grade 2, Grade 3 as British Standard 8102:2009
Type of waterproofing system
  • Type B BS8102:2009
Service temperature
  • T-30 C – 70 C


  • Product data sheet
  • Product brochure


  • Aviva Stadium Dublin / Ireland
  • Bjorvika tunnel Oslo / Norway/li>
  • Train Station S21 Stuttgart / Germany


Superior waterproofing technology

Silverseal® offers the unique combination of top-of-the-line self-healing waterproofing performance, and superior efficiencies in installation.

Secures structural integrity – For life

The high-density PE-membrane provides a physical barrier, and the second layer, a fleece impregnated with a super-absorber and water activated swelling polymers will seal small cracks in the concrete.

Less labor-intensive

At only 450g/m2, Silverseal® is extremely quick to install, and easy to handle on-site or in a Prefab production line.

Main benefits of SILVERSEAL®

Protects against pressurized- and saline groundwater
Seals small cracks in the concrete by the pressure of the swelling polymers
Easy handling and time saving fitting
Can be either pre or post-applied The low weight and simplicity in use make Silverseal® particularly suitable as a waterproofing component in the production of Prefab concrete elements.



Complete your design with one or several of the following products to achieve a fail-safe combination waterproofing system:

  • CEMFLEX® VB – Active crack-healing waterstop for construction joints
    • Protects construction joints through active and infinite sealing, and natural healing of cracks in concrete
    • Tested to 8 bar (80 m) water pressure
    • Extremely quick, and simple to install – Up to 80% less labor intensive
    • Drinking Water Approval
    • Oil-, gasoline- and fuel-resistance tested
    • Fully weatherproof / installable in all weather conditions – No project delays
  • PREDIMAX® – Multiple Injection System for construction joint sealing
    • “Future-proof” your structure with this built-in multiple injection system, allowing for initial, scheduled, or remedial sealing of Joints
    • Easy to install
    • A unique patented design prevents unwanted fresh concrete paste to enter the system.
    • Predimax® is installed on the “dry side” and Quellmax on the “waterside”

We’re here for you!

Talk to an expert today - Design & application guidance

We’d love to support you along your waterproofing design and application journey. Feel safer knowing our extensive technical knowledge and experience is there to ensure you make the right choices.