Get in touch

Best in class – Quality & Performance

Our products are engineered and manufactured to the highest quality standards (in primarily Germany/Switzerland) and have been successfully used worldwide with zero product failures.

Independently Tested

Our products are independently tested with exceptional results (German Railway, Swedish Vattenfall, Kiwa accredited testing laboratory, SKZ accredited testing laboratory etc)

We’re greener

We’re green building certified (LEED, BREEAM, Nordic Swan Ecolabel) and our carbon neutral production facility is solar-powered and uses recycled rainwater to minimize our impact on the environment.

We lead through innovation

We only do Structural Waterproofing and where others are happy with good enough, we keep innovating to make waterproofing better, more durable, easier to install and more sustainable. In 2019 we were named one of Germanys Top 100 most innovative companies for the third time in four years (*BPA Gmbh).

Certified and accredited

We’re certified by many of the leading international standards including British, German and US/Canada (ICC-ES).

Over 20 years of excellence in waterproofing

We’ve spent the last two decades helping designers, specifiers and contractors select, design and install the optimal waterproofing for their projects.

CEMSWELL

A dimensionally stable joint sealing profile primarily for use in prefabricated elements in basements, tunnels and mine shafts

  • Capable of swelling 4 times its own volume while being dimensionally stable
  • Specially suitable for Prefab concrete elements in the construction of basements, tunnels and mine shafts.

DOCUMENTATION

PRODUCT DESCRIPTION

Construction joints are particularly weak points in a below grade structure and as the nature of pressurized water is to target the path of least resistance, substandard joint sealing could potentially cause extensive damage to your structure.

Cemswell hydrophilic swelling rubber has been developed for the successful sealing of joints up to 5 bar water pressure and is specifically suited for prefabricated elements. Available in various standard sizes but can also be extruded into any user-defined shape and size.

Application – Where to use CEMSWELL

CEMswell is designed- and specifically suitable for sealing of joints in prefabricated elements in the construction of basements, tunnels and mine shafts.

CEMswell is specifically developed to meet the most difficult challenges such as shield-driven tunnels. Shield-driven tunnels are a common feature in the construction of subways, water supply and sewer systems in cities, tunnels, cable laying, etc.

Recent trends in shield-driven tunnels have been towards new
applications, increase and decrease in section size, and also construction at greater depths or under the seabed where measures against highpressure water are of vital importance.

Main areas of application:

  • Vertical and horizontal joints in prefabricated elements
  • Basements, tunnels, mine shafts
  • Saltwater applications such as construction at greater depths or under the seabed
  • The round profile can be used to successfully seal tie-bolt holes

Technology – How does CEMSWELL work?

CEMswell Hydrophilic Swelling Rubber is an expanding joint sealing profile which swells upon contact with water, while remaining dimensionally stable. It is an extruded TPE-based compound made from rubber, hydrophilic resin, polyethylene, silicone and special admixtures.

On contact with water it is capable of swelling up to 4 times its own volume. CEMswell reliably seals on contact with water by a controlled expansion under confinement in the joint.

The sealing effect is attained through the developing swelling pressure even if the surrounding surfaces are rough and the joint gaps to be filled are of an uneven size.

The expansion process is reversible which means that CEMswell can perform multiple swelling cycles.

Please note that CEMswell is primarily designed for the sealing of prefabricated concrete elements.

Installation – Benefits

  • Simple to install with either adhesive or fixing rail/bar
  • For specific installation instructions, please refer to Cemswell product brochure or contact your local Cemproof technical support

APPROVALS / CERTIFICATIONS

  • General Building Code Test Certificate – abP
  • Independently tested up to 5 bar hydrostatic pressure
  • Slurry and animal manure resistance
Read More

PRODUCT DATA

Dimensions
  • 18×7 mm (Art.no: 12-203)
  • 23×15 mm (Art.no: 12-200)
  • Ø23 mm (Art.no: 12-504)
  • Available in various other sizes
Weight
  • 160 g/m (18x7mm)
  • 400 g/m (23x15mm
  • 570 g/m (Ø23 mm)
Form of delivery
  • 18×7 mm: Packed in boxes with 6 x 12 m rolls per box (72m/box); 3600m / pallet (Art.no: 12-203)
  • 23×15 mm: Packed in boxes with 5 x 6 m rolls per box (30m/box); 1500m / pallet (Art.no: 12-200)
  • Ø23 mm: Packed in boxes with 4 x 5 m rolls per box (20m/box); 500m / pallet (Art.no: 12-504)
Storage
  • Shelf life 3 years when stored in dry conditions, protected from direct sunlight, frost and water
Minimum concrete cover
  • 80-100mm
Watertightness
  • 5,0 bar (50 m water pressure)
Overlapping
  • N/A
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
  • -30⁰C to +70⁰C
    • <

DOCUMENTATION

  • Product data sheet
  • Product brochure

REFERENCES

  • Sewage tunnel Zürich / CH
  • Court Izmir / TUR
  • Pipeline ESKİŞEHİR / TUR

WHY CHOOSE CEMSWELL®?

Superior waterproofing technology

On contact with water CEMswell is capable of swelling up to 4 times its own volume and under conditions of confinement will mold itself to the surrounding surfaces producing a water-tight seal.

Secures structural integrity – For life

CEMswell is specifically developed to meet the most difficult challenges such as sealing prefabricated elements for shield-driven tunnel construction, as well as construction at greater depths or under the seabed where measures against high-pressure water are of vital importance.

CEMswell is capable of performing multiple swelling cycles

Less labor-intensive

Simple to install with either adhesive or fixing rail/bar

Main benefits of CEMSWELL

Optimal for prefabricated elements that will be subjected to high water pressure (tested up to 5 bar/50m)
Capable of performing multiple swelling cycles
The round profile is also suitable for sealing tie-bolt holes
Approved for use in wastewater applications as well as slurry / animal manure, and saltwater applications

Accessories

Fitting rail
Fitting rail
Fitting bar
Fitting bar
Cem805
Cem805

CEMSWELL IS GREAT ON ITS OWN
…BUT EVEN BETTER AS PART OF THE CEMPROOF PREFAB SYSTEM.

Complete your design with the following products to achieve a fail-safe combination waterproofing system for prefab:

  • SILVERSEAL® – Swelling, self-healing waterproof membrane
    • Protection against pressurized ground water.
    • Approved for use in saltwater conditions
    • Can be installed in all weather conditions – No project delays
    • Quick and easy to install due to low weight
    • Provides all Grades of Protection according to BS 8102: 2009
  • QUELLMAX® PLUS – Swellable joint waterstop tape with rain protection
    • Dual protection through both swelling (>500%) and additional mineralization that heals concrete through formation of free lime.
    • Optimal for structures that will be subjected to high water pressure (tested up to 7 bar/70m) and variable water tables.
    • The infinitely reversible swelling/shrinkage secures the integrity of your structure throughout it’s expected service life.
    • The protective coating of Quellmax® Plus protects against premature swelling due to rain or general site water
    • Quellmax® is installed on the “Waterside” and CEM11/19 on the “dry side”
Read more

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.

Let’s talk
+