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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.

Joint Sealing Systems

Paying attention to the details is the key to successful structural waterproofing and this is particularly true for construction joints.

The Key to Successful Waterproofing

The pattern of any seepage encountered in a reinforced below ground concrete structure is often associated with poor joints or other discontinuities such as service penetrations.

Waterstops provide enhanced resistance to water transmission at construction or day-work joints, services or other penetrations that break the continuity of the waterproofing envelope.

Choosing the right waterstop

All waterproofing projects are unique in their own way, which is why there’s no such thing as a universal solution.

Our range of joint sealing products include several different technologies and are compatible with all of our external surface membranes, ensuring that we can provide the optimal system solution to any challenge.

Down
  • CEMFLEX VB

    Active joint sealing & crack-healing steel plate waterstop

    • Infinitely water reactive concrete sealing and healing of cracks – Protects joints for a lifetime (>80 years’ service life)
    • Up to 80% less labor intensive – compared to traditional waterbars
    • May be installed in any weather – The active mineral coating only reacts with the alkaline water in concrete
    Learn more
  • Quellmax® Plus

    Joint waterstop tape with rain protective coating

    • Self-injecting properties - Sealing and filling even the smallest voids and cracks through a combination of swelling Bentonite and free lime-forming minerals
    • Long term protection - Swelling and sealing is infinitely repeatable
    • Easy handling on site: non-sticky, light-weight, flexible and dimensionally stable even in high temperatures
    Learn more
  • QUELLMAX® BLACKSTOP

    Joint waterstop tape

    • Excellent and immediate swelling of bentonite (>300%)
    • Time saving installation - No sticky protection tape to be removed prior to installation
    Learn more
  • CEMSWELL

    Joint sealing rubber for Prefab elements

    • 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.
    Learn more
  • PVC waterbar
  • Predimax

    Multiple-injection hose system

    • Future proofs joints due to multiple injection capability
    • Unique design prevents unwanted concrete paste to enter system
    • Easy to install
    Learn more
  • CEM11 / CEM19

    Injection hose system

    • Allows injection of resins or cement in case of future water ingress in joints
    • The unique design prevents unwanted concrete paste to enter system
    • Easy to install
    Learn more
Product comparison
CEMFLEX VB Quellmax® Plus QUELLMAX® BLACKSTOP CEMSWELL PVC waterbar Predimax CEM11 / CEM19
Waterproof grade* ≤3 ≤3 ≤3 ≤3 ≤3 ≤3 ≤3
Hydrostatic Pressure 8 bar (80m) 7 bar (70m) 7 bar (70m) 2,5 bar (25m) - up to 3 bar / 30 m depth depending on injection material up to 3 bar / 30 m depth depending on injection material
Water Reactive Sealing
(Mineralization)
(Bentonite/Crystallization)
(Bentonite)
(Butyl rubber)
YES* if using PU-Resin (water reactive) YES* if using PU-Resin (water reactive)
Concrete Healing Mineral






Multiple sealing cycle






Salt Water



+ ≤3% salt


Drinking Water Certificate






Waste Water (Certificate)






Diesel/Petrol






Animal Manure / Slurry






All Weather Installation

(Rain protected up to 3 days)




Pipe penetration/pile detailing



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Tie Bolt Hole Sealing




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Environmentally Friendly Certificate






Prefab Concrete Elements






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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.

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