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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.

QUELLMAX® BLACKSTOP

Superior sealing of construction joints subjected to high water pressure and variable water tables.

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

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.

Quellmax® Blackstop Swellable Bentonite Waterstop Tape is particularly suitable for sealing non-movement joints in deep basements/applications (tested up to 7 bar/70 meters), and where you encounter variable water tables.

Application – Where to use Quellmax® Blackstop

Quellmax® Blackstop is designed to prevent water ingress through nonmovement joints in reinforced concrete structures that will be constantly, or temporarily exposed to water. Quellmax® Blackstop is suitable for both vertical and horizontal structural joints.

Predimax® is installed in the construction joints of a concrete structure at the construction stage. This allows the joints to be injected with a resins or cements at a later stage if required.

Main areas of application:

  • Construction joints in wall/floor areas in contact with pressurized and non-pressurized water
  • Wall/wall and floor/floor construction joints, or wall/ceiling areas
  • Especially suitable for sealing geometrically complicated details such as through-wall penetrations and concrete pilings.

Technology – How does Quellmax® Blackstop work?

Quellmax® Blackstop produces a powerful, fast and reliable swelling reaction that will seal any non-movement construction joint. Quellmax® is also recommended for waterproofing of planned discontinuities in the waterproofing envelope, such as pipe penetrations or concrete pilings.

What makes Quellmax® Blackstop Bentonite Waterstop Tapes so effective is the high sodium bentonite content that is embedded in a matrix of macromolecular natural rubber as well as special fillers and crystalline admixtures.

The Sodium bentonite expands upon contact with water to form a seal against the concrete. In addition to the immediate swelling process, Quellmax® also allows for an active long-term sealing by reacting with the alkalinity of the concrete to form Calcium Hydroxide (free lime) which supports the natural self-healing (sintering) process of the concrete. Both swelling and sintering are a natural and infinitely repeatable process

Swelling and shrinkage is infinitely reversible

Quellmax® Blackstop is tested and approved up to 7 bar water pressure and also for use in changing water tables (wet-dry circle test successfully completed).

Installation – Benefits

  • Simple to install using either adhesive or fixing rail/bar
  • Easy handling on site: non-sticky, lightweight, flexible and dimensionally stable even in high temperatures
  • No sticky protection tape to remove prior to use
  • Replacing passive PVC waterstops it eliminates the requirement of special pieces, split-forming and seam welding
  • For specific installation instructions, please refer to Quellmax® product brochure or contact your local Cemproof technical support

APPROVALS / CERTIFICATIONS

  • Building Supervisor’s General Test Certificate
  • HYG Drinking Water Approval
  • Slurry and animal manure resistance
Read More

SPECIFICATIONS

Dimensions
  • 16 x 21mm (Art.no: 11-100)
  • 18 x 24mm (Art.no: 11-200)
  • 20x 25mm (Art.no: 11-250)
  • 10x 20mm (Art.no: 11-502)
Weight
  • 570 g/m (16x21mm)
  • 730 g/m (18x24mm)
  • 830 g/m (20x25mm)
Form of delivery
  • Packed in boxes with 6 x 5 m lengths per box (30m/box); 900m / pallet (Art.no: 11-100, 11-200, 11-250)
  • Packed in boxes with 14 x 5 m lengths per box (70m/box); 2100m / pallet (Art.no: 11-502)
Storage
  • 3 years, when stored off the ground in dry conditions, which are free from frost
Minimum concrete cover
  • ≥ 80mm
Watertightness
  • 7,0 bar (70 m water pressure)
Overlapping
  • N/A
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 A BS8102:2009

DOCUMENTATION

  • Product data sheet
  • Product brochure

REFERENCES

  • Aviva Stadium Dublin / IRL
  • MWankdorf Stadium Bern / CH
  • Bjorvikatunnel Oslo / NO

WHY CHOOSE QUELLMAX® BLACKSTOP?

Superior waterproofing technology

The Sodium bentonite in Quellmax® Blackstop is embedded in a unique matrix of high molecular butyl rubber as well as special fillers and crystalline admixtures resulting in a two-fold protective reaction to water ingress.

Quellmax® Blackstop will seal through swelling but will also heal smaller cracks in the concrete through mineralization (formation of free lime).

Secures structural integrity – For life

Independent tests have proven Quellmax® Blackstop to be effective at up to 7 bar (70m) water pressure and it will effectively seal the joints of your structure for its entire service life.

Less labor-intensive

Simple to install using either adhesive or fixing rail/bar

Easy handling on site: non-sticky, lightweight, flexible and dimensionally stable even in high temperatures

No sticky protection tape to remove prior to use

Main benefits of QUELLMAX® BLACKSTOP

Dual protection through both swelling (>500%) and additional mineralization that heals concrete through formation of free lime.
WATERPROOFING
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 – Minimizing the risk of expensive future remedial work
No sticky protection tape saves installation time and minimizes waste.

Accessories

Fitting rail
Fitting rail
Fitting bar
Fitting bar
Cem805
Cem805

QUELLMAX® BLACKSTOP IS GREAT ON ITS OWN
…BUT EVEN BETTER AS PART OF THE CEMPROOF SYSTEM.

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

  • DUALPROOF® – Radon tight, self-healing waterproof membrane
    • Protection against Ground Water & Ground Contaminants.
    • Resistant to Ground Gases (including Radon)
    • Protects concrete against salt and sulphate.
    • Can be installed in all weather conditions – No project delays.
    • Environmentally friendly alternative to bituminous products.
    • Provides all Grades of Protection according to BS 8102: 2009.
  • 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”
Read more

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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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