MASTERSTOP bentonite waterstops

Find out everything about Europe's most rigorously tested waterstop.

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With MASTERSTOP we have developed a bentonite swelling tape that sets new standards in terms of safety and performance. No other bentonite waterstop has been tested as rigorously as our MASTERSTOP, which has proven its functionality even at 8 bar water pressure. In addition – and this is another unique feature of MASTERSTOP – it has a General Building Supervisory Test Certificate (abP) for smooth and rough construction joints.

This exceptional performance allows us to clearly position our product: MASTERSTOP is the safest bentonite waterstop in Europe!

MASTERSTOP is available in various designs, which we will present to you in more detail on this page – from MASTERSTOP 25 x 20 mm for the most demanding requirements to the self-adhesive MASTERSTOP SK, which can be used, for example, to seal the outside of wall sleeves.

Tested up to 8 bar water pressure

Europe's safest bentonite waterstop

Comply with guidelines securely: :

European Technical Assessment ETA
General Building Supervisory Test Certificate (abP) for smooth and rough construction joints
Standard test 50 m water column with swelling tape adhesive
High pressure testing for smooth and rough construction joints with water column up to 80 m. In this case, POWER swelling tape adhesive or MasterMastic PU swelling paste must be used for fastening.
Complies with the directive for water-impermeable structures. Wear classes 1 + 2: continuously or periodically pressurised water or soil moisture and utility class A + B
Very high resistances (see table below)

Additional benefits: :

Produced with high-grade sodium bentonitet
Easy and safe installation
No foundation curb
Self-injecting effect: the swelling tape components penetrate cracks and cavities
Environmentally friendly
No fittings or welding
Swelling and shrinking process is reversible
Dimensionally stable and not sticky
No cuttings or oddments

Resistances

Medium	resistant ✔	not resistant ✘
Alkalis in general	✔
Urea	✔
Liquid manure/slurry	✔
Biogas	✔
Radon	✔
De-icing salt	✔
Substances obtained by means of composting	✔
Petrol		✘
Diesel		✘
Heating oil		✘