H-BAU Technik SWELLFLEX® waterstop tapes are used for sealing construction joints in concrete constructions. They can be butt jointed as their high swelling power generates sealing pressure against the surrounding concrete. Bentonite waterstop tapes create a self-injecting effect, i.e. the material penetrates into and seals all surrounding cracks and cavities. In contrast, rubber waterstop tapes retain their form, making them ideal for use in combination with prefabricated components. The waterstop tapes are installed between the layers of reinforcement with a minimum spacing of 80 mm.
SWELLFLEX®

SWELLFLEX® BS
Bentonite waterstop tape

SWELLFLEX® BT
Bentonite waterstop tape with rainproof coating

SWELLFLEX® RB
Rubber swelling tape with retardation layer
Vorteile
- In line with German watertight structure guideline; with German building code test certificate (abP)
- Proven in building construction, civil engineering and structural engineering
- Can swell and shrink again many times
- Easy to use
- Resistant to ageing
- Suitable for zones subject to repeated wet and dry cycles
- Resistant to chemical and physical stresses
- Can be combined with other joint seals
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Technical Information SWELLFLEX®
Technical Information

General Building Code Test Certificate SWELLFLEX® BS
General Building Authority Test Certificate
PDF (595.30 KB)
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General Building Code Test Certificate SWELLFLEX® BT
General Building Authority Test Certificate
PDF (613.45 KB)
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General Building Code Test Certificate SWELLFLEX® RB
General Building Authority Test Certificate
PDF (524.59 KB)
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Price list 2026 Shell construction / facade
Valid from February 1st, 2026