Bentonite Based, Swelling Waterstop - SWELLBAND

Bentonite Based, Swelling Waterstop - SWELLBAND


SWELLBAND is an active sodium bentonite/butyl rubber based waterstop designed to stop water infiltration through cast in place concrete construction joints by expanding upon contact with water to form a positive seal against the concrete. It also fills the cracks and pores on the concrete.

Fields of Application

Features and Benefits

Technical Data


Volume Change (DIN 53521)

Swelling Pressure

Shore A Hardness (DIN 53505)

Elongation at Break (DIN 53504)

HS Code

 : Sodium bentonite/butyl rubber based

 : >100% after 7 days in water

>150% after 14 days in water

>100% after 10 times dry/wet cycle

(1 cycle : 7 days dry and 7 days water)

 : >15 bar (after 7 days in water)

 : 35

 : >250%

 : 4008.

Application Procedure

Preparation of Substrate

The surface must be clean and dry. It must not be applied to wet, frozen, greasy or dusty surfaces, and under wet weather conditions. SWELLBAND should be protected from humidity and rain before the application.

Application Method

Roll out required amount of SWELLBAND. SUPERTACK 290 is placed in the middle of the joints and SWELLBAND is glued on it and fixed on the surface. Place seams side by side or end to end; do not overlap. Make sure waterstop covers all parts of the surface, especially for surfaces which are not perfect in shape. Remove silicon paper and pour concrete carefully and indirectly. It is not suitable for the joints of precast building elements.


Depends on application areas.


5 mm x 20 mm - 15 m/box

10 mm x 20 mm - 10 m/box

15 mm x 20 mm - 5 m/box

20 mm x 25 mm - 5 m/box

Shelf Life

12 months in original, unopened package.


Store in dry area between +5°C and +35°C. Protect from heat, freezing and direct sunlight.

Cleanup Information

Clean tools and equipment with water immediately after use. Dried material can only be removed mechanically.

Cautions / Limitations

Health and Safety

Warning! Cause eye and skin irritation. If eye or skin contact, get immediate medical attention. If swallowed, do not induce vomiting. Call a physician or poison control center. Never give anything by mouth to an unconscious person.

Wash hands thoroughly after handling. Wear protective clothing, gloves, eye and face protection. Do not eat, drink or smoke when using this product. Take off contaminated clothing and wash it before reuse. Dispose of unused, contents, container and other contaminated wastes in accordance with local, state, federal and provincial regulations.

Keep container closed when not in use. Keep out of the reach of children.

Limited Warranty: This product is subject to a written limited warranty which can be obtained free of charge from BAUMERK Company. Please contact with technical service department for further information and support.

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