Applications, properties and benefits

FUMAX® Typ C is a polymer swelling strip based on a tough and flexible acrylate polymer that is highly resistant to chemicals.

On contact with water, the FUMAX® type C swelling strip increases in volumne without changing its homogeneous chemical structure. The resulting contact pressure achieved by the FUMAX® Typ C swelling strip ensures a tight surface seal and prevents water permeation.


- Easy to install and work with (see notes on
  installation FUMAX®)
- Outstanding swelling capacity achieves a tight
  seal
- Installation does not give rise to additional
  labour and material costs
- For gap and crack widths of 0 - 7 mm; durably
  seals cracks up to 50 m water column (5 bar)
- Standard quality (freshwater) reliably resists
  electrolytes and chemicals


FUMAX® Typ C swelling strip can be used wherever direct contact with water is possible (prefabricated construction)

See separate "Planning documents" for bill of quantities.

Flexible swelling strip for all construction joints

Applications, properties and benefits

FUMAX® is a sodium-bentonite-based swelling strip. The natural clay swells substantially as it absorbs a large amount of water. When installed, a tight seal is obtained by the pressure exerted by the swelling strip.

- FUMAX® is a flexible material. Movement in the
  joint caused by builing settlement, for example,
  does not impair the sealing effect
- Its continuous hydraulic swelling behaviour
  enables FUMAX® to penetrate all cracks and
  cavities
- Easy and quick to install, simple butt joints, no
  overlaps, no welding
- Efficient, durable seal up to 10 m water column
- Swelling capability fully retained with no loss of
  performance in locations subjected to
  fluctuating water loads
- Ideal for use in conjunction with crack control
  rails

Notes on installation
- The laying surface must be free of loose
  material and stagnant water (DIN 1045,
  paragraph 10.2.3)
- FUMAX® is laid in the centre of the
  construction joint. The ends of the strips must
  meet without overlapping.
- Attach fixing rail and secure with a clamp and
  cap-head bolts or impact plugs with spacing
  approx. 25 cm
- For use with cap-head bolt drill bore hole,
  diametre 5 mm, depth 40 mm
- Locate fixing lattice and attach the disc with
  the pin

See separate "Planning documents" for bill of quantities.