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AKVASTOP

AKVASTOP PNB swelling bentonite profile — strip for construction joints

The PNB profile is made of natural sodium bentonite and butyl rubber, with a polymer content of at least 50 %. On contact with water the strip expands in volume by up to 200 %, and its resistance to hydrostatic pressure depends on the section: from 10 atm for 20×10 to 18 atm for 25×19 mm. It is laid in construction joints, floor-to-wall and wall-to-roof-slab junctions, joints of precast reinforced concrete and utility penetrations; the profile is not intended for expansion and shrinkage joints with movement.

Specifications

ManufacturerAKVASTOP — OOO “Akvabarier”
Typewaterstops and swelling profiles
Usefoundations and basements, tunnels and metro, joints and junctions, leak repair
Baserectangular-section strip of natural sodium bentonite and butyl rubber (polymer content at least 50 %)
Colourgreen
Packaging20 m box (4 coils of 5 m) interleaved with release paper
Application methodinstalled immediately before concreting; remove the release paper; laid in the central part of the section, no closer than 70 mm to the faces; butt-jointed; fixed with metal mesh and dowels every 150–200 mm; avoid prolonged contact with rainwater before concreting
Application temperature−15…+50 °C
Key propertiessections 20×10, 20×15, 25×15, 25×19 mm (“Industrial” type); specific gravity 1.35 g/cm3; volumetric expansion on contact with water up to 200 %; resistance to hydrostatic pressure 10 / 12 / 16 / 18 atm (for sections 20×10 / 20×15 / 25×15 / 25×19); not for expansion and shrinkage joints with movement

Data from the manufacturer’s technical data sheet. The coating system, number of coats and quantity are selected for your project on request.

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