Waterstop Strip Will Expand When Touching With Water

Waterstop strip is a special new type waterproof products, not only it has performance of ordinary rubber products, but also its waterproofing property is better and more reliable than common rubber waterproof products. When it touch with water, its volume will swell three or four times than original volume and it will stuff up all irregular concrete joint, then achieve to stop leak thoroughly.

It can be divided into BW type and PZ Type. Any client can select it according to different demand of water-proof construction.

Black BW type waterstop strip is filled in a carton.
BW type waterstop strip is mainly used for concrete project to seal concrete joint.
Red PZ type waterstop strip is put on a carton.
PZ type waterstop is made by vulcanizing process and it is widely used in concrete joint.

Difference in PZ Type and BW Type

  • The performance of PZ Type is better than BW Type.
  • PZ Type is vulcanized rubber, instead, vulcanized process isn’t necessary for BW type.
  • Almost all BW type is back in market, but PZ Type can be produced in different color, such as black, red, blue and so on (red and blue are more popular in market).
BW Type Parameter
Item Index
BW-150 BW-220 BW-300
Expansion Rate % 150 220 300
Flow at high temperature(80℃×5h) No flow
Low temperature test(-20℃×2h) No embrittlement
PZ Type Parameter
Item Index
PZ-150 PZ-250 PZ-400 PZ-600
Hardness (Shore A) 42±7 45±7 48±7
Tensile strength/Mpa≥ 3.5 3
Elongation at break/%≥ 450 350
Expansion rate in volume/% 150 250 400 600
Repeated water immersion test Tensile strength/Mpa≥ 3 2
Elongation at break/%≥ 350 250
Expansion rate in volume/%≥ 150 250 300 500
Low temperature bending(-20°C*2h) No crack
expanded blue and red waterstop strip.
PZ type waterstop can be made with different color.
Tested two pieces waterstop strip.
10x20mm waterstop strip can expand 400-450%.

Waterstop strip can be widely applied to various types of concrete structures, such as: dams, reservoirs, subway, culverts, tunnels and other underground works.

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Zaoqiang Dacheng Rubber Co., Ltd.
E-mail: grady@zqdcrubber.com

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