NATCEM - Waterstop

WaterStop is a fast setting material based on a potable water approved natural cement, it is an environmentally friendly, fast setting, water stopping material that at 20ºc starts to set in 90 seconds and is totally set in 2½ minutes. It is also Reg.31 approved for contact with drinking water. The product only requires to be added to water and mixed for two minutes (see mixing instructions for further details) and provides a waterproof barrier. It can be used in cold & wet conditions, sets under water and from a minimum of 1 mm can be, if required, built up layer on layer to any thickness.

Recommended Uses

• • Chemical Resistance

• • Reg.31 Approved Products for contact with drinking water

• • Concrete Repairs

• • Tanking

• • Sealing leaks

• • Stopping ingress of water

Sectors

• • Utilities

• • Construction

• • Civil Engineering

• • Railways

• • Sea Defence

• • Mining

• • Water

Product Advantages

• • Fast controllable set

• • No curing membrane necessary

• • Waterproof

• • Set under water

• • Resistant to chemicals

• • Potable water approved

• • Safe with drinking water

• • Safe with aquatic life

• • Can be mixed with seawater

• • Resistant to seawater

• • Very low shrinkage

• • Low Reactivity (No Conversion)

• • High Alkalinity (No Rusting)

• • Excellent Adhesion

• • Fine compact surface

• • Sets down to Zero degrees

• • Starts to set in 90 seconds at 20˚c

Setting Times;

NATCEM 35 is designed to commence setting at 35 minutes and finish setting at 40 mins at 20°c. In winter NATCEM 35 can be used down to 0°c. The set will be slower but can be accelerated by using warm water. In very hot temperatures the set will be faster and can be slowed by using cold water.  

Surface Preparation;

Do not use on frozen or over heated substrates (Outside the range of 0°c – 30°c). Prepare the surface in advance to provide an adequate key. On glazed brickwork the joints should be raked out and the surface bush hammered to form a key. The surface to which the NATCEM 35 is applied should be clean, free from dust and thoroughly dampened. Where necessary steel or aluminium mesh can be used. Ensure that a 10 mm minimum thickness of material is obtained.