A flexible hydrophilic polymer rubber waterstop for construction joints and sealing precast elements that expands in a controlled fashion on contact with water. The bentonite clay in Contite Waterstop consists of tightly packed charged microscopic platelets. Between and within these platelets there is a separation of charges positive and negative. Water molecules are attracted to the unique clay structure of positive and negative charges and wedge themselves between the platelets causing them to separate & swell. The hydrated bentonite forms a seal preventing further migration of water. As hydrostatic pressure is increased the platelets compact forming a tighter seal.

USES & ADVANTAGES
Contite Waterstop is used to stop water infiltration through both vertical and horizontal non moving construction joints, irregular surfaces and around penetrations through concrete. It is not intended as an expansion joint sealant. It is designed to replace conventional waterstops in construction joints. The sodium bentonite in Contite Waterstop is the key to its success. Bentonite swells when in contact with water to form an impermeable barrier. A permanent pressure seal is formed.

Advantages include:
• Light weight flexible coils easy to install.
• Eliminates seem welding & split forming associated with PVC/rubber waterbars.
• Butt end joining, continuous waterstop.
• Withstands hydrostatic head up to 70 metres.
• Forms a positive seal, sealing cracks & small voids.
• May use in potable water tanks. Non toxic.
• Can apply to irregular concrete surfaces.
• Compressible and malleable allowing for good contact in precast applications.
• Unaffected by repeated wetting & drying cycles.
• Does not deteriorate.
• Fast installation.
• Permanently active system.
• Ecologically safe & can be used in structures in contact with potable water.
• Self healing.

Hydrostatic Head Resistance : > 70 m
S.G.                                        : 1.5-1.6 ASTM D297
Wet/Dry Cycling                   : No effect
(25 cycles @70m)
Service Life Elongation
Colour                                   : -40 C to 80 C
Adhesion to Clean                : >300%
Dry Concrete                        : Black or Red
Penetration Cone                  : Excellent
Expansion                             : 4±5 ASTM D-217
: >300%

SURFACE PREPARATION

The surface should be clean and dry with all dirt, aggregate, rust, debris or standing water removed.

HYDROPHILIC CONSTRUCTION JOINT WATERSTOP

Sleeved Pipe: Install around the outer diameter of thePipe sleeve. Install another strip between sleeve’s inner diameter & the pipe if there is an excessive gap between inner diameter of the sleeve & the pipe 2 separate waterstops may require installing one on the inner diameter & the other on the pipe. The void should be filled with Congrout non shrink cementitious grout.

Pile Caps & Grade Beams: Follow the general instructionsBeams: above. Install to all construction joints around or adjacent to pile caps & grade beams. Install Contite Waterstop around pile caps and grade beams above waterproofing. Wrap around all I-beams extending out of pile cap & encircle reinforcement out of pile cap.

Irregular Concrete Surfaces: Follow general instructions above. Press Contite Waterstop against irregular contours filling cavities and cracks do not leave gaps between water bar and surface. It may prove necesary to install in an irregular direction to avoid major depressions or cracks.

Contite Waterstop Delay Coating: If rain is anticipated before the pouring of concrete Contite Waterstop may be protected by Contite Waterstop Delay Coating. The delay coating is applied to the surface of Contite Waterstop either by brush or spray and will delay swelling for up to several days.

SPECIFICATION

The waterstop to be used in all construction joints shall be Contite Waterstop or equal approved material. The waterstop shall consist of sodium bentonite in polymer rubber and expand by at least 300%. It shall be capable of being butt ended, shall not be overlapped nor create a packing effect in the concrete, it shall be pliable so that it follows the contours of the concrete and may be installed to all penetrations. The material will form a positive seal, form a continuous waterstop and withstand hydrostatic pressure up to 70 m.

There are no known hazards associated with Contite Waterstop during normal use. Refer to product material safety data sheet.