Hydrotite

Uses

Hydrotite is used where watertight integrity is the prime issue. Typical applications include construction joints in:-

• Sewerage & water treatment plants
• Pipe penetrations
• Subway stations
• Swimming pools
• Basements
• Reservoirs
• Tunnels
• Pits

Advantages

• Self-adhesive makes installation easier and reduces construction costs
• Co-extruded design means expansion is directed across the joint for maximum seal
• Delay coating to help prevent premature expansion
• Unaffected by repeated wet and dry cycles
• No site welding as is required for traditional PVC waterstops
• No need for special intersections, joining is by simple butt joins
• Can be applied to rough surfaces using Leakmaster gun grade waterstop
• Can be joined to traditional PVC waterstop
• No compaction or displacement problems
• Non toxic and non hazardous

Description

Hydrotite is a hydrophilic waterstop which exibits excellent durability and water sealing capacity. It expands as it absorbs water and fills concrete joint gaps conforming to the gap variation, ensuring excellent sealing. Hydrotite is based on the technology of hydrophilics, a material which expands in a controlled fashion by approximately eight times by volume in the presence of moisture to create a pressure seal within the joint.

When properly installed Hydrotite is capable of sealing heads of water up to 50 m and is used throughout the construction industry to seal horizontal and vertical construction joints for poured in-situ concrete. Hydrotite offers various profiles for in-situ concrete construction joints such as DSS0220, CJ0725, CJ1020.

It consists of a unique combination of expanding hydrophilic materials and non-expanding chloroprene rubber co-extruded together to form a single strip. The expanding section is blue with the non expanding section being black. The co-extruded design means that the expansion is directed across the joint for maximum sealing performance. This expansion creates an effective compression seal within joints which shuts out the water path. Upon expansion Hydrotite turns from a dark blue colour to a light blue colour so that a visual inspection of the Hydrotite can be made and the contractor can check if the Hydrotite has not pre-expanded. Hydrotite is treated with a delay coating to prevent it from absorbing water from the moist green concrete, to help stop any premature expansion should the joint become ponded with water prior to the second pour and to stop any premature expansion taking place before curing of the concrete.

For areas where ponding or running water may be a problem, please contact Parchem for advice. Hydrotite rectangular profiles are supplied with a self-adhesive backing which makes installation easier and lowers construction time and costs. The self-adhesive backing means that the purchase of other construction adhesives is not required and also saves the contractor the installation costs of applying the adhesive to the concrete. Hydrotite, as with any hydrophilic waterstop will return to its original size if there is no more water or moisture present. Hydrotite will then re-expand when water or moisture is again introduced to the joint. Some leakage may occur before Hydrotite re-expands fully.

Repeated wet and dry cycling of this nature does not effect the functioning of Hydrotite.