Hydrophilic Waterstop System
Hydrophilic Butyl Waterstop Seal
Hydrophilic Butyl Waterstop Seal is a unique sealing compound which expands in a controlled fashion when exposed to moisture, forming a compression seal in concrete joints. It is ideal for use in horizontal and vertical construction joints for cast in-situ concrete structures.
It is manufactured utilising a specialised mixing process which encapsulates hydrophilic materials into a Butyl base creating a controlled, moisture-activated seal. The product has the structural integrity and the long term durability features of Butyl, as well as the ability to expand to create a SELF-HEALING JOINT WATERSTOP SEAL.
Unlike many of the traditional clay-based products, it is being hydrophilic polymer based, will not expand to a point that the hydration process itself leads to the possible “disintegration” of the waterstop due to its expansion control system. This is an important issue when the engineers are looking for a seal in vertical construction joints where the joint can open due to excessive shrinkage in the concrete. In-field experience has proven that products which continually expand, may lose their structural integrity and begin to wash away from the joint when subject to a constant flow of water or from high water pressure.
It does not expand prematurely from the wet weather due to its unique expansion control system which also means it doesn’t expand from the water in the fresh concrete when poured against it, which helps minimize any pre-expansion if the joint becomes ponded with water. It is very unique in that it can be installed by embedding it into wet concrete of the first pour as the concrete upon drying bonds very well to the Butyl Seal.
It has been tested to withstand a 60 metre (6.0 Bar) head of water pressure in potable and salt water conditions.
Due to its Butyl properties, it bonds to both concrete surfaces (1st and 2nd pour) creating a gasket seal first, when used in conjunction with CJ-100 Adhesive. The wet concrete from the 2nd pour bonds tenaciously to it.
It complies to NSF/ANSI Standard 61 Drinking Water System Components – Health Effects, ensuring it is safe for use in drinking water applications. Therefore, it is suitable to use in various potable water retaining structures like water tanks, swimming pools and reservoirs.
- Conforms easily for installation onto rough or smooth concrete surfaces.
- Excellent adhesion to concrete with CJ-100 Adhesive.
- Allows concrete to gain strength before expansion due to built-in expansion control system.
- For use in horizontal and vertical construction joints.
- Long term durability & integrity.
- Can be bedded into the wet concrete of the first pour for installation.
- No compaction or displacement problems.
- Unaffected by repeated wet and dry cycles.
- Has the ability to bond to both concrete surfaces.
- No on-site welding required.
- Can withstand 60 metres (6.0 Bar) of hydrostatic head pressure.
- Ability to handle long-term exposure to the environment prior to the 2nd pour taking place.
- Non-toxic and requires no special handling.
- NSF Certified for use in potable water applications.
- Very easy to handle and install.
Packaging & Dimensions
25mm x 19mm x 5m rolls (6 rolls per carton = 30 metres per carton)
CJ 100 Adhesive – 1 litre & 3.6 litres per tin
Note : Coverage Approximately 20 – 30 metres per 1 litre
Areas of Application
Water Retaining Structures
- Water tanks
- Sewage treatment plants
- Water treatment plants
- Swimming pools
- Box culverts
- Bund walls
Water Excluding Structures
- Underground structures
- Retaining walls
- New to old concrete
- Poured in-situ construction joints
- Roof slabs
- Suspended slabs
- Above & below grade precast panels (check with Corkjoint & your Engineer)
Note : The products design and performance, its intended use, installation and final confirmation and approval for use,
must be provided by the project’s Design Engineer and Project Manager.
Due to expansive forces, it should be both detailed and installed with a minimum 50mm clear cover to the face of the concrete. Expansion rate can vary in salt and contaminated water. Increase cover when using light weight, low strength concrete. Not for use where excessive shrinkage of the concrete may occur at the joint faces. Do not stretch it during installation. Not for use in movement (expansion, isolation and contraction) joints.
It requires a minimum 50mm cover of concrete from the outside edge.
- Brush off any dust or debris from the surface where the it is to be applied. Brush a coat of CJ-100 Adhesive 30mm wide onto the concrete surface and one coat to the surface.
- Once both surfaces where the adhesive was applied are touch dry, with the use of your thumbs or heel of your hand, firmly press a continuous bead into position, making sure you achieve full contact with the adhesive on the concrete surface. Do not stretch it when applying it into position.
- Use a neat, firm butt join to join together and then knead the ends together to form a continuous uninterrupted gasket. This type of join is used for continuous placement and for any intersection joins.
- Check to see that it has totally adhered to the concrete surface. If the surface is rough or irregular, you may need to use a firmer hand pressure to make sure that it has full contact with the surface. There must be no visible gaps after installation.
- The protective paper layer cover on it can be removed any time prior to the second pour of concrete taking place.
- Placement of the second pour of concrete can be applied once the CJ-100 Adhesive has dried. Upon pouring, make sure the concrete is properly compacted and vibrated around it.
- If it has been exposed to water (moisture) prior to the second pour taking place, check for pre-expansion. If the product has pre-expanded, then remove that section and replace with a new length.
- For vertical construction joints and overhead applications, it may be necessary to also secure it with nails, placed approximately every 250mm apart. This is usually only required as extra security if you need to pour your concrete prior to the CJ-100 Adhesive drying completely.
- If it is going to be exposed to moisture or submerged in water longer than 5-7 days, then a coating of CJ-100 Expansion Delay Coating may need to be applied to all exposed areas.
Test Reports – Independent Laboratory
- Exposure & Water Immersion Expansion in Potable Water
- Exposure & Hydrostatic Head Pressure (cyclic wet & dry) in Potable Water
- Water Immersion Expansion in Salt Water (5% NaCI)
- Hydrostatic Head Pressure in Salt Water (5% NaCI)
- National Sanitation Foundation (NSF) Certification for Potable Water Use
Note : The above test reports are available upon request.
Waterstops where shown on the drawings shall be controlled expansion waterstop as supplied. The waterstop is to have a built-in expansion control system to minimise any pre-expansion prior to the second pour taking place and be able to withstand up to 60 metres (6.0 Bar) hydrostatic head pressure resistance. The waterstop is to be placed in accordance with the manufacturer’s installation guidelines, and the Design Engineer’s specification.
Health And Safety Information
In confined spaces or in still air conditions, the use of a ventilation fan or suitable respirator should be used, and the advice and approval of the Site Safety Supervisor is essential. For further information or advice on health and safety precautions, safe handling, storage and correct disposal of products, please refer to the most recent product Safety Data Sheet (SDS), which is available upon request.