Product Facts
- Product Name
- Hydrocor Corkjoint - Type 3 Self Expanding Cork Filler
- Price
- Available
- Availability
- In Stock
- Condition
- New
- Category
- Construction Materials > Joint Fillers & Sealants
- Seller
- Fosroc Workspace
Hydrocor Corkjoint - Type 3 Self Expanding Cork Filler
Hydrocor Corkjoint Type 3 is a self-expanding cork filler used for forming and filling expansion and static joints. Made from cork granules bound together with insoluble synthetic resin, it expands when exposed to moisture and provides semi-rigid, void-free backing for elastomeric sealants subject to hydrostatic pressures. Ideal for filling joints in concrete roads, bridges, carparks and other internal or external traffic areas.
Hydrocor Corkjoint Type 3 is a self-expanding cork filler used for forming and filling expansion and static joints. Made from cork granules bound together with insoluble synthetic resin, it expands when exposed to moisture and provides semi-rigid, void-free backing for elastomeric sealants subject to hydrostatic pressures. Ideal for filling joints in concrete roads, bridges, carparks and other internal or external traffic areas.
Price: Available
Brand: Fosroc
Product Data (OpenAI Spec)
View Full JSON Spec ↗Specifications
| Condition | new |
|---|---|
| Category | Construction Materials > Joint Fillers & Sealants |
Product Intelligence
Hydrocor Corkjoint Type 3: Technical Details, Specifications, and Features
Product Description
Hydrocor Corkjoint Type 3 is a self-expanding joint filler manufactured by Fosroc and supplied by Parchem Construction Supplies. The product is made from cork granules bound together with insoluble synthetic resin, creating a compressible sheet material that expands when exposed to moisture. It provides semi-rigid backing for elastomeric sealants in various construction applications.
Primary Uses and Applications
Hydrocor Corkjoint Type 3 is designed for forming and filling expansion and static joints in multiple infrastructure types:
- Water retaining structures - dams, reservoirs, culverts, canals, sea walls, and water treatment or storage structures
- Water excluding structures - basements, subways, and site slabs
- Roads, bridges, and carparks - both internal and external traffic areas
- General joint applications - providing support for joint sealants subject to pedestrian or wheeled traffic
Key Advantages
- Supports sealants subject to hydrostatic pressure - maintains performance under water pressure conditions
- Expands to fill joints - self-expanding properties ensure void-free backing
- Minimal extrusion under pressure - resistant to displacement during application
- Lightweight and easy to handle - practical for on-site installation
- Resilient and waterproof - maintains integrity in moisture-rich environments
Technical Properties and Specifications
| Property | Value |
|---|---|
| Form | Compressible sheet, resin bonded cork |
| Recovery after 50% compression | Greater than 90%; Less than 6 mm (under test conditions) |
| Extrusion at 50% compression | Less than 1 mm in use |
| Load required to compress to 50% | 1.3 - 1.5 MPa |
| Expansion in boiling water (1 hour) | 40% minimum |
Material Composition
The product consists of two primary components:
- Cork Granules - the primary raw material providing the base structure
- Insoluble Synthetic Resin - binding agent that holds the cork granules together
This combination creates a material that is both compressible and resilient while maintaining waterproof properties.
Application Instructions
Preparation and Installation
- Waterproof wrapping must remain intact until immediately prior to fixing
- The product must be fixed against one section of concrete after shutter removal
- Construction adhesive is used to bond Hydrocor Corkjoint Type 3 to concrete surfaces
- The next concrete section is poured directly against the filler with minimal delays
Slot Formation Methods
After concrete curing, the top section of filler is removed to form a sealing slot using one of two methods:
- Power grinder or saw - mechanical removal to create required slot dimensions
- Alternative method - placing timber or polystyrene foam above the fixed filler to avoid cutting or grinding steps
Bond Breaker Application
Fosroc Bond Breaker Tape must be applied over Hydrocor Corkjoint Type 3 prior to application of joint sealant to ensure proper sealant performance.
Storage Requirements
- Store in original packaging in cool, dry conditions
- Protect from moisture exposure before installation
- Follow expiration dates indicated on packaging
Limitations and Considerations
Concrete Staining
Hydrocor Corkjoint Type 3 may cause staining of surrounding concrete in damp conditions, particularly on:
- Light-colored concrete
- Exposed aggregate finishes produced by high-pressure hosing
Note: Staining typically disappears after 6-8 weeks of normal weathering. For applications where staining is a concern, Fosroc Hydrocell (a non-staining polyethylene foam filler) may be a more suitable alternative.
Traffic Loading
Where traffic loads may be high, it is recommended to recess the joint sealant approximately 2mm below the surface to avoid direct abrasion due to potential expansion of the filler.
Standard Supply Sizes
Hydrocor Corkjoint Type 3 is available in standard sizes:
- 100mm × 10mm × 1.5m
- 125mm × 10mm × 1.5m
- 150mm × 12mm × 1.5m
Custom sizes are also available made to order, ranging from 50mm to 635mm in depth with thicknesses of 10mm, 12mm, 15mm, 16mm, 20mm, 25mm, and 30mm, and lengths of 930mm, 1200mm, 1500mm, and 1800mm.
Documentation and Safety Information
A Safety Data Sheet (SDS) is available from the Fosroc website and must be read carefully prior to use, as application and performance data may change over time. The Technical Data Sheet provides comprehensive guidance on proper use and application of the product.
References
- [1] Fosroc_Hydrocor_Corkjoint_Type_3_TDS.pdf