High-performance Water Swellable Bar 25x25mm

Product Description

A Water Swellable Bar 25x25mm is a high-performance hydrophilic sealing strip made from bentonite clay or rubber-based swellable materials designed to prevent water ingress in concrete joints, pipe penetrations, and other vulnerable areas in construction. The 25x25mm size indicates a larger cross-section, ideal for sealing wider or deeper joints and handling higher water pressures.

Product Overview Water Swellable Bar 25x25mm

Dimensions:

• Width: 25mm

• Height/Thickness: 25mm

• This larger size provides greater swelling capacity and stronger water resistance, ideal for critical sealing zones.

Key Properties:

1. Swelling Capability:

   • Swells up to 300%400% of its dry volume when exposed to water.

   • Forms a tight, pressure-resistant seal inside joints and cracks.

2. Composition Options:

   • Bentonite-Based: Natural clay that swells on water contact.

   • Rubber-Based (Hydrophilic Rubber): Offers elasticity and chemical resistance in addition to swelling.

3. Self-Sealing:

   • Automatically activates on contact with waterno primer or external treatment required.

4. Flexible & Durable:

   • Accommodates minor structural movements without losing sealing performance.

5. Chemical Resistance:

   • Resistant to a wide range of chemicals found in groundwater or construction environments.

Applications:

• Construction Joints in concrete (vertical or horizontal)

• Basement Walls & Foundations

• Tunnels, Dams, Reservoirs

• Water Tanks & Sewage Treatment Plants

• Pipe and Duct Penetrations through concrete

• Precast Elements joints and lift shafts

Advantages:

• High Swell Volume: Fills voids efficiently even in large or uneven joints.

• No Maintenance Required

• Simple Installation

• Cost-Effective Waterproofing

• Long Service Life

• Environmentally Friendly (especially bentonite versions)

Installation Tips:

1. Surface Preparation:

   • Clean the concrete surface of dust, oil, and loose particles before placing the bar.

2. Fixing Method:

   • Use nails, adhesive glue, or mesh wire to secure the bar to the concrete surface or formwork.

   • Ensure full contact with the joint surface.

3. Joint Overlaps:

   • Overlap ends by at least 50mm or use a butt joint with adhesive to prevent water bypassing.

4. Concrete Cover:

   • Ensure a minimum 50mm concrete cover around the bar to allow for safe expansion and containment.

5. Avoid Premature Swelling:

   • Protect bars from water exposure before concrete pouring (cover with plastic if needed).

Would you like to compare bentonite vs. hydrophilic rubber water swellable bars, or need a spec sheet for 25x25mm bars for a tender or site use?