Water leakage through construction joints is one of the most critical causes of concrete failure in roofs, basements and water retaining structures. In Pakistan’s harsh climate, improper joint sealing often leads to persistent seepage, structural deterioration and costly repairs.

Aquafin CJ6 is a high performance swellable waterstop tape designed to provide a reliable and long lasting roof leakage solution for concrete construction joints making it one of the best water stop tapes for waterproofing used by professional waterproofing companies in Pakistan.

What is Aquafin CJ6?

Aquafin CJ6 is a thermoplastic elastomer (TPE) based swellable waterstop tape that expands on contact with water. Once embedded in concrete joints, it swells to tightly seal cracks, voids and construction joints, preventing water ingress even under pressure.

Aquafin CJ6 protects concrete structures from:

  • Roof water leakage and seepage.
  • Pressurized groundwater.
  • Water penetration through construction joints.
  • Moisture ingress in concrete structures.

It is an essential component of a complete waterproofing system in Pakistan for new construction projects.

Swelling & Sealing Performance

Aquafin CJ6 delivers rapid and powerful sealing action:

  • Watertightness: tested up to 4 bar water pressure.
  • Swelling start: approx. 2 hours after water contact.
  • Swelling pressure: approx. 1.06 N/mm².
  • Swelling rate:
    • ~50% after 2 hours.
    • ~460% after 24 hours.
    • ≥700% after 8 days.

This self-injecting swelling action ensures excellent roof leak proofing and joint sealing.

Key Technical Advantages

  • High-performance roof waterproofing tape.
  • Rapid and controlled swelling on water contact.
  • Excellent dimensional stability, even at high temperatures.
  • Self-sealing action for cracks and cavities.
  • Suitable for fresh and salt water exposure.
  • Easy and fast installation.
  • Tested and certified watertight concrete sealing system.

These features make Aquafin CJ6 a trusted waterproofing compound for critical joint protection.

Applications

Aquafin CJ6 is ideal for waterproofing:

  • Construction joints in concrete roofs.
  • Roof slabs and structural joints.
  • Basements and foundations.
  • Retaining walls.
  • Water tanks and underground structures.
  • Concrete elements exposed to hydrostatic pressure.

It is widely used as a roof waterproofing material by professional waterproofing companies in Karachi, Lahore and across Pakistan.

Application & Installation

  • Application temperature: 0°C to 50°C.
  • Installation methods:
    • Bonding with mounting adhesive for swellable waterstops.
    • Mechanical fixing with steel nails (minimum 5 nails per meter).
  • Concrete cover: minimum 8 cm on water exposed side.
  • Concreting: can be done after 8 hours of bonding.

Application Method

  • Ensure the substrate is dry, clean, and free from contaminants.
  • The surface may be matt damp; standing water must be avoided.
  • Fix Aquafin CJ6 securely along the construction joint using adhesive or nails.
  • Avoid looping, gaps, or cavities during installation.
  • Overlap tape joints by at least 5 cm, or use butt joints secured with an additional overlapping strip.
  • Inspect the tape before concreting to ensure it has not pre-swollen.

Frequently Asked Questions (FAQs)

What is Aquafin CJ6 used for?

Aquafin CJ6 is used as a waterstop tape for waterproofing construction joints in concrete structures.

Is Aquafin CJ6 suitable for roof waterproofing?

Yes, it is highly effective for roof waterproofing where construction joints are a common source of leakage.

Can Aquafin CJ6 stop roof leakage permanently?

When installed correctly, it provides a long term roof leakage solution by sealing joints through controlled swelling.

Is Aquafin CJ6 suitable for use in Pakistan’s climate?

Yes, it performs reliably in Pakistan’s temperature variations and is suitable for both fresh and salt water exposure.

Why is Aquafin CJ6 considered a high performance roof protection solution?

Because it offers rapid swelling, high water pressure resistance and durable sealing of construction joints.

Conclusion

If you are looking for the best waterstop tape for waterproofing construction joints, Aquafin CJ6 is a proven and reliable solution. Its swellable technology, high pressure resistance and easy installation make it an essential component of any roof waterproofing system in Pakistan, ensuring long lasting protection against leakage and seepage.

For more premium waterproofing solutions and detailed product information, visit our website and explore our complete range of waterproofing products.