KrasoFlex Star Tube - Concrete Crack Inducer

KRASO-Flex Star Tube: The Innovative Crack-Inducing Solution for Watertight Concrete Construction

Looking for a reliable, crack-inducing product that ensures both controlled cracking and watertightness in your concrete structures? The KRASO-Flex Star Tube is purposefully engineered to guide unavoidable shrinkage cracks to a predetermined location—helping you avoid costly, unplanned cracks that can compromise structural integrity.

The KRASOflex Star Tube is redefining how controlled crack elements are incorporated into both precast and in-situ concrete walls for joints and and corner areas. 

What Makes the KRASO-Flex Star Tube So Effective?

1. Dual Functionality
   Designed with four profiled sealing anchors and two smooth, pre-perforated crack-guiding fins, the Star Tube not only induces cracks in a controlled manner but also helps maintain a watertight seal. This makes it ideal for high water penetration resistance applications, particularly in walls and other vertical elements.

2. Hollow Core for Stability
   The hollow cylindrical core carries the sealing anchors and fins, providing high stability and low weight. Once filled with concrete, it minimises the amount of injection material needed for potential future repairs—perfect for maintaining strong, durable structures over the long term.

3. Versatile Installation
   Suitable for cast-in-place and precast concrete construction, the Star Tube is installed prior to concreting. An optional KRASOflex Star Tube Installation Kit simplifies positioning in base slab–wall junctions, ensuring you achieve precise crack induction in the exact area you need.

4. Certified for Performance
   Backed by a test certificate for use as an internal seal in designed crack sections, the KRASO-Flex Star Tube meets demanding standards for waterproof construction. Whether you’re working on basement walls, tunnel linings, or other critical projects, you can rely on its proven performance.

5. Factory-Punched Holes
   Every 20 cm, the Star Tube features pre-punched holes for quick and reliable fixing. This ensures the tube remains firmly in position throughout the pouring process, preventing any unwanted movement or misalignment.

Key Specifications

• Certified for Water Pressure up to 2 bar
  Building Authority Test Certificate (abP) P-MPA-BS240049
• MPA-Tested up to 5 bar
  Proven performance under higher pressures
• Fits Over Slots: 15 × 50 mm
  Ideal for installation on joint tape or joint plates
• DafStB Waterproof Concrete Guideline
  Compliant with Stress Class 1 + 2 requirements

Boost your concrete construction quality and protect against uncontrolled cracks with the KRASO-Flex Star Tube—the innovative, crack-inducing solution that delivers long-term waterproofing and structural reliability. Order now and experience the future of controlled cracking technology for yourself!

Selection Chart

**Custom sizes available on request**