K‑FLEX ST/SK Self‑Seal Tube is a flexible elastomeric tube with factory‑applied adhesive closure for fast, clean installation. It provides the same closed‑cell performance as standard ST with reduced installation time and consistent sealing.
Key Features
- Self‑seal adhesive closure system for rapid fit‑off.
- Service temperature (ST/SK): −40 °C to +85 °C.
- Fire performance (ST/SK): Euroclass BL‑s2,d0.
- Water vapour diffusion resistance: μ ≥ 7,000.
- Supplied in 2 m lengths across common HVAC bores and thicknesses.
Thermal Conductivity
| Thermal Conductivity (EN 12667 / EN ISO 8497) | ||
|---|---|---|
| Thickness | Temperature | λ [W/m·K] |
| ≤ 25 mm | −20 °C | 0.031 |
| ≤ 25 mm | 0 °C | 0.033 |
| ≤ 25 mm | +20 °C | 0.035 |
| ≤ 25 mm | +40 °C | 0.037 |
| > 25 mm | −20 °C | 0.034 |
| > 25 mm | 0 °C | 0.036 |
| > 25 mm | +20 °C | 0.038 |
| > 25 mm | +40 °C | 0.040 |
Installation Benefits
- Up to 50% faster installation vs traditional tape methods.
- Consistent seal quality - adhesive strip ensures reliable joint performance.
- Reduced labour costs - no need for separate adhesive or tape.
- Professional finish - clean, uniform appearance.
Applications
- HVAC systems and air conditioning
- Refrigeration pipework
- Chilled water systems
- Heating and plumbing installations
- Commercial and residential projects
Installation Notes
- Align and press adhesive edges together along the longitudinal seam.
- Seal joints with compatible tape where required.
- For overlap version, follow manufacturer guidance to position and close the pre‑applied overlap.
Compatible Accessories
Complete your installation: ST Tube · K-420 Adhesive · AT070 Tape
Select your required bore size and wall thickness from the variants below.
UK Stock | Fast Delivery | Technical Support Available
