Browse our complete range of K-FLEX elastomeric pipe insulation. Available in both unslit tube (ST) and self-seal (ST/SK) formats to suit your installation requirements.

K-FLEX ST (Unslit Tube)

Traditional tube insulation for custom-fit applications
Ideal for irregular pipe configurations
Temperature range -165°C to +110°C
Fire rated BL-s2,d0

K-FLEX ST/SK (Self-Seal)

Pre-slit tube with integrated adhesive strip
Faster installation and superior joint sealing
Same premium nitrile rubber construction
Perfect for standard pipe runs

Shop by Wall Thickness: 9mm | 13mm | 19mm | 25mm | 32mm | 40mm | 50mm

Shop by Bore Size: 15mm | 22mm | 28mm | 35mm

Explore Other Ranges: K-FLEX PE | K-FLEX PE PLUS | K-FLEX PE COLOR | K-FLEX SOLAR HT | K-Rock Foiled

📚 View Installation Guides & Technical Specifications

Premium elastomeric nitrile rubber insulation for HVAC, refrigeration, and plumbing systems. CE certified. UK supplier.

K-FLEX Elastomeric Insulation (ST & ST/SK)

K‑Flex ST Tube 6mm × 6mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 6mm × 6mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 6mm × 6mm × 2m | Elastomeric Nitrile Rubber Insulation

£1.92
K‑Flex ST Tube 6mm × 10mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 6mm × 10mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 6mm × 10mm × 2m | Elastomeric Nitrile Rubber Insulation

£2.06
K‑Flex ST Tube 9mm × 6mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 9mm × 6mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 9mm × 6mm × 2m | Elastomeric Nitrile Rubber Insulation

£2.22
K‑Flex ST Tube 6mm × 12mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 6mm × 12mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 6mm × 12mm × 2m | Elastomeric Nitrile Rubber Insulation

£2.29
K‑Flex ST Tube 6mm × 15mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 6mm × 15mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 6mm × 15mm × 2m | Elastomeric Nitrile Rubber Insulation

£2.44
K‑Flex ST Tube 9mm × 10mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 9mm × 10mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 9mm × 10mm × 2m | Elastomeric Nitrile Rubber Insulation

£2.46
K‑Flex ST Tube 9mm × 12mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 9mm × 12mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 9mm × 12mm × 2m | Elastomeric Nitrile Rubber Insulation

£2.49
K‑Flex ST Tube 6mm × 18mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 6mm × 18mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 6mm × 18mm × 2m | Elastomeric Nitrile Rubber Insulation

£2.54
K‑Flex ST Tube 9mm × 15mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 9mm × 15mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 9mm × 15mm × 2m | Elastomeric Nitrile Rubber Insulation

£2.58
K‑Flex ST Tube 6mm × 22mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 6mm × 22mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 6mm × 22mm × 2m | Elastomeric Nitrile Rubber Insulation

£2.77
K‑Flex ST Tube 13mm × 6mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 13mm × 6mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 13mm × 6mm × 2m | Elastomeric Nitrile Rubber Insulation

£2.92
K‑Flex ST Tube 9mm × 18mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 9mm × 18mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 9mm × 18mm × 2m | Elastomeric Nitrile Rubber Insulation

£3.08
K‑Flex ST Tube 9mm × 20mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 9mm × 20mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 9mm × 20mm × 2m | Elastomeric Nitrile Rubber Insulation

£3.20
K‑Flex ST Tube 9mm × 22mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 9mm × 22mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 9mm × 22mm × 2m | Elastomeric Nitrile Rubber Insulation

£3.21
K‑Flex ST Tube 13mm × 12mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 13mm × 12mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 13mm × 12mm × 2m | Elastomeric Nitrile Rubber Insulation

£3.43
K‑Flex ST Tube 13mm × 15mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 13mm × 15mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 13mm × 15mm × 2m | Elastomeric Nitrile Rubber Insulation

£3.49
K‑Flex ST Tube 9mm × 28mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 9mm × 28mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 9mm × 28mm × 2m | Elastomeric Nitrile Rubber Insulation

£3.61
K‑Flex ST Tube 6mm × 28mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 6mm × 28mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 6mm × 28mm × 2m | Elastomeric Nitrile Rubber Insulation

£3.63
K‑Flex ST Tube 13mm × 18mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 13mm × 18mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 13mm × 18mm × 2m | Elastomeric Nitrile Rubber Insulation

£3.69
K‑Flex ST Tube 9mm × 35mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 9mm × 35mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 9mm × 35mm × 2m | Elastomeric Nitrile Rubber Insulation

£3.90
K‑Flex ST Tube 13mm × 20mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 13mm × 20mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 13mm × 20mm × 2m | Elastomeric Nitrile Rubber Insulation

£3.94
K‑Flex ST Tube 6mm × 35mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 6mm × 35mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 6mm × 35mm × 2m | Elastomeric Nitrile Rubber Insulation

£4.08
K‑Flex ST Tube 13mm × 22mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 13mm × 22mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 13mm × 22mm × 2m | Elastomeric Nitrile Rubber Insulation

£4.15
K‑Flex ST Tube 9mm × 42mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 9mm × 42mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 9mm × 42mm × 2m | Elastomeric Nitrile Rubber Insulation

£4.65

K-FLEX ST (Unslit Tube)

K-FLEX ST/SK (Self-Seal)

K-FLEX Elastomeric Insulation (ST & ST/SK)

K‑Flex ST Tube 6mm × 6mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 6mm × 10mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 9mm × 6mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 6mm × 12mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 6mm × 15mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 9mm × 10mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 9mm × 12mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 6mm × 18mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 9mm × 15mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 6mm × 22mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 13mm × 6mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 9mm × 18mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 9mm × 20mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 9mm × 22mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 13mm × 12mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 13mm × 15mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 9mm × 28mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 6mm × 28mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 13mm × 18mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 9mm × 35mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 13mm × 20mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 6mm × 35mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 13mm × 22mm × 2m | Elastomeric Nitrile Rubber Insulation

K‑Flex ST Tube 9mm × 42mm × 2m | Elastomeric Nitrile Rubber Insulation