Interior pipe insulation that reduces heat loss and helps control condensation, supplied ready to fit for 22mm bore runs with a self-seal seam, K-flex Interior Pipe Insulation. Peace of mind for anyone tackling exposed pipework during a retrofit or new-build interior fit-out. Is it the right choice for short 22mm runs and damp-prone locations?
⚡ At a Glance
- • Thermal Performance: Low thermal conductivity across common temperatures, λ = 0.031–0.037 W/mK, with rated use from -165°C* to +110°C
- • Best for: Interior domestic and light commercial 22mm pipe runs needing quick, neat insulation
- • Not ideal for: Exposed outdoor installations without additional mechanical protection or weatherproofing
Flexible, self-seal pipe insulation supplied in 2m lengths for 22mm bore with a 9mm wall. Offers low lambda values and a Euroclass BL - s2, d0 fire classification.
Reduced heat loss – with low thermal conductivity foam
Thermal conductivity is specified as λ = 0.031 W/mK at -20°C rising to 0.037 W/mK at +40°C, so the 9mm wall slows heat transfer across typical operating temperatures. Rated range of -165°C* to +110°C gives defined performance across a wide span of conditions.
Lower surface heat loss helps pipes retain temperature for longer and reduces risk of localised freezing within the stated temperature range.
Faster installation – with self-seal adhesive and pre-cut length
A factory-applied self-seal seam allows the insulation to close around 22mm bore pipework without separate tape or glue, supplied in 2m lengths for runs and easy joins. Thin 9mm wall and pre-formed bore simplify alignment and trimming.
Quick on-site fitting reduces labour time; users report easy cutting and a secure fit that speeds up routine retrofit or repair jobs.
Moisture and corrosion resistance – with high vapour resistance and neutral pH
Permeability is specified as μ ≥10000, indicating very high resistance to water vapour diffusion, while surface pH is neutral (7±0.5) to avoid corrosive interaction with metal pipes. Fire performance is Euroclass BL - s2, d0.
High vapour resistance helps prevent condensation build-up and protects pipework from corrosion risks, while the fire classification reduces smoke and droplet emission in internal situations.
✨ The 4 Key Reasons for K-flex Interior Pipe Insulation
- Self-seal strip - Enables quick seam closure without additional tapes or glues
- Easy to cut foam - Cuts cleanly for precise joins and rapid on-site adjustments
- Euroclass BL-s2,d0 - Limits smoke and flaming droplets for safer internal installations
- High vapour resistance - Prevents inward moisture flow, preserving insulation performance over time
📋 Technical Details at a Glance
- Type: Self-seal interior pipe insulation
- Thickness: 9mm wall
- Bore: 22mm
- Length: 2m per piece
- Temperature range: -165°C* to +110°C (EN 14706)
❓ Frequently Asked Questions
Q: What pipe diameter does it fit?
A: Designed specifically for 22mm bore pipework, supplied as pre-formed sections to fit that diameter.
Q: What temperatures can it withstand?
A: Rated for use from -165°C* up to +110°C according to EN 14706, with thermal conductivity values given across typical temperatures.
Q: Is installation straightforward for DIYers?
A: Self-seal seam and easy-to-cut foam allow neat on-site trimming and joining; user feedback highlights easy cutting and a secure fit.
🏆 Our Verdict
Tradespeople and DIYers insulating short interior 22mm runs will find this product well suited to quick retrofit work. The combination of low thermal conductivity, self-seal seam, high vapour resistance and a BL-s2,d0 fire rating makes it a practical choice for internal pipe protection. Offers solid long-term value through durable performance and straightforward installation.
