K-Flex ST Self-Seal Pipe Insulation 13mm Wall
15mm / 13mm
£3.98
Sale price
£3.98
Regular price
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K-Flex ST Self-Seal Pipe Insulation 13mm Wall
- UK stock – fast dispatch
- UK Mainland Delivery £7.50
- Expert technical support
- Trade accounts available
£3.98
Sale price
£3.98
Regular price
Shipping calculated at checkout.
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K-FLEX ST Self-Seal insulation is the fastest way to insulate AC pipework — no adhesive required on the seam, clean finish every time.
- ✔ Self-seal — no adhesive needed on straight runs
- ✔ Class O fire-rated insulation (Euroclass BL-s2, d0)
- ✔ 2m lengths — fast installation on site
Why Use Self-Seal Insulation?
Self-seal insulation reduces installation time and eliminates adhesive on straight runs. This means faster installs, less mess on site, and consistent sealing across every job — especially valuable on larger or multi-unit installations where speed and finish quality matter.
About the 13mm Wall
The 13mm wall thickness is the most widely specified for standard split system AC and domestic HVAC installations. It meets the thermal performance requirements for refrigerant pipework on most residential and light commercial jobs, and is the default choice for HVAC engineers across the UK.
Where This Is Used
- Refrigerant pipework on split system AC installations
- Chilled water and cooling pipework
- Domestic and commercial HVAC systems
- Any application requiring fast, clean pipe insulation
Choosing the Right Wall Thickness
Select pipe bore size to match your copper pipe OD, then choose wall thickness based on your application:
- 9mm — tight spaces and short pipe runs
- 13mm — standard AC installations (most common)
- 19mm — refrigeration and low temperature systems
Key Features
- Self-seal adhesive closure — fast, clean installation without separate adhesive on straight runs
- Closed-cell elastomeric foam — prevents condensation and moisture ingress
- Class O fire rating — Euroclass BL-s2, d0
- Thermal conductivity as low as 0.031 W/(m·K)
- Service temperature range: -40°C to +85°C
- Supplied in 2m lengths
Technical Specifications
| Brand | K-FLEX |
| Product | K-FLEX ST Self-Seal |
| Wall Thickness | 13mm |
| Length | 2m per piece |
| Material | Closed-cell elastomeric foam (NBR/PVC) |
| Fire Rating | Class O (Euroclass BL-s2, d0) |
| Thermal Conductivity (λ) | 0.031 W/(m·K) at 0°C |
| Service Temperature Range | -40°C to +85°C |
| Closure | Self-seal adhesive strip |
| Colour | Black |
| Country of Origin | Italy |
Essential Accessories
- K-FLEX ST Tape — seal joints, fittings and cut ends for a complete insulation system
- K-420 Adhesive — for bends, tees and complex connections where self-seal is not sufficient
Complete Your Installation
- AC Copper Pipe — refrigerant-grade copper pipe for AC systems
- Pipe Supports & Fixings — clips and brackets for securing insulated pipework
- Trunking & Cable Management — for neat routing of pipework and cables
Order K-FLEX ST Self-Seal 13mm pipe insulation today — available from UK stock with fast trade delivery.