K-Flex K-Rock ALU Mineral Wool Pipe Insulation 25mm Wall
15mm
£5.72
Sale price
£5.72
Regular price
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K-Flex K-Rock ALU Mineral Wool Pipe Insulation 25mm Wall
- UK stock – fast dispatch
- UK Mainland Delivery £7.50
- Expert technical support
- Trade accounts available
£5.72
Sale price
£5.72
Regular price
Shipping calculated at checkout.
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K-Flex K-Rock ALU Mineral Wool Pipe Insulation — 25mm Wall
K-FLEX K-Rock ALU is a pre-formed mineral wool (rock wool) pipe section with an aluminium foil facing, manufactured to the highest European standards. Engineered for high-temperature HVAC, industrial, and building services pipework where elastomeric insulation is unsuitable, K-Rock ALU delivers outstanding thermal performance, fire resistance, and mechanical durability in demanding environments.
The 25mm wall thickness is the mid-range specification, suited to medium-bore pipework in plant rooms, district heating, commercial HVAC, and hot water installations where enhanced thermal performance and fire resistance are required beyond the 20mm option. Available in bore sizes from 15mm to 245mm.
The factory-applied aluminium foil laminate provides a clean, professional finish and acts as a vapour barrier, making K-Rock ALU the preferred specification for plant rooms, district heating, steam lines, and high-temperature process pipework. Seal all joints and longitudinal seams with aluminium foil tape for a complete vapour-tight installation.
Key Features
- Rock mineral wool construction — excellent high-temperature performance
- Aluminium foil (ALU) facing — vapour barrier, professional finish, and UV resistance
- Outstanding fire resistance — Euroclass A1 non-combustible
- Excellent acoustic and thermal insulation properties
- Rigid pre-formed sections for fast, accurate installation
- 25mm wall — 15mm to 245mm bore sizes available
- Supplied per 1 metre section
- CE certified — compliant with EN 14303
Typical Applications
- High-temperature HVAC pipework and plant rooms
- District heating and steam distribution
- Hot water and process pipework
- Industrial installations requiring fire-rated insulation
- Building services where non-combustible insulation is specified
Technical Specifications
| Material | Rock mineral wool |
| Facing | Aluminium foil laminate (ALU) |
| Wall thickness | 25mm |
| Bore sizes available | 15mm to 245mm |
| Temperature range | -200°C to +650°C |
| Thermal conductivity (λ) | 0.033 W/(m·K) at 10°C |
| Reaction to fire | Euroclass A1 — non-combustible (EN 13501-1) |
| Water vapour diffusion resistance (μ) | ≥ 7,000 (ALU facing) |
| Standard | EN 14303 |
| Section length | 1 metre |
| Colour | Silver (ALU faced) |
| Brand | K-FLEX |
Other wall thicknesses: 20mm | 30mm | 40mm | 50mm
⚠️ Additional wall thicknesses available on request: 60mm, 70mm, 80mm, 90mm, 100mm and 120mm. Please contact us at sales@ryanairconspares.com for pricing and availability.