K-Flex Pipe Insulation

K-Flex Pipe Insulation

Shop K-FLEX pipe insulation for HVAC, refrigeration, heating, chilled-water and industrial pipework. This collection is limited to pipe-insulation products rather than the wider K-FLEX accessory, sheet and solar-fitting ranges.

K-FLEX ST Elastomeric Pipe Insulation

K-FLEX ST is flexible closed-cell elastomeric insulation for refrigeration, air-conditioning, heating and chilled-water services. Standard tube and self-seal options are available across a wide range of pipe diameters and insulation thicknesses.

K-FLEX ST/SK Self-Seal

K-FLEX ST/SK uses a factory-applied self-seal closure to speed installation on straight pipe runs. Butt joints, fittings and fabricated sections should still be sealed using the appropriate K-FLEX installation system.

K-FLEX K-ROCK ALU Mineral Wool Pipe Sections

K-FLEX K-ROCK ALU is a pre-formed mineral-wool pipe section with reinforced aluminium facing for higher-temperature building-services and industrial applications. K-FLEX publishes a maximum service temperature of up to +600°C for K-ROCK ALU pipe sections and a reaction-to-fire classification of Euroclass A2L-s1,d0 for the aluminium-faced product. The unfaced K-ROCK version has a different fire classification, so the foil-faced K-ROCK ALU should not be described as A1 non-combustible.

K-FLEX PE Polyethylene Pipe Insulation

K-FLEX PE is lightweight closed-cell polyethylene pipe insulation for appropriate heating and plumbing applications where its service-temperature and fire-performance characteristics suit the specification.

Stock and Lead Times

We hold selected K-FLEX sizes in stock. Other legitimate catalogue sizes may be available to order with additional supplier lead time. Product pages show the relevant stock and lead-time information; where a size is supplied to order, we will confirm the expected dispatch date after the order is received.

Choosing the Correct Size

Select insulation by the actual outside diameter of the pipe and the required insulation thickness. Where a project needs to comply with BS 5422:2023, Building Regulations or a project-specific heat-loss or condensation-control requirement, use the calculated specification thickness rather than assuming every available size is suitable.