Cross-linked polyethylene, commonly called XLPE, is a closed-cell polyolefin foam used in building-services insulation.
Scudoflex XLPE is manufactured as cross-linked closed-cell polyethylene foam with a factory-bonded aluminium-foil facing. It is available in tubes, rolls and sheets.
Why use XLPE insulation rolls?
Roll format is particularly useful when large flat or irregular surfaces need continuous insulation coverage.
Typical applications include:
- HVAC ductwork
- Large equipment
- Chilled-water services
- Refrigeration
- Hot-water systems
- Mechanical services
XLPE insulation roll dimensions
Scudoflex publishes roll dimensions of 1.2 m × 20 m, with thicknesses from 3 mm to 20 mm.
For thicker applications, XLPE sheets are available in 1.2 m × 2.4 m formats from 25 mm to 50 mm.
Moisture resistance
One of the important characteristics of closed-cell insulation is resistance to moisture movement.
Scudoflex XLPE has a published diffusion resistance factor of μ >54,700, together with a water-vapour permeance value of 2.15 × 10⁻¹⁰ g/m²·s·Pa.
This makes moisture control a key part of the product's technical positioning.
XLPE for HVAC systems
HVAC systems can involve both hot and cold services.
Scudoflex XLPE has a published operating range of −80°C to +105°C, while the manufacturer separately specifies an adhesive-associated temperature range.
The applicable range should always be checked against the actual system temperature and installation configuration.
XLPE versus traditional insulation selection
The choice between XLPE and NBR should be based on project requirements rather than material name alone.
Consider:
- Temperature
- Moisture exposure
- Required thickness
- Installation method
- Facing
- Mechanical protection
- Fire-performance requirements
- Available formats
- Project specifications
Scudoflex itself presents NBR and XLPE as two closed-cell insulation technologies designed for different service requirements.
Pakistan supply considerations
For procurement teams in Karachi, Lahore and Islamabad, it is useful to specify the exact roll size, thickness, quantity and facing rather than simply requesting "XLPE insulation."
A technical RFQ should identify:
Material: Cross-linked polyethylene foam Format: Roll / sheet / tube Facing: Factory-bonded aluminium foil Thickness: Project-specific Application: HVAC / duct / chilled water / refrigeration Location: Karachi / Lahore / Islamabad / Rawalpindi
Installation accessories
Scudoflex also provides compatible XLPE tapes and a dedicated XLPE adhesive. The adhesive is described as a one-component foam adhesive developed for bonding XLPE foam and compatible insulation substrates.
Using compatible accessories helps create a more complete insulation system rather than treating the foam alone as the finished installation.