Material photos • click to enlarge
Important information
A quality certificate for the material is available for customers on request. To issue the certificate, please specify the batch number as shown on the roll or sheet label.
On request we can also provide:
- certificates and declarations;
- accompanying shipping and product documentation;
- statements on the regulatory status of the product (e.g. exemption from mandatory certification, where applicable).
Technical specifications (TU) are provided only for products purchased from our company.
The material has previously been manufactured under earlier revisions of the same technical specification. Archived documentation can be supplied on request if needed.
Warmlex – non-crosslinked PE foam (NPE)
Versatile packaging and insulation material for construction, logistics and industrial applications
Warmlex is a closed-cell polyethylene foam produced by extrusion from low-density polyethylene (LDPE) with process additives. The material is lightweight, resilient and offers good thermal insulation. It is used in construction, transport, logistics, packaging and related industrial applications. Manufactured in accordance with technical specification TU 22.21.41-047-00203476-2019.
Density 18–45 kg/m³
Temperature range –60…+80 °C
Non-toxic, resistant to oils and petrol
Thickness 1–50 mm
Water absorption ≤ 2%
Colours: white, grey, black.
Warmlex (NPE, non-crosslinked PE foam) – standard rolls and mats
Non-crosslinked polyethylene foam Warmlex (NPE). Standard colour – white. Roll thicknesses 2–10 mm, standard roll format 1.05×50 m (≈ 52.5 m² per roll). Mats in thicknesses 15–100 mm with a standard size of 1.0×2.0 m. Supplied as full rolls and full mats only.
Rolls 2–10 mm
Mats 15–100 mm
ISO 9001:2015
Quality management
Official distributor
Direct deliveries
Availability
Standard production item, regular availability
Shipping & delivery
Export deliveries across Europe
Marking example
Warmlex 20 G LM 1,0×2,0
Warmlex – trade name of non-crosslinked polyethylene foam (NPE).
20 – material thickness 20 mm.
G – colour grey (W – white, D – black).
LM – lamination with film (metalised or polymer film).
1,0×2,0 – sheet size width×length in metres.
For rolls, the format indicates width×length, for example: Warmlex 03 W 1,0×100.
Technical specification TU 22.21.41-047-00203476-2019
Designations and abbreviations
- Thickness
- 01–50 mm (in the marking written as a two-digit number: 02, 03, 04, 10, etc.).
- Colour
- W – white, G – grey, D – black (other colours on request).
- Lamination
-
LM – film lamination;
2LM – film lamination on both sides;
LA – aluminium foil lamination;
2LA – aluminium foil on both sides. - Format
- Sheet: a×b (m), e.g. 1,05×2;
Roll: width×length (m), e.g. 1,0×100. - Sheet example
- Warmlex 30 W 1,0×2 – sheet 30 mm, white, 1,0×2 m.
- Roll example
- Warmlex 03 D 1,2×200 – roll 3 mm, black, width 1,2 m, length 200 m.
Main parameters
| Key properties | |
|---|---|
| Service temperature range | −60…+80 °C |
| Material type | Non-crosslinked PE foam (NPE), closed-cell structure |
| Water absorption (24 h) | ≤ 2 % (according to TU for Warmlex 02) |
| Tensile strength | 0.30 / 0.20 MPa (MD / CD) |
| Elongation at break | ≥ 90 % / ≥ 90 % |
| Colours | white, grey, black (other colours on request) |
| Laminations | LM, 2LM, LA, 2LA (film or aluminium foil) |
Dimensions and tolerances
| Geometry | |
|---|---|
| Thickness | 1–50 mm |
| Formats |
• Sheets: typically 1.0×2.0 m (and other sizes on request)
• Rolls: width 1.0 / 1.05 / 1.2 m, length up to 300–500 m
|
| Tolerances | |
| Thickness | 1.0–4.0 mm: ±0.5 mm; 4.5–50 mm: ±12 % |
| Width | Sheets: ±1 %; Rolls: −1 % / +2.5 % |
| Roll diameter | typical ≈ 0.8 m, max. ≈ 1.2 m |
Packaging and labelling
- Rolls are wound onto cardboard cores with an inner diameter of Ø77 mm (wall thickness ≥ 1 mm); the roll end is fixed with tape or string (in accordance with GOST 17308).
- Sheets are stacked into packs up to 400 mm high and wrapped in polyethylene film.
- Label (on roll/pack) includes: manufacturer and trademark product name and colour batch number and production date dimensions: thickness × width × length quantity: m² or pcs. technical specification (TU) reference quality control stamp handling symbols (e.g. “keep away from sunlight”, “do not use hooks”) information on certificates/declarations
Based on technical specification TU 22.21.41-047-00203476-2019 (Warmlex).
Manufacturer’s warranty
- The guaranteed shelf life of the material is 12 months from the date of manufacture, provided that the specified storage conditions are observed.
- The material retains its properties throughout the entire service life when used correctly.
Storage conditions
- Store in covered warehouse areas, protected from direct sunlight and moisture.
- Recommended storage temperature range: from −25 °C to +40 °C.
- Do not place the material closer than 1 m to heating devices.
- Store rolls in a horizontal position; stack height not more than 2 m.
- Store sheets on pallets or in stacks up to 400 mm high.
Based on technical specification TU 22.21.41-047-00203476-2019 (Warmlex).
Applications of Warmlex (NPE foam rolls)
Flooring underlays, pads, packaging, HVAC, pipe insulation and more.
Where Warmlex rolls are used and which thickness to choose
Non-crosslinked polyethylene foam in rolls 1–10 mm (width 1.05 / 1.3 / 1.6 m). For thicknesses >10 mm use the mat version.
| Application | Recommended thickness | Notes |
|---|---|---|
| Underlay for laminate / engineered wood flooring | 2–3 mm | Impact sound reduction and cushioning. Requires an even subfloor; tape the joints. |
| Underlay for low-temperature underfloor heating | 2–5 mm | For low-temperature systems. Foil-faced Warmlex is often used; follow the heating system design guidelines. |
| Interlayer pads / protective packaging | 1–5 mm | Separation of layers, protection against scratches and light impacts. Can be slit into sheets or tapes. |
| Sealing tapes / anti-squeak solutions | 1–3 mm | Self-adhesive grades are convenient for assembly; damping of joints and panel interfaces. |
| Acoustic underlay (floating floor) | 3–5 mm | Reduction of impact sound; tape all joints to avoid acoustic bridges. |
| Ducts (HVAC), panels | 5–10 mm | Thermal and vapour insulation, often with foil. Seal all joints with aluminium tape. |
| Pipe insulation (spiral wrapping) | 5–10 mm | Spiral wrapping in 1–2 layers; consider pipe diameter and service conditions. |
| Construction underlays / separation layers | 3–8 mm | Compensation of minor unevenness, separation of materials, moisture-resistant layer. |
Warmlex rolls: typical thickness range 1–10 mm, widths 1.05 / 1.3 / 1.6 m, service temperature around −60…+80 °C.
Objective: reduce footfall noise in corridors. Solution – Warmlex 3 mm underlay with taped joints. Result – quieter circulation areas and fast installation.
Rectangular ducts wrapped with Warmlex 8 mm (foil-faced). Reduced heat loss and a neat appearance; joints sealed with aluminium tape.
Rolls slit into 2 mm tapes with acrylic adhesive. Eliminated parasitic squeaks between panels and reduced assembly time.
Need help selecting the right thickness or grade? We will recommend a solution for your application.
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