What are the temperature limits and UV restrictions for storing and using Isolon, Warmlex and Isolontape?

Short answer: Isolon, Warmlex and Isolontape tolerate a wide temperature range from –60 °C to +40 °C during long-term storage. Short-term transport can reach –50 °C to +50 °C. UV protection is essential — the materials should not be stored under direct sunlight.

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This article summarises officially recommended temperature limits for foam insulation materials and explains how UV exposure affects long-term stability. It is relevant for EU buyers, logistics teams and installers working with IXPE/EPE foams and self-adhesive tapes.

Temperature limits for storage and transport

According to technical specifications, insulation materials Isolon 300/500 (IXPE), Warmlex (non-crosslinked EPE) and Isolontape can safely withstand a wide temperature range:

• Long-term storage: –60 °C to +40 °C;
• Short-term transport: –50 °C to +50 °C;
• Operational temperature (typical): depends on application but usually within –60 °C to +80 °C for foams and up to +60 °C for adhesives.

The materials do not degrade from freezing. The main requirement is to allow the rolls to stabilise at room temperature (12–24 hours) before installation to ensure correct elasticity and dimension stability.

UV exposure and light protection

Isolon, Warmlex and Isolontape are not designed for prolonged direct UV exposure. Continuous sunlight can cause:

• surface yellowing or fading;
• loss of elasticity in open areas;
• accelerated ageing of adhesives in tapes;
• degradation of open-cell microstructure.

For this reason:

• do not store rolls outdoors or under transparent roofing;
• avoid open trucks or trailers without proper covering;
• protect pallets with non-transparent film if daylight cannot be avoided.

Handling before installation

Before using the material, follow these steps:

— allow rolls or sheets to acclimatise at room temperature (typically 20–24 hours);
— check that surfaces are fully dry and free from condensation;
— avoid installation if the rolls were exposed to sunlight or overheating during transport;
— clean mounting surfaces carefully for adhesive-backed products.

For detailed temperature limits for storage, transport and operation — including winter and summer guidance and UV restrictions — please see the separate FAQ:

Temperature limits & UV exposure →

Frequently asked questions

• Can I store the material in an unheated warehouse? Yes. Freezing does not damage IXPE/EPE foams. Just allow time for conditioning before installation.
• Can short sunlight exposure during loading damage the material? Short-term exposure is acceptable. Problems occur only with continuous UV contact during long storage.