ISO 20394:2007规定了用于确定产品从-20°C干燥条件到+20°C潮湿条件（水）连续循环对产品机械性能和含水量影响的设备和程序。适用于隔热产品。 该方法旨在模拟经常暴露在水和低温条件下的隔热产品的冻融效应，例如倒置屋顶和无保护的地面隔热。 不建议对所有隔热产品采用该测试方法。如果本国际标准适用于特定产品，则通常会从产品标准中明确。

ISO 20394:2007 specifies the equipment and procedures for determining the effect, on the mechanical properties and moisture content of a product, of the successive cycling of the product from dry conditions at -20 °C to wet conditions (water) at +20 °C. It is applicable to thermal-insulation products. The method is intended to simulate freeze-thaw effects on thermal-insulation products which are frequently exposed to water and low-temperature conditions, e.g. inverted roofs and unprotected ground insulation. This test method is not recommended for all thermal-insulation products. It will normally be clear from the product standard, if this International Standard is applicable to a particular product.