Water vapour transmission rate: An indication which determines the waterproof qualities of packaging paper.

透湿度：鉴定包装纸的防水性能的质量指标。

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Application: apply to various bibulous rate high granite, marble, sandstone, limestone materials waterproof.

适用范围：适用于各种吸水率较高的花岗岩、大理石、砂岩、石灰石等材料防水。

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But this kind of heat preservation material bibulous rate than other materials high, when using, must do the waterproof layer and crack.

但此种保温材料吸水率较其他材料高，使用时必须加做抗裂防水层。

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The result is a material that is not only waterproof but is able to block out UV radiation from the sun to such an extent that it would rate a Ultraviolet Protection Factor (UPF) of 101.15 if the chart went that high.

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