Permamine Roofing P-200 Gost 2697-8. The Dimensions Of Pergamin In Rolls Are 1000 Mm Wide. The Total Area Of The Roll Should Be (20 ± 0.5) M2 2. Technical Requirements 2.1. The Exposure Force Of Stretching Should Not Be Less Than 265 N (27 Kgf). 2.2. Pergamine Water Absorption During The Test For (24.0 ± 0.1) H Should Be No More Than 20% In Weight. 2.3. Permamine Should Be Waterproof. When Testing At A Pressure Of At Least 0.001 Mpa (0.01 Kgf/Cm), Signs Of Water Penetration Should Not Appear On The Surface Of The Sample. 2.4. Permamine Should Be Flexible. When Testing On A Beam With Rounding With A Radius (25.0 ± 0.2) Mm At A Temperature Of Not Higher Than 5 ° C, Cracks Should Not Appear On The Surface Of The Sample. 2.5. The Cardboard Base Of Pergamine Should Be Evenly Saturated Along The Entire Thickness Of The Canvas. In The Context Of Pergamin Should Be Black With A Brown Tint, Without Light Layers Of Untreated Cardboard And Without Extraneous Inclusions.
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