Double-sided self-adhesive vapor barrier

A self-adhesive vapor barrier, comprising:

• at least one carrier film;
• at least one moisture barrier layer;
• a first pressure-sensitive adhesive layer which is resistant to moisture and is present on a side of the self-adhesive vapor barrier facing the surroundings;
• a second pressure-sensitive adhesive layer which is present on a side of the carrier film opposite the first pressure-sensitive adhesive layer;
• a removable covering layer which has been applied to the second pressure-sensitive adhesive layer on a side of the self-adhesive vapor barrier facing the surroundings opposite the carrier film;
• and
• at least one barrier layer that is impermeable to plasticizers,
• wherein the first pressure-sensitive adhesive layer has, after application to a moisture-saturated fibrocement sheet, a peel resistance measured by a method based on DIN EN 1939:2003 of ≥3.0 N/25 mm, and
• wherein the first pressure-sensitive adhesive layer has a peel resistance measured by a method based on DIN EN 1939:2003 of ≥3.0 N/25 mm after accelerated aging on a moisture-saturated fibrocement sheet for 20 days at 50° C. with retention of the moisture content,
• wherein the at least one moisture barrier layer has an sD value, measured in accordance with ASTM E 398-13, of at least 50 m,
• wherein the first pressure-sensitive adhesive layer is resistant to alkaline moisture at a pH of equal to or more than 8.0 and equal to or less than 13.5, and
• wherein the self-adhesive vapor layer is free of a foam carrier layer.