Curable composition

1. A moisture-permeable waterproofing material for a building comprising a cured product obtained by curing a curable composition comprising:

(A) a polyoxyalkylene polymer having a silicon-containing group crosslinkable by forming a siloxane bond which is selected from a group consisting of —CH 2 CH 2 CH 2 —SiCH 3 (OCH 3 ) 2 and —CH 2 CH 2 CH 2 —Si(OCH 3 ) 3 at its terminal;

wherein the polyoxyalkylene polymer is a polyoxypropylene polymer;

(B) a polyoxyalkylene plasticizer whose main chain contains 5 wt % or more of an oxypropylene-derived repeating unit and has one or more groups, at an end thereof, selected from the group consisting of an —OH group, a group represented by the formula (7):

—OR 9

(wherein R 9 is a substituted or unsubstituted C 1-20 hydrocarbon group),

and a group represented by the formula (8):

—NR 10 2

(wherein R 10 is each independently a hydrogen atom, or a substituted or unsubstituted C 1-20 hydrocarbon group),

said curable composition being liquid and being a curable composition wherein the component (B) is a polyoxyalkylene plasticizer (B1) that does not have an —NH 2 group at a molecular chain end, and contains polyoxyalkylene (b1) that has an —OH group at all molecular chain ends, and has a molecular weight of 300 to 1000, and

wherein a ratio (W2/W1) of a total weight (W2) of the component (A) and the component (B1) with respect to a total weight of the curable composition (W1) is 53 to 78 wt %, and

wherein moisture permeability according to ASTM E96 (wet cup method) of said cured product is 0.6 perm·inch or more.

2. The moisture-permeable waterproofing material according to claim 1 ,

wherein the cured product is in a membrane form having a thickness of 0.005 to 0.05 inch.

3. The moisture-permeable waterproofing material according to claim 2 ,

wherein moisture permeability according to ASTM E96 (wet cup method) of said cured product is 0.8 perm·inch or more.

4. A liquid-applied moisture-permeable waterproofing method comprising: applying the cured product according to claim 2 to a building.

5. A liquid-applied moisture-permeable waterproofing method comprising: applying the cured product according to claim 2 to a substrate of an exterior wall of a building.

6. A liquid-applied moisture-permeable waterproofing method comprising: applying the cured product according to claim 2 around an opening of a building.

7. A liquid-applied moisture-permeable waterproofing method comprising: applying the cured product according to claim 2 to a roof of a building.

8. The moisture-permeable waterproofing material according to claim 2 , which is for a substrate of an exterior wall of a building.

9. The moisture-permeable waterproofing material according to claim 2 , which is for areas around an opening of a building.

10. The moisture-permeable waterproofing material according to claim 2 , which is for a roof of a building.

11. The moisture-permeable waterproofing material according to claim 1 wherein moisture permeability according to ASTM E96 (wet cup method) of said cured product is 0.8 perm·inch or more.

12. The moisture-permeable waterproofing material according to claim 1 , which is for a substrate of an exterior wall of a building.

13. The moisture-permeable waterproofing material according to claim 1 , which is for areas around an opening of a building.

14. The moisture-permeable waterproofing material according to claim 1 , which is for a roof of a building.