One-component type curable composition and one-component type waterproofing material

A one-component type curable composition, comprising:

• an isocyanate group-containing urethane prepolymer (A) obtained by allowing a polyoxyalkylene-based polyol (a-1) having a number average molecular weight of 1,000 or more and less than 3,000, a polyol (a-2) having a number average molecular weight of less than 1,000, a (meth)acrylate (a-3) containing two or more hydroxyl groups in one molecule, and isophorone diisocyanate (a-4) to react with each other, wherein the (meth)acrylate (a-3) is a compound obtained by allowing all the epoxy groups in an epoxy compound containing two or more epoxy groups in one molecule to react with (meth)acrylic acid;
• a compound (B) having an oxazolidine ring;
• a first curing accelerator (C) configured to accelerate a reaction between at least one of a secondary amino group or a hydroxyl group generated by hydrolysis of the compound (B) having an oxazolidine ring and an isocyanate group of the isocyanate group-containing urethane prepolymer (A);
• and
• a second curing accelerator (D) configured to accelerate the hydrolysis of the compound (B) having an oxazolidine ring,
• wherein a cured product obtained by curing the one-component type curable composition with water satisfies the following (I) to (III):
• (I) type D durometer hardness specified under JIS K 6253-3 is D40 or more;
• (II) tensile strength at 23° C. specified under JIS A 6021 is 10 N/mm2 or more;
• and
• (III) accelerated weather resistance specified under JIS K 5658 complies with a first class.