Two-part curable urethane composition

A two-part curable urethane composition comprising a main agent (A) containing a urethane prepolymer (a), and a curing agent (B) containing a polyether polyol (b) having a weight average molecular weight of 8000 or more and an amine catalyst (c), wherein

• the urethane prepolymer (a) is a reaction product of a polyether polyol (a-1) having a weight average molecular weight of 8000 or more and a diisocyanate (a-2),
• at least one of the main agent (A) and the curing agent (B) contains a carbon black (d), and a total content of the carbon black (d) is 10 to 40 mass % relative to the total amount of the main agent (A) and the curing agent (B), and
• at least one of the main agent (A) and the curing agent (B) contains a silane coupling agent (e), and a total content of the silane coupling agent (e) is 0.3 to 5.0 mass % relative to the total amount of the main agent (A) and the curing agent (B).