PURPOSE: To obtain an elastic adhesive, containing a modified polysulfide polymer, a curing catalyst and a plasticizer in a specific proportion, excellent in elasticity, properties of preventing slippage of adherents in application, coating operation efficiency, etc., without causing any seasonal variation in polymerizing and curing and useful for bonding building materials, etc.

CONSTITUTION: This elastic adhesive contains (A) 100 pts.wt. modified polysulfide polymer of formula I [R1 to R4 are each a bivalent organic group; (n) is >0], (B) 0.01-10 pts.wt. curing catalyst such as a compound of formula II [R5 and R6 are each H or a 1-18C hydrocarbon group; M1 is a group VIIb or VIII metal of the periodic table; (x) is 1-4], (C) 30-120 pts.wt. plasticizer and (D) a filler.