| abstract |
An object of the present invention is to provide a sealed structure capable of sealing the inside of a pipe structure having various sizes and shapes by a simple method and maintaining a sealed state thereafter for a long period of time. A sealing method is provided. A sealant composition comprising a polyoxyalkylene polyol resin, an organic polyisocyanate resin, a foaming agent, and a rust inhibitor is injected downward from a top opening of a pipe structure toward a pipe, and foamed. And a sealant composition comprising a polyol component comprising a polyoxyalkylene polyol resin, a foaming agent and a rust inhibitor, and an organic polyisocyanate resin component. The above method for sealing the inside of a pipe structure. [Selection diagram] None |