A kit for temporarily relieving flood water seep includes a unitized enclosure with segregated containers for a prepolymer and catalyst, respectively. A mixer connected to the unitized enclosure combines the catalyst and prepolymer and a disperser connected to mixer sprays the combined catalyst and prepolymer. The prepolymer and catalyst, in contact with water, forms a pliable solid of density of at least about 7 lb./cu.ft. The kit may be a consumer article, and the polymer can be removable after flooding subsides.