Even if paste washing is insufficient, paste remaining on the tile after several months to several years is altered, whitened, discoloration, stain adhesion, And can prevent problems such as mold growth from occurring by using an adhesive for a front cover-stuck tile unit. An adhesive used for a tile unit in which the surface sides of a plurality of tile groups arranged side by side with a predetermined joint width are bonded and dried with unit paper and connected, wherein ethylene vinyl acetate resin emulsion or urea or both of them are blended as an auxiliary component with starch paste as a main component. Figure 1

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