Problem to be solved: to provide a double-layer coating film, a coating agent set and a coating material capable of compatibility with excellent long-lasting durability of algal (anti fungal) and excellent light resistance.SolutionThe undercoat film contains a coating film forming component capable of forming a coating film and a sealant agent (a mold) having a solubility of 10 mg \/ L or more and 400 mg \/ L or less, and containing an undercoat film and an inorganic coating film disposed on the undercoat film. The proportion of the alginate (antifungal agent) (a) is 0.01 mass parts to 0.5 parts by weight or less with respect to 100 parts by weight of the coating film forming componentThe inorganic coating film contains at least a coating film component containing at least an inorganic compound (b) having no photocatalytic activity and an algal inhibitor (b) having a solubility of water of 0.1 mg \/ L or more and less than 10 mg \/ L (b), and an antifungal agent (antifungal agent) The ratio of (b) is a multilayer coating film of 0.5 mass parts or more to 5 parts by weight or less with respect to 100 parts by weight of the coating film composition.No selection【課題】防藻性(防カビ性)の優れた長期持続性と、優れた耐光性とを両立できる複層塗膜、コーティング剤セット、及び塗装体を提供する。【解決手段】 下地塗膜と、この下地塗膜上に配置された無機塗膜とを含み、前記下地塗膜が、塗膜を形成可能な塗膜形成成分と、水に対する溶解度が10mg/L以上400mg/L以下である防藻剤(防カビ剤)(a)とを含有し、前記防藻剤(防カビ剤)(a)の割合が、前記塗膜形成成分100質量部に対し、0.01質量部以上0.5質量部以下であり、 前記無機塗膜が、光触媒活性を有しない無機化合物(B)を少なくとも含有する塗膜成分と、水に対する溶解度が0.1mg/L以上10mg/L未満である防藻剤(防カビ剤)(b)とを含有し、前記防藻剤(防カビ剤)(b)の割合が、前記塗膜成分100質量部に対し、0.5質量部以上5質量部以下である複層塗膜。【選択図】なし
