A buttress assembly that is configured to temporarily adhere to a wet surgical stapler end effector, the buttress assembly comprising: (a) a buttress body (102, 112); and (b) a humidity tolerant adhesive applied to at least one side of the buttress body, the humidity tolerant adhesive comprising a bioabsorbable polymer having a block configuration selected from the group consisting of: (i) A-B-A, and (ii) A-B-C, wherein the A block is a bioabsorbable homopolymer characterized by a molecular weight of at least 5 kDa, a glass transition temperature of at least 0°C, a crystallinity as measured by X-ray diffraction of at least 30%, and a melting temperature of at least 50°C; and wherein the B block is a bioabsorbable homopolymer or copolymer that is characterized by a glass transition temperature of at least -40°C, a crystallinity as measured by X-ray diffraction of at most 25%, and a molecular weight of from 20 to 80kDa; and wherein the C block is a bioabsorbable hydrophilic homopolymer or co-polymer that is miscible with water at 37°C. (a) a buttress body (102, 112); and (b) a humidity tolerant adhesive applied to at least one side of the buttress body, the humidity tolerant adhesive comprising a bioabsorbable polymer having a block configuration selected from the group consisting of: (i) A-B-A, and (ii) A-B-C, wherein the A block is a bioabsorbable homopolymer characterized by a molecular weight of at least 5 kDa, a glass transition temperature of at least 0°C, a crystallinity as measured by X-ray diffraction of at least 30%, and a melting temperature of at least 50°C; and wherein the B block is a bioabsorbable homopolymer or copolymer that is characterized by a glass transition temperature of at least -40°C, a crystallinity as measured by X-ray diffraction of at most 25%, and a molecular weight of from 20 to 80kDa; and wherein the C block is a bioabsorbable hydrophilic homopolymer or co-polymer that is miscible with water at 37°C. (i) A-B-A, and (ii) A-B-C, wherein the A block is a bioabsorbable homopolymer characterized by a molecular weight of at least 5 kDa, a glass transition temperature of at least 0°C, a crystallinity as measured by X-ray diffraction of at least 30%, and a melting temperature of at least 50°C; and wherein the B block is a bioabsorbable homopolymer or copolymer that is characterized by a glass transition temperature of at least -40°C, a crystallinity as measured by X-ray diffraction of at most 25%, and a molecular weight of from 20 to 80kDa; and wherein the C block is a bioabsorbable hydrophilic homopolymer or co-polymer that is miscible with water at 37°C. wherein the A block is a bioabsorbable homopolymer characterized by a molecular weight of at least 5 kDa, a glass transition temperature of at least 0°C, a crystallinity as measured by X-ray diffraction of at least 30%, and a melting temperature of at least 50°C; and wherein the B block is a bioabsorbable homopolymer or copolymer that is characterized by a glass transition temperature of at least -40°C, a crystallinity as measured by X-ray diffraction of at most 25%, and a molecular weight of from 20 to 80kDa; and wherein the C block is a bioabsorbable hydrophilic homopolymer or co-polymer that is miscible with water at 37°C.