A method for reducing ingress of water into an edge of a light redirecting construction comprising: • providing a light redirecting construction (1700; 1800) having a first major surface and a second major surface opposite the first major surface, and • depositing a sealant on at least a portion of an edge of the light redirecting construction, wherein the light redirecting construction (1700; 1800) comprises: ∘ a light redirecting film comprising a plurality of microstructured prismatic elements (131; 1808), having a first major surface and a second major surface opposite the first major surface ∘ an adhesive layer comprising an adhesive, wherein the adhesive layer has a first major surface and a second major surface opposite the first major surface, ∘ a cover film (121; 1516; 1802) having a first major surface and a second major surface opposite the first major surface, wherein the microstructured prismatic elements penetrate at least partially into the first major surface of the adhesive layer, wherein the second major surface of the adhesive layer is immediately adjacent to the first major surface of the cover film (121; 1516; 1802) wherein the light redirecting construction (1700; 1800) has at least one channel defined by the volume enclosed between the surface of the microstructured prismatic elements (410; 1808) and the adhesive layer wherein the at least one channel extends from at least one edge of the light redirecting construction inwards, characterized in that the sealant is a wax and penetrates in the channel at most 5 mm. • providing a light redirecting construction (1700; 1800) having a first major surface and a second major surface opposite the first major surface, and • depositing a sealant on at least a portion of an edge of the light redirecting construction, wherein the light redirecting construction (1700; 1800) comprises: ∘ a light redirecting film comprising a plurality of microstructured prismatic elements (131; 1808), having a first major surface and a second major surface opposite the first major surface ∘ an adhesive layer comprising an adhesive, wherein the adhesive layer has a first major surface and a second major surface opposite the first major surface, ∘ a cover film (121; 1516; 1802) having a first major surface and a second major surface opposite the first major surface, wherein the microstructured prismatic elements penetrate at least partially into the first major surface of the adhesive layer, wherein the second major surface of the adhesive layer is immediately adjacent to the first major surface of the cover film (121; 1516; 1802) wherein the light redirecting construction (1700; 1800) has at least one channel defined by the volume enclosed between the surface of the microstructured prismatic elements (410; 1808) and the adhesive layer wherein the at least one channel extends from at least one edge of the light redirecting construction inwards, characterized in that the sealant is a wax and penetrates in the channel at most 5 mm. ∘ a light redirecting film comprising a plurality of microstructured prismatic elements (131; 1808), having a first major surface and a second major surface opposite the first major surface ∘ an adhesive layer comprising an adhesive, wherein the adhesive layer has a first major surface and a second major surface opposite the first major surface, ∘ a cover film (121; 1516; 1802) having a first major surface and a second major surface opposite the first major surface, wherein the microstructured prismatic elements penetrate at least partially into the first major surface of the adhesive layer, wherein the second major surface of the adhesive layer is immediately adjacent to the first major surface of the cover film (121; 1516; 1802) wherein the light redirecting construction (1700; 1800) has at least one channel defined by the volume enclosed between the surface of the microstructured prismatic elements (410; 1808) and the adhesive layer wherein the at least one channel extends from at least one edge of the light redirecting construction inwards, characterized in that the sealant is a wax and penetrates in the channel at most 5 mm.