Insulating element, comprising: at least one essentially rectangular insulating body having a first outer deck surface and a second inner deck surface, which are essentially parallel to each other and are connected to each other via an upper, a lower and two lateral transversal surfaces (42, 42'), wherein the first outer deck surface is directed away from a component to be isolated in the assembled state and the second inner deck surface is oriented towards the component to be insulated in the assembled state, and wherein the insulating element is covered with at least one coherent layer of cured adhesive at least in the area of its edges and corners, characterized by at least one upper anchor element arranged in the area of the upper transversal surface of the insulating element, wherein the anchor element has a first arm parallel to the outer transversal surface and fixed to the insulating body. wherein the anchor element has at least one mounting device (9, 9') at sides of the inner transversal surface for the connection with the component to be insulated, wherein the upper anchor element has further at least one upper retaining bar (7, 7') running upwards and orthogonal to the first arm, and wherein either the at least one upper retaining bar (7, 7') is in the area of the outer deck surface of the insulating element or the at least one upper retaining bar (7, 7') is in the central part of the upper transversal surface and is configured to interact with a snap-in locking device directed away from the lower transversal surface of an insulating element arranged above and parallel to the transversal surfaces (3, 8). at least one essentially rectangular insulating body having a first outer deck surface and a second inner deck surface, which are essentially parallel to each other and are connected to each other via an upper, a lower and two lateral transversal surfaces (42, 42'), wherein the first outer deck surface is directed away from a component to be isolated in the assembled state and the second inner deck surface is oriented towards the component to be insulated in the assembled state, and wherein the insulating element is covered with at least one coherent layer of cured adhesive at least in the area of its edges and corners, characterized by at least one upper anchor element arranged in the area of the upper transversal surface of the insulating element, wherein the anchor element has a first arm parallel to the outer transversal surface and fixed to the insulating body. wherein the anchor element has at least one mounting device (9, 9') at sides of the inner transversal surface for the connection with the component to be insulated, wherein the upper anchor element has further at least one upper retaining bar (7, 7') running upwards and orthogonal to the first arm, and wherein either the at least one upper retaining bar (7, 7') is in the area of the outer deck surface of the insulating element or the at least one upper retaining bar (7, 7') is in the central part of the upper transversal surface and is configured to interact with a snap-in locking device directed away from the lower transversal surface of an insulating element arranged above and parallel to the transversal surfaces (3, 8).