Modern lightweight and multifunctional composites play a key role in sustainable building construction by enabling material-efficient structures and the realization of complex-shaped geometries. This, in turn, requires joining technologies that ensure durable and transparent load transfer while reliably compensating for geometric complexity and manufacturing-related tolerances. Conventional liquid adhesives are often unsuitable for such applications due to limitations in shape control, curing behavior and optical quality. To address these challenges, a new bonding technology was developed. Ethylene-vinyl-acetate (EVA) was selected as base polymer due to its excellent optical clarity, adhesion and aging resistance known from glass lamination. However, its use as a structural adhesive required a new processing concept leading to the development of a two-step extrusion-lamination process with controlled thermal crosslinking. EVA types with vinyl-acetate contents of 28 to 40 % were modified with organic peroxide and systematically characterized regarding extrusion behavior, degree of crosslinking and adhesive performance. In shear strength tests, the optimized formulation achieved up to three times higher adhesive strength than conventional hot melt adhesives. Furthermore, this EVA mixture demonstrated stable adhesion and transparency under heat and UV exposure in aging experiments.