Key Findings
Henkel announced on June 17, 2026, that its advanced structural adhesive, Loctite EA 9497, was instrumental in the modular construction of the central towers of the iconic Sagrada Familia in Spain. This technology proved decisive in both significantly accelerating the construction process and guaranteeing the long-term durability of the structure.
Technical Details
Loctite EA 9497 is a high-performance, epoxy-based structural adhesive particularly adept at forming strong bonds between disparate materials. For the central towers of the Sagrada Familia, over 24 tons of this adhesive were utilized to integrate pre-fabricated stone modules with the internal steel framework, enabling them to act as a monolithic structural unit. The adhesive exhibits high shear and peel strengths and, once cured, offers exceptional environmental resistance to factors such as temperature fluctuations, humidity, and UV radiation. This allows for an even distribution of loads, with the stone and steel effectively working as one. The combination of modular construction techniques and high-performance adhesives provided substantial advantages in terms of both construction precision and timeline compared to traditional stone masonry and mortar joining.
Background & Context
The Sagrada Familia, Antoni Gaudí’s unfinished masterpiece, was undergoing a monumental project to complete its central towers, aligning with the centenary of Gaudí’s death. The restoration and completion of historical monuments demand a delicate balance between traditional aesthetics and modern engineering. Modular construction, a contemporary building trend, reduces on-site labor, enhances safety, and improves quality, but often presents challenges in achieving reliable connections between different materials. Henkel’s Loctite EA 9497 addressed this challenge, facilitating the realization of Gaudí’s vision with structural integrity fitting for the 21st century, all while improving time and cost efficiency.
Strategic Significance & Outlook
This successful application at the Sagrada Familia underscores the transformative role that high-performance adhesives can play in the architecture and construction industry, especially for large-scale and complex structures. Adhesive technologies like Loctite EA 9497 offer lighter, aesthetically superior, and more durable alternatives to conventional mechanical fastenings or welding, and are likely to see broader adoption in future construction projects. Building on this achievement, Henkel is poised to further expand the application scope of its adhesive technologies, contributing to the proliferation of sustainable and efficient construction methods. As demand for prefabricated and modular building increases globally, the role of advanced adhesives is expected to become even more critical.
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