The products developed by HANSI are based on acrylate monomers. When irradiated with UV light, these 1K adhesives harden by radical polymerization to solid polymers. The radical crosslinking will stop once exposure to light is stopped. It must be ensured that light is available until complete crosslinking. Therefore at least one part must be permeable or sufficiently transparent to the light used. Light from the visible area with wavelengths around 400 nm also leads to a reaction, which is why the products must be protected from light.