If you're sure you have at least version 8, you can try to bypass the detection.
Bonding and Thermobonding
Like all other rigid PVC materials, KÖMATEX can be bonded to itself and to other materials. Depending on the requirements and the specific use, you can use adhesives containing solvents and solvent-free polyurethane adhesives for bonding KÖMATEX to itself or to most other expanded foam PVC products.