Fusion SEP - Self-Etch Primer is designed for rigid surfaces that do not flex much. Fusion FPP - Flexible Plastics Primer is designed for surfaces that are not so rigid and do flex.
Fusion FPP - Flexible Plastics Primer Product Link 👉 https://www.kbs-coatings.com/fusion-flexible-plastics-primer
Please check out the Fusion FPP - Flexible Plastics Primer Directions and let us know if you have any additional questions.