Based on this product's specifications, here are some alternatives and similar models
Gloss Varnish for Polymer Clay Cernit 30 ml – Cernit CE3050030003
Summary description:
Cernit gloss varnish for polymer clay in a 30 ml bottle. Designed to provide a clear, shiny protective finish for cured polymer clay pieces, the varnish enhances color depth and surface sheen while protecting from minor scratches and moisture. Suitable for small crafts, jewelry, figurines and decorative elements made from polymer clay.