Not a top coat . Just a shower cap. Available in several sizes. http://www.amazon.com/Brooks-BMK002-Saddle-Cover-Medium/product-reviews/B0018PPWV8 I have also used Tandy Leather Super Shene Eco- Flo clear leather finish. Formulated for use with their leather stain. Check with the maker of your leather stain for a compatible sealer.