Kelly's Professional Grade Cork Renew protects, seals and waterproofs any cork surface. The non-toxic formula seals cork bed sandals, and prevents them from cracking and flaking. Dries clear. Comes with easy-to-use brush applicator.
Great for keeping Birkenstocks and other cork products healthy.
How to apply: https://www.youtube.com/watch?v=xSqZglsgXVg