SealEco Butyl Rubber Pond Liners Butyl rubber pond liners have been produced in Sweden by SealEco (formerly Varnamo) since 1967. With a long and successful history, it remains a favourite of garden designers and contractors alike. However, in more recent times, many users have switched to EPDM rubber pond liners such as Elevate PondGard and SealEco Pond Liner. These liners have very similar properties to Butyl pond liners, and in some cases perform even better, but at a reduced cost. This is because the Butyl polymer has significantly increased in cost over the years, making Butyl pond liners less economical, especially for large ponds and lakes. We continue to stock Butyl pond liner because it's still an excellent material for lining ponds. For some of our customers, where price is less sensitive, this is still the best choice. Why Choose Butyl Pond Liners? Highly durable: Butyl is UV stable, flexible, and highly puncture resistant making it a heavy-duty material suitable for all pond applications. Box Welded Liners: Butyl can be manufactured into box liners for ornamental and Koi fish ponds. We do this in our factory by vulcanising the joints to make them super strong. Non-toxic: Butyl pond liners are safe for humans, fish and animals.