Greenseal™ is produced in Sweden by our Butyl supplier, Trelleborg, who over the last 35 years have produced in excess of 45 million square metres of Geomembrane for world wide distribution. Greenseal, an EPDM liner of exceptional quality, is produced in 1.7m wide strips the same as Butyl, it has the same physical characteristics as Butyl with a cost saving of about 30%. EPDM is not affected by UV light; it remains stable with advancing years regardless of temperatures from -40C to +120C without shrinkage, melting, brittleness or cracking. Used extensively by landscapers and civil engineers for lakes, canals, tank liners and reservoirs, its sheer durability and flexibility makes it the perfect choice for any landscape project. Our unique prefabrication hot bond seam welding process, coupled with our in-house designed and patented vulcanising presses, allow us to manufacture single sheet liners up to 1800m˛ (40m x 45m) in our factories. The same process is used on-site to join multiple large sheets for reservoirs and lagoons. 
What does EPDM mean? EPDM (Ethylene-Propylene-Diene-Monomer) is a rubber liner possessing unique properties that have been proven over many years. The unique molecular structure of EPDM means ageing or changes in characteristics is negligible despite decades of exposure to the environment, UV radiation and ozone. Vulcanisation during the manufacturing process means that the material differs from thermoplastic membranes in that its properties are not affected by major temperature fluctuations. The liners remain highly flexible even at very low temperatures (down to -40°C) enabling year round installation in a variety of climates and terrain. TO CALCULATE THE LINER SIZE REQUIRED ADD TWICE THE DEEPEST POINT TO THE LENGTH AND WIDTH AND ADD HALF A METRE FOR TUCKING THE LINER INTO THE SURROUNDING GROUND (FOR EXAMPLE A POND MEASURING 4mx3m AND HALF A METRE DEEP WOULD BE WORKED OUT THUS 4+1+.5 x 3+1+.5 = LINER SIZE OF 5.5m X 4.5m TO ORDER A SIZE NOT LISTED SELECT THE 1m x 1m THEN ENTER THE NUMBER OF SQ METRES REQUIRED AND ON THE CHECKOUT NOTES STATE SIZE REQUIRED IF YOU WOULD LIKE HELP IN CALCULATING YOUR LINER PLEASE GIVE US A CALL ON (01527) 879207 ALL LINERS ARE MADE TO ORDER AND DELIVERY TAKES 5-10 DAYS DEPENDING ON THE SEASONAL DEMAND (SO PLEASE ORDER BEFORE YOU START YOUR PROJECT !!!) MIDLAND WATERLIFE RECOMMENDS PUTTING UNDERLAY UNDER ALL POND LINERS TO PROTECT THE LINER FROM SHARP STONES IN THE GROUND DON'T FORGET TO ORDER UNDERLAY | 
