What is EPDM?

EPDM is an extremely durable synthetic rubber roofing membrane ethylene propylene diene terpolymer) widely used in low-slope buildings in the United States and worldwide. Its two primary ingredients, ethylene and proylene, are derived from oil and natural gas. EPDM is available in both black and white, and sold in a variety of widths, ranging from 7.5 feet to fifty feet, and in two thicknesses, 45 and 60 mils, EPM can be installed either fully adhered, mechanically attached or ballasted, with the seems of the roofing system sealed with liquid adhesives or specially formulated tape.




Thermoset, designed to be exposed for decades, inert to buried environments


Semi crystaline thermoplastic, susceptible to stress cracking and cracking at extreme thermal ereas

Remains flexible at low temperatures, can be seamed at low temperatures


Must be installed at +4°C due to stiffness. Due to semi crystaline structure, susceptible to low temperatures

Elongation over 500%, conforms easily to uneven surfaces, better friction resistance to sliding


Elongation only 15%, non-conforming, surface friction very low

large sheet for quick installation and fewer seams, no specialised equipment needed


Heat welded with qualified contractor, increased labour

If damaged, easily repaired by owner or contractor


Repairs require specialized equipment with trained technicians

Long life-cycle without repairs or maintenance for 50+ years


Shorter life-cycle with frequent repairs and maintenance undertaken

Better lay flat, puncture resistance, reduced field damage and fewer seams


Rigid, punctures easily , more seams and weld failures common

Features & Benefits of EPDM Water Containment Applications

Benefits of epdm waterproofing material

Characteristics of EPDM

  • Superior resistance to UV, ozone, oxidation and weathering.
  • Long life expectancy. 50+ years of field performance.
  • Superb elongation and lay-flat properties.
  • Extremely flexible, conforms easily to most demanding sub-grades.
  • Quick seaming process. Saves time and labor costs.
  • Easy to install. No heat or welding required.
  • Non-toxic to most fish and plant life.
  • Superior puncture resistance.
  • Low maintenance and easily repairable.
  • Lightweight. At only 1.3kg / m2 EPDM is much lighter than many alternatives.

  • Waterbrothers has a skilled team and offers the highest quality installations with the backup from Carlisle and their industry-leading warranty coverage, providing customers with peace of mind that their investment is protected.

    Waterbrothers offers industry-leading, reliable, economical and environmentally friendly solutions for all your water containment needs. EPDM membrane is long-lasting, durable, dimensionally stable and resistant to punctures, tears and chemicals.

    EPDM Water Containment Uses

  • Decorative commercial water features
  • Agriculture
  • Aquaculture
  • Mining
  • Storm water management
  • Water conservation
  • Irrigation dams, canals and reservoirs.
  • Water Desalination Plants
  • Earth Dug Reservoirs

    Pond Liner Termination – Trench Method

    Earth Dug Reserviors