Why Polyurea Liners Work Best For My Koi Pond

Polyurea, a high-performance, sprayed plural component elastomer, exhibits excellent physical properties. Polyurea is made from amine-terminated polyethers, amine chains extenders, prepolymers, and other amine-terminated resins. Polyurea is a monolithic, flexible, resilient, tough membrane that resists chemical and water damage.

Polyurea is known for its long-lasting service life. The Bechtel Corporation has conducted independent tests that indicate that polyurea can last at least 75 year.

To avoid an environmental catastrophe, a polyurea water containment facility is currently being constructed at the Hanford Nuclear Reservation Tank Farm. There are approximately 172 nuclear waste storage tanks on the tank farm that hold more than 50,000,000 gallons of radioactive waste materials. The most important water containment projects around the globe are being completed using polyurea.

Polyurea is far more resistant to puncture and impact than EPDM liners. Refer to the military tests and implementation of Polyurea for blast mitigation.

Polyurea has 700% elongation, which allows for ground movements such as swelling, subsidence, and seismic activity. It can be combined with geotextile fabric and applied to support structures. This adds strength and ties the entire surface together.
Concrete is notorious for its negative effects, which this elongation capacity effectively reduces.

Polyurea is a seamless waterproofing barrier that prevents leaching from support structures like concrete and chemically treated wood. Below are thumbnails.

In situ construction of polyurea, liners create a continuous molecular chain. Monocoque construction is used when a Polyurea liner has been completed. The seamless construction seals water away from submerged structures like docks, islands, and pillars thanks to Polyurea's low rate of permeability. These structures won't be affected by water over time. This protection means that long-term maintenance will be less or not at all.

EPDM liners need to be cut and sewn around certain shapes and underwater structures. The long-term water tightness of EPDM liners is compromised by this cutting and seaming. However, the life expectancy of the liner depends on the strength of the glue bond at each seam. Polyurea can be used in seamless applications.

Permanently attaching beach sand can be done. For a natural sand look, sand and gravel can be incorporated into the polyurea right after curing.

Because the Polyurea liner can be applied to geotextile fabric, the floor of the project may be laid with no concrete. These liners were laboratory tested and found to have a tensile strength of 2500 psi.

Concrete naturally leaches into water, increasing pH & alkalinity over time. This must be addressed in live water systems to ensure water quality standards and health. Polyurea isolates cement by creating an impermeable, inert membrane.