Life Expectancy of Skidmark Rubber Lining

Factors that determine durability / life expectancy

  • U/V and Ozone resistance
  • Resistance to extreme temperature change (Shrinkage and expansion)
  • Ability to conform to changes and settlement of earth over time
  • Abrasion resistance caused by moving bed load
  • Tolerant of animal and human foot traffic that may occur
  • The effect of all of the above on the field splice

Skidmark Geomembrane passed an accelerated aging test by Akron Rubber Development Laboratories.

Description of Test - Material that passed the test would be expected to last at least 20 years in Arizona climate. A pass/fail test, not a prediction of life.

Also - the two dominate polymers of Skidmark Geomembrane have greater than 27 and 35 years life expectancy in ongoing testing at the Geosynthetic Institute. For additional reading see GRI White Paper #6.

Skidmark Rubber does not shrink or expand. There is no stress on the liner or the splices due to extreme temperatures.

Skidmark Rubber has excellent ductility/elongation and can mold itself to irregular sub-grades and adjust to movement of the earth over time.

HEAVY and RUBBER are two words rarely found in the description of geomembrane lining materials. Most will be thermopastic and often with fiber or filament reinforcement to reduce weight and increase strength. The result is a thin, lightweight, strong material with very little ductility/elongation.

Skidmark Geomembrane is heavy in two ways, (1) it is 1/10" (.100") thick and (2) the specific gravity is 1.2. Most thermoplastics will have a s.g. of 1.0 or less.

The photo below shows an early installation of Skidmark Rubber liner that has been in service for seven seasons in a climate where summer temperatures are often over 100 degrees F and winter temperatures can be in single numbers. There is no evidence of the liner cracking or becoming hard and the splices are unchanged.

For all of these reasons, a Skidmark Geomembrane liner installation can confidently be amortized over at least 25 years.

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