Updated 2026 — EPDM rubber pads in solar mounting isolate dissimilar metals, protect the roof skin and damp vibration — but only if the compound survives decades of UV, ozone and heat. This article publishes Solaracks’ own EPDM test data supporting a service life matched to the 25-year design life of the array.
Solaracks use imported new material from 3M or Keltan for EPDM used in L foot, clamps, mini rails, framless module clamps etc.
To prove it is suitable and convincing it is the best standard of the industry, we have done one test through third-party lab.
Test description：ambient temperature：23℃，relative humidity：50%
The stress relaxation testing was performed according to GB/T 1685-2008 method A.
Estimation of a lifetime by Stress relaxation testing evaluate the test result according to Arrhenius
based on GB/T 20028-2005.
Stress Relaxation
Relaxation/temp.
90celsius degree, 110celsius degree, 130celsius degree, 150celsius degree
15%,h 2796 326 62 13
Arrhenius estimation
According to the procedure in GB/T 20028-2005,the max temperature at 103.7
years was estimated;the maximum temperature 50 celsius degree at 31 years was estimated.
Relaxation,% 15
Estimated Lifetime at 40 celsius degree, years, 103.7
Estimated Lifetime at 50 celsius degree, years, 31
For details, please contact Solaracks team at info@solaracks.com
