10/12/2026
START WITH THE MATERIAL.
When comparing GRI-GM13 and GRI-GM17, begin with the polymer: not a blanket assumption about performance.
• GRI-GM13 is a standard specification for HDPE smooth and textured geomembranes.
• GRI-GM17 is a standard specification for LLDPE smooth and textured geomembranes.
Both specifications establish test properties and testing frequencies for manufacturing quality control. They can help establish a material-quality baseline, but they are not laws, codes or universal certifications.
The right selection also depends on:
• Expected movement and deformation
• Chemical exposure
• Subgrade conditions
• Geomembrane thickness
• Surface texture
• Installation requirements
A specification helps frame the conversation. Project conditions help determine the right engineered solution.
Read the full blog on Viaflex.com: https://www.viaflex.com/geomembrane-standards-for-selection/
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-GM13 -GM17