LLDPE versus HDPE for liner design
Linear low-density polyethylene (LLDPE) geomembrane offers higher elongation and conformity on uneven subgrades compared with HDPE. Petroseal supplies LLDPE for farm ponds, irrigation reservoirs, and temporary impoundments where minor settlement and ground movement are expected—while HDPE remains the default on engineered dam and canal liners with strict weld QA.
Choosing the wrong polymer leads to either excessive stress in corners (HDPE on a wavy pond bottom) or insufficient chemical and UV margin (LLDPE on a large exposed canal without design justification).
Typical thickness and build-up
| Thickness | Application |
|---|---|
| 0.5 mm | Light-duty covers, short-term use |
| 0.75 mm | Farm ponds, irrigation channels |
| 1.0 mm | Heavier agricultural or industrial ponds |
Use geotextile cushion on rocky or stony subgrades—the same puncture logic as HDPE applies. Overlap and weld or seam method per applicator equipment and project detail.
Agricultural use in Pakistan
Irrigation districts and on-farm storage benefit from faster, lower-cost liner deployment than cast-in-place concrete when slopes are moderate and water quality is compatible with polyethylene. Protect the liner from livestock damage and mechanical equipment with cover soil or fence lines where needed.
Ordering and support
Petroseal provides LLDPE, HDPE geomembrane, and geotextile from one technical desk. Share pond dimensions, subgrade photos, and retention period for a thickness recommendation. 0321 8489737 · petrosealenterprises.com