How to Choose the Right Tarpaulin GSM

GSM (grams per square metre) measures the weight of fabric per unit area. A higher GSM generally means a thicker, tougher, longer-lasting tarpaulin — but also a heavier and costlier one.

For short seasonal covers (one monsoon on a paddy heap), 90–120 GSM HDPE is enough. For truck tarps that face abrasion daily, insist on 440 GSM+ PVC-coated fabric. For welding curtains and factory partitions where fire safety is mandatory, 580–900 GSM FR PVC is the standard.

Always ask the supplier for a batch COA (Certificate of Analysis). The declared GSM should be within ±5% on measurement — anything looser is a warning sign.

A rule of thumb across Indian conditions: pick the GSM your application demands, then add one grade higher if the tarp will see coastal salt, industrial fumes, or continuous sun above 40 °C.