When purchasing tarps, a lot of consumers are perplexed by the GSM rating. Grams per square meter or GSM is a significant factor in the tarp’s functionality. It has an impact on the material’s durability, strength and weight. Choosing the appropriate GSM guarantees that you will receive a tarp that meets your needs be they industrial, residential, agricultural or storage. You can make an informed decision with the aid of this tarpaulin GSM guide.
What is GSM in Tarpaulin?
GSM means grams per square meter. It tells you how thick and heavy the tarpaulin is. The higher the GSM number, the thicker and stronger the tarp will be. For example, a 300 GSM tarp is thicker than a 100 GSM tarp. GSM helps buyers compare tarps by weight and density. It is a simple way to know how much material is packed into each square meter of the tarp. Higher GSM means better strength, while lower GSM is lighter and easier to carry. But that also means it may not last long in bad weather.
Why GSM Matters When Choosing a Tarpaulin
GSM affects how the tarp will perform in real-world use. A low-GSM tarp may be enough for indoor work or short-term use, but it won’t hold up in rough weather. It may tear if there’s heavy rain, strong wind, or constant sun.
High-GSM tarps last longer. They’re stronger, heavier, and more reliable. If you need a tarp that stays in place during storms or protects heavy items, go for high GSM. But remember, they’re also heavier, cost more, and can be harder to handle.
So when picking the best GSM for tarpaulin, balance how much protection you need with how easy it is to use and store.
GSM Range Guide: What to Use and Where
70–100 GSM: For Light Temporary Use
This range is good for short-term needs. You can use it to cover items indoors or for temporary shade in dry weather. It’s lightweight and easy to carry, but not made for outdoor use during rain or strong winds. Not suitable as tarpaulin thickness for rain or farming.
120–150 GSM: Medium Duty Use
Works well for garden covers, basic roof protection or short-term vehicle covers. This range offers better strength while still being manageable. Good for backyard use, covering bikes or tools, or small construction sites in dry weather.
200–250 GSM: Heavy-Duty Tarpaulin
This is strong enough for most outdoor uses. Farmers use this range for crop and equipment protection. Warehouses use it to cover stock. It handles medium rain and moderate wind. It is also used for temporary roofing. A good balance between durability and ease of use.
300+ GSM: Industrial and Monsoon-Grade Protection
This is the best choice for tough outdoor conditions. Great for trucks, long-term storage, construction areas, and monsoon weather. If you’re looking for strong tarpaulin thickness for rain or industrial use, go for 300 GSM or higher. It offers top waterproofing and long life.
Factors to Consider Besides GSM
GSM is important, but it’s not the only thing to look for. Other features can improve performance and life of the tarp.
UV Coating
If the tarp will stay in the sun, UV protection is a must. UV rays weaken the material and fade the color. A UV-coated tarp lasts longer and protects what’s underneath from sunlight damage.
Reinforced Edges and Eyelets
Edges tear first. Reinforced edges and strong eyelets keep the tarp from ripping during heavy use. They also make it easier to tie the tarp down securely.
Waterproof vs Water-Resistant
Not all tarps are fully waterproof. Some only resist water for a short time. If you need real protection from heavy rain, always choose a waterproof tarp. This is key if you’re using it for farming or storing goods outdoors.
Anti-Fungal or Anti-Mildew Coating
In wet areas, tarps can develop mold or mildew. This makes them smell bad and weakens the fabric. An anti-fungal coating keeps the tarp clean and helps it last longer.
Type of Material
- HDPE (High-Density Polyethylene): Strong, light, and cost-effective. Good for daily use.
- PVC (Polyvinyl Chloride): Heavy and tough. Offers top waterproofing and long-term use in rough weather. Best for trucks and industry.
- Canvas: Breathable and natural. Good for tools or items that need airflow. May be treated to resist water.
When picking a tarp, combine GSM with these features. A 300 GSM tarp without UV or waterproof coating might not be good in strong sun or heavy rain. Look at the full picture.
Conclusion: Match GSM to Purpose, Not Just Price
Choosing the right tarp is not just about price or the thickest option. It’s about matching the tarp to your actual use. A low-GSM tarp is fine for short-term shade. A high-GSM tarp is better for rain, farming, or industrial jobs.
The best GSM for tarpaulin depends on your need. Use this guide to find the right one — whether for light garden work or heavy-duty storage.