Tensile strength tells you how a tarp carries a distributed pulling load. Tear strength tells you whether a cut, puncture or damaged edge will keep spreading. Reliable tarpaulin selection requires both values—and the test method behind each number.
Resistance to being pulled apart across an intact strip of tarpaulin.
Resistance to the growth of a pre-cut, nick, puncture or edge tear.
Both properties describe mechanical durability, but they answer different procurement questions. Treating them as interchangeable can lead to a tarp that looks strong on paper yet fails at a corner, grommet, seam or small puncture.
Tarpaulin tensile strength—often shown as breaking strength—is the maximum pulling force an intact coated-fabric specimen can withstand before rupture. It describes the load-bearing capacity of the polyester scrim when force is distributed across the material.
Tarpaulin tear strength measures the force needed to initiate or continue a tear under a defined test method. It focuses on localized damage and the ability of yarns, coating and fabric construction to resist crack propagation.
Use tensile strength to judge how an undamaged tarp carries load. Use tear strength to judge how it behaves after damage begins. Then check abrasion resistance, coating adhesion, seam strength and edge reinforcement because field failure often involves several mechanisms at once.
A useful comparison must keep the specimen direction, unit, test method and conditioning consistent. Numbers from different methods should not be ranked as though they were equivalent.
| Comparison Point | Tensile Strength | Tear Strength | Buyer Interpretation |
|---|---|---|---|
| What is stressed? | An intact strip or grabbed area of fabric | A notched, cut or specially shaped specimen | The tests reproduce different failure conditions. |
| Main question | How much pulling load can the fabric carry before breaking? | How much force is needed to start or continue a tear? | Specify both when a tarp will be tensioned and exposed to damage. |
| Common reporting | Often N/5 cm or another force-per-width format | Often N, depending on the selected tear method | Never compare figures without confirming the unit and specimen geometry. |
| Material drivers | Yarn tenacity, denier, weave density, direction and coating integration | Yarn mobility, yarn strength, weave, coating adhesion and damage geometry | A denser weave may improve load distribution but does not guarantee the same increase in tear propagation resistance. |
| Typical failure location | Across the fabric, seam or a heavily loaded span | At cuts, punctures, edges, corners and attachment points | Finished-cover design can be as important as the base fabric. |
| Direction | Warp/longitudinal and weft/transverse | Warp/longitudinal and weft/transverse | Ask for both directions because woven tarpaulin is not always mechanically identical in each direction. |
A strength value is meaningful only when the supplier states how it was obtained. Coated-fabric standards use different specimen shapes and loading procedures, so the method must travel with the number.
Procurement teams can eliminate most specification confusion by checking the test basis before negotiating price, GSM or delivery.
Confirm the exact ISO, ASTM, DIN or customer-specific method rather than accepting “tested” as sufficient.
Request both machine/longitudinal and cross/transverse directions for a woven tarp.
Distinguish N from N/5 cm, N/mm and other formats. A number without its unit cannot be compared reliably.
For outdoor projects, ask whether values are original, wet, cold-conditioned or measured after UV/heat ageing.
Confirm whether the report belongs to the proposed production grade and whether batch inspection can be documented.
DERFLEX can match the base yarn, weave density, fabric weight, coating process, surface treatment and finished-cover reinforcement to the expected load and damage risk. This is more useful than choosing a tarp from GSM alone.
Buyers can discuss PVC tarpaulin rolls, cut panels or finished custom covers, with performance requirements stated by direction and test method. Optional project directions include UV resistance, flame-retardant formulation, cold flexibility, anti-mildew treatment, color matching, printing, welded seams, hems, webbing, corner reinforcement and hardware layouts.
The correct answer is usually “both,” but the dominant risk changes by installation, movement, environment and finished-cover design.
Wind pressure, tie-down force and cargo movement create tensile loading, while sharp edges, corners and hardware create tear initiation points.
Priority: tensile + tear + reinforcementScaffolding, steel edges, debris and repeated relocation make tear propagation and abrasion especially important under wind load.
Priority: tear + abrasion + tensileContinuous membrane tension and wind suction increase the importance of tensile capacity, dimensional stability, seams and local tear control.
Priority: tensile + seam + tearOutdoor ageing, repeated folding and rough ground contact can reduce retained strength even when initial laboratory values are adequate.
Priority: retained strength + UV + tearLarge panel size and attachment spacing affect load distribution. Edge, seam and hardware design should be reviewed with fabric tensile data.
Priority: tensile + edge integrityConcentrated contact with hard corners can begin a cut, while lifting, handling and wind can propagate it through an under-reinforced panel.
Priority: tear + patches + abrasion
Higher numbers can increase material cost and weight without solving the actual failure point. Start with the duty profile, define the likely failure mode and then set measurable acceptance criteria.
Send Your Application DetailsDescribe span size, wind exposure, tie-down tension, cargo movement, lifting, repeated folding and installation geometry.
Identify sharp edges, puncture hazards, rubbing surfaces, grommet stress, corner loading and likely snag points.
State the agreed tensile and tear standards, methods, directions, units and whether aged performance is required.
Match welds, seams, hems, webbing, patches, rope edges, D-rings and grommet spacing to the fabric and load path.
Confirm appearance, fabrication, key mechanical values and documentation before volume production.
Use a product code, approved construction and batch inspection plan to reduce variation across future supply.
These six internal resources help buyers move from mechanical-property comparison to material selection and supplier evaluation.
Concise answers for buyers, fabricators, distributors and project engineers comparing heavy-duty tarpaulin specifications.
No. Tensile strength measures how much pulling force an intact specimen withstands before breaking. Tear strength measures resistance to starting or propagating a tear in a notched or cut specimen. They use different test geometries and should be specified separately.
Yes. A dense, high-strength fabric may carry a large distributed load but still allow a localized cut to spread if yarn mobility, coating adhesion, damage geometry or local reinforcement is unfavorable.
Both are important. Tensile strength supports wind and tie-down loading, while tear strength helps control damage from cargo edges, punctures, corners and hardware. Reinforced hems, patches, webbing and attachment spacing must also be considered.
Compare only values produced with the same standard, procedure, direction, unit, specimen width and conditioning. Ask for warp and weft results and confirm that the report corresponds to the proposed material grade or batch.
Not necessarily. GSM includes the base textile and coating mass. Strength also depends on yarn denier, yarn tenacity, weave density, coating integration and finished-cover design. A heavier tarp can still fail at a weak edge, seam or attachment point.
Provide the application, tarp dimensions, installation method, expected wind or pulling load, sharp-edge and abrasion risks, outdoor exposure, target service conditions, required standards, quantity, color, finishing and whether you need roll material or finished tarps.
Send DERFLEX your application, dimensions, fabric format, test requirement, reinforcement details and order quantity. The team can discuss a practical PVC-coated tarpaulin structure and sampling direction for your project.
