Rubber Gasket Sample Policy MOQ | OEM Supplier

If you are sourcing sealing strips for a harsh environment—long-term UV exposure, sub-zero cycling, or repeated high-pressure friction—you need a sample policy and MOQ that align with engineering validation, not just inventory turnover. Here is exactly what we offer as a custom extrusion manufacturer serving B2B specifiers.

Material Selection for Harsh Environments: EPDM vs. PVC & Others

When a project demands performance beyond standard weatherstripping, the polymer matrix must be chosen by durometer, thermal aging, and compression set data—not price alone. Below is a head-to-head comparison of the three most common elastomers we extrude for industrial sealing.

Comparative Material Data Table

EPDM remains our default recommendation for outdoor sealing strips in railway, solar, and HVAC applications. Its ozone resistance and low-temperature flexibility outperform PVC in every accelerated aging test we run. PVC is acceptable for interior cabinet seals where UV and cold are not factors. Silicone is reserved for high-heat environments (e.g., oven gaskets) or where extreme low-temperature sealing is critical.

Sample Policy: From CAD to Cross-Section in 5 Days

We maintain a two-tier sample policy designed for project specifiers who need to validate fit and function before committing to production.

Standard Sample (Off-the-Shelf Profiles)

For existing extrusion dies (over 1,200 tool sets in our inventory), we ship samples within 48 hours of your request. No MOQ—just a nominal courier fee. This is ideal for initial fit checks or small prototype runs.

Custom Sample (New Tooling)

If your design requires a unique cross-section or compound modification, we produce a trial extrusion from a prototype die. Lead time is 5–7 working days after CAD approval. The sample fee covers tooling and setup, which is fully credited toward your first production order of 500 meters or more.

In our Hunan factory experience, the most common mistake specifiers make is skipping the compression set test on the sample. We always run a quick 22-hour ASTM D395 test at the customer’s specified temperature before shipping—this has saved multiple projects from field failures on high-pressure friction seals.

MOQ Structure for OEM/ODM Buyers

Our MOQ is determined by extrusion profile complexity and material cost, not by an arbitrary minimum order quantity. This approach allows us to serve both large-volume wholesalers and niche OEM projects.

Standard Profiles (Single Color, Single Compound)

• MOQ: 300 meters per profile
• Lead time: 10–15 working days from sample approval
• Packing: Coiled on cardboard reels or cut-to-length with end caps

Complex Profiles (Multi-durometer, Co-extruded, or Metal-inserted)

• MOQ: 500 meters per profile
• Lead time: 15–20 working days
• Note: We recommend ordering a pilot run of 100 meters first to validate extrusion tolerance and bonding integrity.

Wholesale / Bulk Orders

For annual contracts exceeding 5,000 meters, we offer tiered pricing with a 10% discount on the second and third shipments. MOQ can be flexed to 200 meters per shipment under a blanket order.

Tolerance & Quality Control: What ±0.3 mm Means in Production

Extrusion tolerance is not just a number—it determines whether your door sealing strips will compress evenly or leak under pressure. Our standard extrusion tolerance is ±0.3 mm for cross-section dimensions under 20 mm, and ±0.5 mm for larger profiles. This is verified by inline laser gauging every 10 meters during vulcanization.

For applications requiring tighter control (e.g., cabinet seals for IP-rated enclosures), we can achieve ±0.15 mm with post-extrusion calibration. The cost increase is approximately 8–12%, which is negligible compared to the cost of field failure.

Packing Options for Export

We pack all sealing strips for ocean freight with moisture barrier and anti-compression supports. Standard packing:

• Coils: 50–100 meters per coil, wrapped in stretch film and labeled with Shore A hardness, batch number, and material code.
• Cut lengths: Bundled in 2-meter or 3-meter lengths, strapped and palletized.
• Custom: End caps with foam inserts for fragile profiles (e.g., silicone series with hollow chambers).

No wooden pallets are used unless requested—we ship on recycled plastic pallets to avoid ISPM-15 compliance issues.

Frequently Asked Questions

What is your MOQ for custom rubber gaskets?

Our standard MOQ is 300 meters per profile for single-durometer EPDM or PVC. For co-extruded or metal-inserted profiles, the MOQ is 500 meters. We can reduce to 100 meters for a pilot run at a 15% surcharge.

How do I request a sample and what is the lead time?

Send your CAD drawing or a hand sketch with dimensions to our engineering team. For existing dies, samples ship within 48 hours. For new tooling, the sample is produced in 5–7 working days. The sample fee is refunded on your first production order over 500 meters.

What tolerances can you hold on extrusion profiles?

Standard tolerance is ±0.3 mm for dimensions under 20 mm, and ±0.5 mm for larger profiles. Tighter tolerances (±0.15 mm) are available for precision applications such as WPC profiles or IP-rated seals.

How do you pack sealing strips for international shipping?

We pack in coils or cut lengths with moisture barrier wrapping and anti-compression supports. All shipments use recycled plastic pallets. Each coil is labeled with material type, Shore A hardness, and batch number for traceability.

Can I get a sample before placing a bulk order?

Absolutely. We encourage sample validation before any production commitment. Our sample policy is designed to give you a production-grade sample—same compound, same extrusion die, same cure cycle—so you can test fit, compression, and aging before scaling.

Send Your CAD Drawing for a 24-Hour Quote

Contact our engineering team directly with your project file. We will return a detailed quotation including sample policy, MOQ, and lead time within one business day.