Custom 500D PVC Waterproof Dry Bag: 2L to 30L, High Frequency Welded, Submersion Tested
Request a Wholesale Quote:
Quick B2B Sourcing Overview
- MOQ: Sample orders welcome — flexible
- Lead time: Sample 7-10 days | Mass production 15-25 days
- Material: 500D PVC tarpaulin (0.5mm thick) + polyester mesh inter-layer
- Capacities: 2L, 3L, 5L, 10L, 15L, 20L, 30L (custom to 80L)
- Construction: High frequency hot melt welding (seamless)
- Waterproof: Submersion tested 1m depth / 30 seconds
- HS code: 4202.92.0000 (US duty 12.5%)
Attribute Data Matrix
| Capacity | Size (W*H1 cm) | Size (D*H2 cm) | PCS/CTN | Carton dims (cm) | Weight (kg) |
|---|---|---|---|---|---|
| 2L | 18.5x28 | 12x15 | 100 | 45x35x30 | 11.5 |
| 3L | 22.5x33 | 14.5x18 | 100 | 50x40x30 | 18.2 |
| 5L | 28.5x42 | 18x23 | 50 | 45x35x30 | 15 |
| 10L | 31.5x50 | 20x31 | 50 | 45x35x30 | 15.7 |
| 15L | 34.5x55 | 22x35 | 30 | 40x35x30 | 12 |
| 20L | 37.5x60 | 24x40 | 30 | 40x35x30 | 13 |
| 30L | 42x70 | 27x50 | 30 | 45x40x30 | 17 |
Other specs: Material: 500D PVC tarpaulin, 0.5mm thick. Closure: Roll-top with heavy duty plastic buckle and nylon strap. Color options: black, white, green, pink, orange, blue, custom. Single package reference: 30x12x3 cm, 0.160kg.
Technical Comparison Analysis
500D PVC High Frequency Welded vs. 210D Nylon Stitched Dry Bags
500D PVC: 0.5mm thick, weight ~300g for 10L. Seamless high frequency welding (molecular bond). Waterproof rating: submersion 1m/30sec. Abrasion resistance: high (tarpaulin grade). Tear strength: reinforced with polyester mesh ("steel in concrete"). 210D Nylon: ~150g for 10L. Stitched seams with tape sealing. Waterproof rating: splash-proof only, tape degrades over time. Abrasion resistance: moderate. Tear strength: lower without coating. For kayaking where bag may drag on rocks, 500D PVC lasts longer. For ultralight backpacking, nylon saves weight but risk of seam leakage.
High Frequency Welding vs. Heat Sealing vs. Stitching
High frequency welding: Uses RF energy (27.12 MHz) to fuse PVC at molecular level. No adhesive. Weld strength equals parent material. Heat sealing: Uses heated bar (150-200°C) to melt PVC. Lower consistency, risk of burn-through. Stitching with seam tape: Needle holes create leakage points; tape peels after 1-2 years. This bag uses high frequency welding on all main seams, plus double layer sewing only on strap attachments (non-wetted area).
Multi-Scenario Buyer Applications
Kayaking Tour Operator – Client Gear Storage
A kayak rental company on Lake Tahoe needed 200 dry bags to keep client phones, wallets, and change of clothes dry during 3-hour paddling tours. They previously used cheap vinyl bags that leaked after 20 uses. They selected 10L and 15L 500D PVC bags with high frequency welded seams. The bags are submerged daily — operator tested each bag by filling with air and dunking. Zero failure after 6 months. The roll-top closure with heavy duty buckle is easy for customers to use. The double-sided PVC with polyester mesh inter-layer resisted abrasion from sandy kayak cockpits. Reorder: 300 pieces the next season with custom printed logo.
Camping Club Merchandise Coordinator – Branded Gear for Members
A national camping club with 500 members wanted a branded dry bag as part of the annual membership kit. They needed a durable bag that could be rolled up small in a backpack but hold a change of clothes and sleeping bag liner. The 5L and 10L sizes were selected. Custom screen printing applied the club logo in two Pantone colors. The high density nylon strap and heavy duty buckle withstand years of use. Each bag was individually packed in an OPP bag for presentation. MOQ was flexible — club ordered 300 units initially. Members reported the bag worked well for weekend camping trips. Reorder at 450 units the following year.
Corporate Event Planner – Beach Day Swag for 150 Employees
A tech company held a summer beach day for 150 employees and wanted a useful giveaway. They chose 5L waterproof dry bags with the company logo printed in bright blue. The bags were folded into their own pocket size (single package reference 30x12x3 cm) and packed into gift boxes. Employees used them to protect phones and keys while swimming. The high frequency welded seams ensured no leaks when bags were tossed in the ocean. The roll-top closure with buckle was intuitive. Total order: 150 pieces delivered in 18 days. The HR manager reordered 200 pieces for next year's event plus 50 for new employee onboarding kits.
FAQ Matrix
Custom Production: Can you print a full-color photo on the PVC dry bag?
No. The recommended method is screen printing with up to 4 Pantone spot colors. PVC material is not compatible with sublimation. For photo-quality, heat transfer is possible but less durable (may peel after 20 uses). Screen printed logos on 500D PVC last 2-3 years in outdoor use. Provide vector artwork with Pantone codes. Minimum line thickness 1.5mm. For complex multi-color logos, we can reduce colors or discuss alternatives.
Logistics & Shipping: What is the most economical way to ship 500 pieces of mixed 5L,10L,20L to Seattle?
Based on carton data: 5L: 50 pcs/carton, carton 45x35x30cm, 15kg. 10L: 50 pcs/carton, 45x35x30cm, 15.7kg. 20L: 30 pcs/carton, 40x35x30cm, 13kg. For 500 pieces mixed, total volume approx 10-12 cartons = 0.8-1.0 CBM. Sea freight LCL minimum 2 CBM, so you would pay for 2 CBM even if using less. To optimize, combine order with other products or increase quantity to 1000 pieces (2 CBM). Express air for 500 pieces (cartons weight ~150kg) costs $600-900 and takes 4-6 days. Sea freight at 2 CBM costs $200-300 plus customs clearance. Request a freight quote with your exact size mix.
Payment & Terms: Do you offer payment against shipping documents for a 1000-piece order?
Yes, for orders above $5,000. Standard T/T: 30% deposit, 70% against scanned copy of bill of lading (sea freight) or airway bill (express). For first-time buyers, we require 50% deposit. For repeat corporate accounts with purchase order history, net 30 available after credit check. We accept L/C at sight for orders above $10,000. Sample orders require full payment upfront via PayPal or credit card.
Quality & Compliance: How do you ensure the high frequency weld doesn't fail after repeated use?
We perform a destructive peel test on 2% of each batch: a 5cm weld sample is pulled in a tensiometer — minimum break force 200N. Weld thickness is measured to ensure complete fusion (target 0.8-1.0mm after welding). Each bag is air-inflated and submerged for 30 seconds at 1m depth. For orders above 500 pieces, we provide a video of 10 random bags passing the submersion test. The high frequency process creates a molecular bond that is actually stronger than the surrounding PVC — failure occurs outside the weld, never at the seam.
Kayaking Tour Operator — fleet of 200 10L bags for client gear storage
Camping Club Merchandise Manager — branded dry bags for 300 members, custom logo
Corporate Event Planner — summer beach day swag for 150 employees, 5L size with company logo
Boating Supply Distributor — 1000 pieces mixed capacities for resale to marine stores
Survival Gear Brand Owner — 200 pieces 20L and 30L for emergency kits, custom olive color Facility Origin
Q: Kayaking gear storage, camping equipment dry bag, beach day packing, boating supply organizer, hiking backpack liner, fishing gear protection
A:
Why SupplyBatch



Real Craftsmanship, Small-Batch Ready
We don’t just chase scale; we care about the details. From the initial sample to the final product, every step is handled with care to make sure your design looks just as good in real life as it does on your screen.
At SupplyBatch, you’re working with real product pros. We know that custom merch is your brand’s reputation on the line, so we dig into the details: we’ll analyze your artwork, suggest material upgrades for longevity, and double-check your proofing so there are no surprises when the boxes arrive.



Quality Checked & Shipped Right
We inspect every piece before it leaves our floor, weeding out the ones that don't make the cut. We also know the ins and outs of shipping smaller batches—getting them to you safely and cost-effectively, so you don’t have to worry about a thing.
You bring the vision, and we bring the practical, boots-on-the-ground expertise to turn your ideas into high-quality products that actually hit the mark.
Customization with Brand Services



Customization with a Personal Touch
You’re working with experts who understand the technical side of custom manufacturing inside and out. We don’t just process orders; we act as an extension of your team. Whether it’s fine-tuning your logo dimensions to ensure it looks sharp, recommending the most durable materials for your specific use-case, or troubleshooting production files before they hit the machines—we’re hands-on. We’re here to bridge the gap between your initial sketches and the professional-grade merchandise you’ll be proud to put your name on.
At SupplyBatch, you’re working with real product pros. We know that custom merch is your brand’s reputation on the line, so we dig into the details: we’ll analyze your artwork, suggest material upgrades for longevity, and double-check your proofing so there are no surprises when the boxes arrive. You bring the vision, and we bring the practical, boots-on-the-ground expertise to turn your ideas into high-quality products that actually hit the mark.
Custom Apparel & Bag --- Office & Business --- Tech --- Event & Promotional --- Lifestyle & Outdoor --- Home & Living --- Industrial & Hardw
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