Custom Logo Dry Bag – Roll-Top OEM. Capacities 3, 5, 6, 10, 15, 20 and 63L, other sizes developed on request. Body: 500D PVC tarpaulin 0.5mm, TPU, phthalate-free PVC or GRS recycled fabric. High-frequency welded seams with a PVC sealing film inside the roll-top. Closure: roll-top and buckle (IPX7) or airtight zipper (IPX8). Options include clear window, purge valve, dry-wet inner pouch, single, double or detachable straps, and D-rings placed to your layout. Logo methods: screen print (1–3 colours), digital/UV, heat transfer, welded TPU 3D badge, reflective print. MOQ 300 per design. Logo sample in 7–15 days. Bulk on the SL-D002 base takes about 20, 25 or 30 days for up to 500, 2,500 or 5,000 pcs; other bases take 30–45 days. FOB Guangdong, Vietnam origin quoted separately. REACH and Prop 65 compliant material. Factory has BSCI, SMETA and ISO 9001 audits.
This is a Custom Logo Dry Bag – Roll-Top OEM produced to your specification and carrying your logo. You select the capacity, body material, colour, closure, carry system, logo method and retail packaging; Sealock builds the bag on one of its existing base models or develops a new pattern for you. All bags are made with high-frequency welded seams, and the roll-top has a PVC sealing film on the inside of the opening so that the rolled section seals against itself rather than against bare fabric.
The standard closure is a roll-top secured with a side-release buckle, rated IPX7 and verified with a full water-immersion test, 2+ hours. Where the bag must stay sealed under water for longer, the opening can be built with an airtight zipper rated IPX8. Seven capacities are kept as standard tooling: 3, 5, 6, 10, 15, 20 and 63 litres. Other volumes are developed as new patterns.
The minimum order is 300 pieces per design, and that 300 can be split across sizes and standard colours within the same design. Logo samples take 7–15 days. Production runs from our factories in Dongguan, China and Ho Chi Minh City, Vietnam, shipped FOB Guangdong or quoted on Vietnam origin.
At a Glance
Product type
Roll-top dry bag built to buyer specification, printed with the buyer's logo
Standard capacities
3L, 5L, 6L, 10L, 15L, 20L, 63L (other sizes developed on request)
300 pcs per design; sizes and standard colours can be split within one design
Logo sample
7–15 days
Bulk lead time
SL-D002 base: about 20 days up to 500 pcs, 25 days up to 2,500 pcs, 30 days up to 5,000 pcs; other bases 30–45 days
Terms and origin
FOB Guangdong; Vietnam origin quoted separately
Compliance
EU REACH phthalates, California Prop 65; third-party test reports available
What You Can Specify
A custom order is defined by eight choices. Capacity comes first, because it fixes the base pattern and the printable area. Body material follows: 500D PVC tarpaulin at 0.5mm is the standard; TPU gives a softer hand and lower weight; phthalate-free PVC is used for programmes sold into the EU and California; GRS recycled fabric is available for buyers who need a recycled-content claim backed by certification.
Colour can be chosen from our standard range or matched to a Pantone reference. The closure can stay as the standard roll-top and buckle or move to an airtight zipper. Functional parts are added as needed: a clear window, a purge valve to release trapped air, a dry-wet separation inner pouch, a single shoulder strap, a double shoulder harness, or a detachable strap, with D-ring positions set to your layout. The last two choices are the logo method and the retail packaging, both covered in detail below.
Base Models You Can Start From
Starting from an existing base model shortens sampling and lead time, because the pattern, welding dies and test history are already in place. The following models are available as bases for a logo programme:
If none of these fits, Sealock develops a new pattern from your drawing, a reference sample or a target specification. New development takes longer than a base-model order, and the timeline is confirmed at quotation.
Where the Logo Is Placed
The logo is printed on the flat body panel below the roll-top fold zone, and kept clear of all welded edges. There are two reasons for this rule. The fold zone is rolled and unrolled every time the bag is used, and ink printed there cracks along the fold lines within weeks. Ink that runs into a weld line sits between the two layers of material when the seam is welded, which weakens the bond at exactly the point the bag relies on to stay watertight.
The printable area therefore depends on capacity. A 3L bag has room for a compact mark; a 20L or 63L bag can carry a large logo, a slogan line or a second print on the reverse panel. When you send artwork, we return a placement drawing on the chosen base model with the printable zone marked, so position and size are agreed before sampling.
How an Order Runs
An order starts with a brief: capacity, quantity per size and colour, material, closure, accessories, logo artwork in vector format and the target market. From that we issue a quotation with unit price, sample cost and lead time. Once the quotation is accepted, we produce a logo sample on the chosen base in 7–15 days. That sample becomes the approved reference for colour, print position and finish.
Bulk production starts after sample approval and deposit. On the SL-D002 base, an order of up to 500 pieces takes about 20 days, up to 2,500 pieces about 25 days, and up to 5,000 pieces about 30 days. Other base models take 30–45 days. Before shipment, every batch is checked against the approved sample and through the inspection steps listed in the Quality Inspection Standards section.
Specifications
Engineering Specifications
Seam construction
High-frequency welded seams
Roll-top seal
PVC sealing film inside the opening; roll at least three times before buckling
Standard closure rating
IPX7 — full water-immersion test, 2+ hours
Airtight zipper option
IPX8 — full water-immersion test, 2+ hours
Standard capacities
3L / 5L / 6L / 10L / 15L / 20L / 63L
Non-standard sizes
New pattern development on request
Material Specifications
Standard body
500D PVC tarpaulin, 0.5mm
Alternative bodies
TPU; phthalate-free PVC; GRS recycled fabric
Phthalate limit (EU REACH)
DEHP, DBP, BBP and DIBP combined ≤ 0.1%
California
Prop 65 compliant material available
Test reports
Third-party reports available on request
Functional Specifications
Closure
Roll-top with buckle (standard) or airtight zipper
Window
Clear window panel, optional
Air management
Purge valve, optional
Inner layout
Dry-wet separation inner pouch, optional
Carry system
Single shoulder strap, double shoulder harness or detachable strap
D-rings
Position and number set to buyer layout
Customization / OEM Specifications
MOQ
300 pcs per design; sizes and standard colours may be split within the design
Flat body panel below the fold zone, clear of welded edges
Logo sample
7–15 days
Bulk lead time
SL-D002: ~20 days (≤500 pcs), ~25 days (≤2,500 pcs), ~30 days (≤5,000 pcs); other bases 30–45 days
New design development
From drawing, sample or target specification; longer lead time, confirmed at quotation
Packaging Specifications
Standard
Individual PE bag
Optional retail packaging
Hang tag, header card, closure instruction card, colour box
Labelling
Barcode labels to buyer specification
Recommended Use
Use
Suitable
Notes
Promotional and corporate merchandise
✔
Screen print is the most economical method at MOQ
Retail private label for outdoor and water-sports stores
✔
Colour box, header card and barcode available
Kayak, paddleboard, boat and beach kits
✔
Roll-top IPX7 for spray, rain and short immersion
Tour operators, rental fleets, events
✔
Mixed sizes within one design under one MOQ
Extended submersion of contents
✔
Specify the airtight zipper (IPX8) option
Buoyancy aid or life-saving device
✘
A closed bag may float, but it is not a flotation device
Quality Inspection Standards
Each production run begins with a weld peel test on the first pieces off the line, so that welding temperature, pressure and time are confirmed before volume production. Roll-top closures are sampled from every batch for a full water-immersion test, 2+ hours. Buckles, webbing and D-rings are pull-tested to confirm the attachment points hold under load.
Printed logos go through a tape adhesion test and a rub test to confirm the ink is bonded to the material and does not wear off under handling. Colour is compared against the approved sample, so that the bulk order matches what you signed off. The factory runs IQC, IPQC and OQC stages, and third-party inspection by SGS or QIMA can be arranged.
When a customer inspection is booked, the procedure is fixed: unboxing, vacuum extraction, a 24-hour static rest, then the air-leak determination. Any piece that loses pressure over the rest period is rejected.
Product Highlights
Seven standard capacities
3L to 63L on existing tooling; other sizes developed
Split MOQ
300 pcs per design, mixed across sizes and standard colours
Defined logo zone
Below the fold, clear of welds, to avoid cracked ink and weakened seams
Fast base-model route
SL-D002 orders up to 500 pcs in about 20 days
Two origins
China (Dongguan) or Vietnam (Ho Chi Minh City)
Audited factory
BSCI, Sedex SMETA and ISO 9001 audits; GRS available
Printing & Logo Options
Method
Colours
Where it fits
Screen print
1–3 spot colours
The most economical option at MOQ; solid logos and text
Digital / UV print
Full colour
Photographs, gradients, multi-colour artwork
Heat transfer
Full colour or spot
Fine detail and small marks
High-frequency welded TPU 3D badge
Badge colours to spec
Raised branding fused to the bag body, no ink layer
Reflective print
Reflective silver
Visibility in low light, on water or roadside
Choosing a method comes down to artwork and quantity. A logo of one to three flat colours is screen printed; each colour needs its own screen, so cost rises with colour count, not with quantity. Artwork with photographs or gradients goes to digital or UV printing, which has no screen cost. A welded TPU badge suits buyers who want a raised mark that stays on the bag for its whole life. Reflective print is added where the bag will be carried at dusk or on the road. For a cost comparison by method and quantity, see promotional dry bags with custom logo: printing methods, MOQ and unit cost.
OEM/ODM & Wholesale
Sealock has produced waterproof bags for global brands for over 20 years, with high-frequency welding and sewing both run in-house. Any custom requirement in this programme can be met, from a logo on a standard base to a fully new bag developed from a sketch. Complex new developments carry longer lead times, and that timeline is set out in the quotation.
Standard terms are FOB Guangdong. Vietnam origin is quoted separately. For US buyers, origin affects landed cost: since 24 July 2026, both China-origin and Vietnam-origin goods carry the 12.5% Section 301 duty, and China-origin goods additionally carry the existing China-specific Section 301 tariffs. We quote both origins on request so you can compare duty-paid cost.
Material compliance documents are prepared for the target market: EU REACH phthalate limits (DEHP, DBP, BBP and DIBP combined at no more than 0.1%) and California Prop 65, with third-party test reports available. The factory holds BSCI, Sedex SMETA and ISO 9001 audits, and GRS certification is available for recycled-material programmes.
Most cracking happens because the logo was printed in the roll-top fold zone, where the material is bent every time the bag is closed. We print only on the flat body panel below the fold and clear of welded edges, and every batch passes a tape adhesion test and a rub test before shipment.
Will the bags smell of PVC when my customers open them?
Fresh PVC can carry an odour straight out of a sealed PE bag. If odour matters for your market, specify phthalate-free PVC or TPU, both of which have a much lower odour. Bags can also be aired before packing on request.
Why does a roll-top bag sometimes leak after rolling only once?
A single fold does not seal. The roll-top needs to be rolled at least three times before the buckle is closed, so that the internal sealing film presses against itself. We can add a closure instruction card to each bag so end users close it correctly; see our guide on how to close a roll-top dry bag.
How do I make sure bulk colour matches the approved sample?
Colour is confirmed on the logo sample, matched against your Pantone reference, and that sample becomes the production standard. Every batch is compared to it before packing. Material and lighting can shift appearance slightly, so the comparison is made under a standard light source.
Can I split the 300-piece MOQ across sizes and colours?
Yes. Within one design, the 300 pieces can be split across the standard sizes and standard colours. Custom Pantone colours and special materials are quoted with their own minimums because the material is ordered for your job.
Is there a sample fee, and how long does sampling take?
A logo sample takes 7–15 days. The sample cost depends on the base model, print method and number of colours, and is stated in the quotation before you confirm.
What is the production lead time?
On the SL-D002 base, about 20 days for up to 500 pieces, 25 days for up to 2,500 pieces and 30 days for up to 5,000 pieces. Other base models take 30–45 days. Lead time starts after sample approval and deposit.
Will the bag float?
A closed roll-top bag with air trapped inside will usually float, which helps if it is dropped overboard. It is not a buoyancy aid or life-saving device and must not be sold or used as one.
Can you make a completely new dry bag design, not just add a logo?
Yes. We develop new bags from a drawing, a reference sample or a target specification, including new sizes, shapes, closures and carry systems. New development takes longer than a base-model order; the timeline is confirmed at quotation.
Which printing method should I choose?
For a logo of one to three flat colours, screen print is the most economical at MOQ. For photographs or gradients, use digital or UV print. For a raised mark with no ink layer, choose a welded TPU 3D badge. Add reflective print if the bag will be carried in low light. Send your artwork and we will recommend the method and give the cost.
Request a Quote
Send us the capacity, quantity per size and colour, body material, closure, accessories, logo artwork and target market. We will reply with a placement drawing, unit price, sample cost and lead time, for China or Vietnam origin. Submit your brief through the inquiry form or email info@sealock.com.hk.
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