FAQ

1. What is an airtight waterproof zipper, and what sealing problems can YILON solve?

An airtight waterproof zipper is a sealing zipper designed to stop water, air, and moisture from entering or leaking through an opening when ordinary water-resistant zippers are not enough.

Dongguan YILON Industrial Co., Ltd. was founded in 2014 and focuses on the development, production, and customization of airtight waterproof zippers. The key value is not simple rain resistance; it is creating a reusable sealed opening for products that still need to open and close.

• Airtight sealing: helps reduce air leakage for inflatable, pressure-retaining, and isolation products.
• Watertight sealing: helps reduce water ingress through teeth, tape, and end areas.
• Customization: 5 cm to 100 m length, size, tape width, color, slider, opening style, material, and test requirements can be matched to the project.

2. What is the difference between airtight, watertight, and regular waterproof zippers?

A regular waterproof zipper mainly handles rain or splashes, a watertight zipper focuses on water sealing, and an airtight zipper also controls air leakage and pressure-related sealing.

3. How should I choose #5, #8, or #10 airtight waterproof zippers?

#5 is usually better for lightweight and flexible products, #8 for stronger waterproof gear, and #10 for heavy-duty, pressure-related, or industrial sealing projects.

4. What do IPX6, IPX7, and IPX8 waterproof ratings mean?

IPX6 means protection against powerful water jets, IPX7 means temporary immersion, and IPX8 means continuous immersion under agreed test conditions; exact depth, time, and pressure should be confirmed by project testing.

IP ratings follow IEC 60529: IPX6 means protection against powerful water jets, IPX7 against temporary immersion, and IPX8 against continuous immersion under conditions agreed between manufacturer and user. For zippers, the achievable rating depends on the sealing structure, installation method, and end treatment; sample testing is recommended.

5. How should I choose TPU, PEVA, silicone rubber, or nylon woven materials?

TPU fits many airtight waterproof projects, PEVA is lighter and more economical, silicone rubber suits wider temperature and premium sealing needs, and nylon woven structures fit garment and flexible fabric applications.

6. Which industries and products use YILON airtight waterproof zippers?

YILON airtight waterproof zippers are used in diving gear, waterproof outdoor bags, inflatable products, industrial rapid doors, protective suits, medical protection, watersports, and cold-chain logistics.

Watersports and rescue applications also commonly use airtight waterproof zippers, including wetsuit-style garments, rafting gear, life jackets, rescue suits, and marine equipment. These typically require saltwater resistance, repeated operation, and quick-drain design.

7. How can I know whether an airtight zipper is suitable for my product?

To judge whether an airtight zipper is suitable, check the sealing target, installation method, material compatibility, load direction, bending radius, operating frequency, and test result together.

• Sealing target: rain resistance, temporary immersion, continuous immersion, or air pressure retention.
• Installation: sewing, heat pressing, high-frequency welding, adhesive bonding, or combined process.
• Material compatibility: whether the zipper film bonds reliably with the product body.
• Load direction: straight pull, bending, twisting, long-term pressure, or frequent operation.
• End structure: leakage often happens at ends, corners, and seams, so they must be designed together.
• Maintenance: saltwater, sand, oil, detergent, low temperature, or high temperature exposure.
• Sample test: final validation should use the assembled product, not only the zipper alone.

8. What installation methods can be used for airtight waterproof zippers?

Common installation methods include high-frequency welding, heat pressing, sewing with seam sealing, adhesive bonding, and combined processes.

9. What main product series and variants does YILON offer?

YILON currently presents 9 main series, including #10 resin, #5 resin, self-healing, PEVA, nylon woven watertight, rapid door, circular airtight, and drysuit envelope products.

Beyond the standard series, YILON supports custom length, color, slider style, and end structure per project. Product detail pages list the variants of each series; contact YILON directly for samples and quotation on custom needs.

10. What is a self-healing airtight zipper?

A self-healing airtight zipper combines high airtightness with automatic realignment: after derailing, it realigns itself and keeps working — ideal for high-reliability applications.

Typical uses include inflatable products, rescue equipment, flexible sealed compartments, and repeatedly opened airtight access points (military equipment, waterproof gear, sealed bags and luggage, protective suits).

11. What products use circular airtight zippers?

Circular airtight zippers close a full 360-degree loop, used on openings that need closed-loop sealing.

Circular designs are used where a full-loop seal is required: neck and wrist openings on drysuits, access openings on inflatable boats and buoys, operation openings on medical isolation chambers, and full-perimeter waterproof openings on sealed luggage. Unlike straight zippers, a circular zipper has no open ends, so the seal is more uniform and suits products that open and close repeatedly while needing all-around waterproofing or airtightness.

12. What is a rapid roller door zipper?

A rapid-door zipper is the core sealing and load-bearing component of zippered high-speed doors, built for frequent fast operation with reliable sealing.

Typical applications include clean rooms, cold-chain logistics, industrial workshop partitions, and commercial public areas.

13. What information is needed to customize an airtight waterproof zipper?

To customize an airtight waterproof zipper, provide the application, length range (5 cm to 100 m), opening length, zipper size or tape width, color, opening style, slider quantity, mounting material, waterproof rating, oil resistance requirement, and estimated quantity.

• Application: drysuit, waterproof bag, industrial door, inflatable product, protective suit, and more.
• Dimensions: length range (5 cm to 100 m), opening length, tape width, bending radius, end structure.
• Structure: one-way or two-way, closed-end or open-end, single or double slider, inside/outside pull, puller style.
• Material and color: TPU, PEVA, silicone rubber, nylon woven, resin teeth, and target color.
• Testing: IPX6, IPX7, IPX8, oil resistance, or custom airtight/watertight test conditions.
• Purchase details: sample quantity, pilot quantity, mass-production quantity, lead-time target, and packaging needs.

14. How does YILON handle sample testing and quality confirmation?

Quality confirmation should cover material, dimensions, appearance, slider feel, airtight/watertight testing, end sealing, and assembled-product testing before mass production.

• Sample confirmation: model, color, length, opening style, slider, and end structure.
• Dimension check: tape width, total length, opening length, and tolerance.
• Sealing test: airtight, watertight, immersion, water jet, or pressure test according to project needs.
• Assembly test: validate welding, sewing, seam sealing, or bonding on the customer's real material.
• Mass-production confirmation: packaging, batch marking, delivery time, inspection method, and acceptance criteria.

15. How should samples be validated before bulk purchasing?

Before bulk purchasing, validate samples with real materials and the actual production process, then confirm dimensions, appearance, operating feel, sealing performance, and packaging needs.

16. What tests are commonly run on airtight waterproof zippers?

Common tests include waterproof rating, sealing pressure / pressure retention, open-close cycle life, salt spray, and temperature tests; specific items follow project requirements and the test report.

Before mass production, we recommend including test items and acceptance criteria in the purchase confirmation.

17. How much sealing pressure can an airtight zipper withstand?

YILON airtight zippers reference a 60kPa sealing-pressure test. Actual capability depends on size, material, installation, and end structure — confirm with project testing.

When selecting, share your target pressure and retention time so YILON can recommend the right size and arrange sample validation.

18. What is the temperature range of airtight waterproof zippers?

TPU has a reference temperature range of about -30°C to 70°C; PEVA, silicone rubber, and other materials differ — confirm with the selected material and project testing.

If your product sees prolonged cold or hot conditions (cold storage, polar gear, heat protection), state the operating temperature at inquiry so the material plan can be matched.

19. How long does an airtight waterproof zipper last, and how should it be maintained?

The service life depends on the environment, operating frequency, installation, and maintenance; cleaning, lubrication, avoiding sharp folds, and not forcing the slider over sand can reduce failure risk.

• Cleaning: rinse with clean water after saltwater, sand, or dust exposure, then dry the zipper.
• Lubrication: choose lubricant compatible with the project material and avoid oils or solvents that damage the sealing film.
• Operation: pull smoothly along the zipper direction and do not force the slider when fabric, sand, or misalignment is present.
• Storage: avoid long-term heavy pressure, sharp folding, direct sunlight, and heat sources.
• Inspection: check slider, ends, sealing film, stitching, and welded seams for wear, deformation, or cracks.

20. What kind of company is YILON, and what certifications does it hold?

Dongguan YILON Industrial Co., Ltd. was founded in 2014 in Dongguan City, Guangdong Province. It is a National High-Tech Enterprise focused on the R&D, production and sales of airtight waterproof zippers.

With modern production workshops and advanced equipment, YILON operates a comprehensive quality management system to keep products meeting international standards.

21. Which markets does YILON export to?

YILON products are exported to more than 30 countries and regions, including North America, Europe, Southeast Asia, and the Middle East, with long-term partnerships with over 300 enterprise clients.

YILON actively participates in international exhibitions and continues to expand its global network, with products used in outdoor gear, water sports, industrial protection, medical equipment, and more.

22. How long do sampling and mass production take?

Typical reference: samples take about 7-15 days and production about 15-30 days, depending on specs, material, and quantity — subject to supplier confirmation.

Confirm sample lead time, production lead time, and sample fee at the inquiry stage to plan your project milestones.

23. What is the minimum order quantity (MOQ)?

MOQ varies by spec and material with no fixed number. Provide your estimated quantity when inquiring and YILON will confirm for your specific project.

Custom zippers are available from 5cm to 100m in length; sample, pilot, and mass-production quantities can be discussed separately.

24. Where can I find more detailed selection and technical references?

The YILON website has a Technical Guides Center (www.dgyilon.com/guides/) with 8 bilingual guides covering selection, test standards, materials, and procurement.

For samples or project-specific selection advice, contact YILON directly.

25. Contact YILON for samples, selection advice, or quotation

Send the application, dimensions, material, waterproof rating, quantity, and photos to YILON; the team can recommend the series, sample plan, and quotation based on the project.

For a faster reply, include product photos, opening-position drawings, target waterproof rating, and estimated order quantity.