The global adult toy market sales in 2025 are approximately200.1 billion yuanNorth America accounts for more than 31%. Sex toys come into direct contact with human mucous membranes. If the seal fails, it can lead to serious consequences such as electric leakage, fire and bacterial growth. High-end products adoptUltrasonic welding + silicone coatingDouble sealing to achieve IPX7/IPX8 waterproof rating. ISO 3533:2021 clearly stipulates that products in contact with body fluids must pass the IPX7 water immersion test and air tightness test. This article comprehensively analyzes the sealing technology and sealing testing of sex toys from market trends, core processes, testing standards, brand landscape to equipment solutions.
With the popularization of functions such as vibration, heating, charging and APP control, sealing performance has become the lifeline of product safety
According to QYResearch,The global adult toy market sales reached approximately 200.1 billion yuan in 2025. Among them, the male adult products market is expected to approach 19.11 billion yuan by 2032, with a compound annual growth rate (CAGR) of 8.5%.
From the perspective of regional distribution,North America is the world's largest consumer region, accounting for more than 31% of the global market share; North America and Europe together account for nearly 65% of the share. Influenced by traditional concepts, the Chinese market has relatively conservative consumption. However, as concepts gradually open up, it is expected that China's market share will increase to by 202912%。
The sealing performance of sex toys directly determines whether the products can lastA damp or even completely submerged environmentWork safely in the middle. Its core goals include:
| Process name | Technical principle | Core advantage | Applicable parts | Cost grade |
|---|---|---|---|---|
| Ultrasonic welding | High-frequency vibration causes the molecules at the interface of plastic parts to melt and bond | No glue, no flash, extremely high efficiency (over 4,000 pieces per day), and excellent sealing consistency | The upper and lower shells are welded to each other | In the |
| Silicone /TPE coating molding | Inject liquid or solid silicone rubber to wrap the internal components | Soft to the touch, good biocompatibility, and high protection level (up to IPX8) | Full coverage outer skin | Higher |
| O-ring/sealing ring | The compression deformation of the elastomer fills the gap | Simple structure and detachable for maintenance | Charging port, battery compartment | low |
| Potting/dispensing sealing | Fill the internal cavity with epoxy resin or silicone rubber | After complete curing, it is hard, waterproof and has good vibration resistance | PCB circuit board | Lower |
| Hot-pressing/crimping sealing | The material is fused and sealed by pressure and temperature | Low cost and simple operation | The end of low-cost products is sealed | low |
According to industry patents and disassembly analysis of leading brands (such as We-Vibe and LELO), it is widely adopted in high-end sex toysDouble-layer composite sealing structure：
| IP rating | Description of protection capability | Application levels of sex toys |
|---|---|---|
| IPX4 | Splash-proof water (in any direction | Basic splash-proof products |
| IPX5 | Anti-spray water (nozzle | The product can be simply rinsed |
| IPX6 | Prevent strong water spraying | Strong rinse product |
| IPX7 | Soak in water 1 meter deep for 30 minutes | The high-end/mainstream standard configuration as stipulated in ISO 3533 |
| IPX8 | Continuous immersion (over 1 meter, as defined by the manufacturer) | High-end products of diving grade |
Seal failure can lead to leakage, fire and bacterial growth. Air tightness testing is the core link of 100% full inspection on the production line
Adult toys come into direct contact with the most vulnerable mucous membrane areas of the human body. The failure of the seal is not as simple as "breaking down".
| Standard/Specification | Specific sealing requirements |
|---|---|
| ISO 3533:2021(International | It is clearly required that products in contact with body fluids must achieve an IPX7 waterproof rating, and the charging interface must be designed with a sealed waterproof structure. |
| QB/T 5858-2023(China Light Industry | China's first national standard for adult sex toys clearly requires manual comfort devices to undergo air tightness testing. |
| IEC 61010(Electrical Safety | Insulation resistance and withstand voltage tests must be completed to ensure there is no risk of leakage. |
| Jd.com/Tmall quality control standards | Platform spot checks cover waterproof tests and free drop tests. |
| Test type | Test content | Core detection equipment | Judgment criteria |
|---|---|---|---|
| Air tightness testing (non-destructive | Fill the inner cavity of the product with compressed air/nitrogen-hydrogen mixed gas and monitor the pressure attenuation or leakage flow | Differential pressure/direct pressure leak detector, nitrogen-hydrogen leak detector | Leakage rate ≤ specified threshold (e.g. 0.1mL/min) |
| IPX7 immersion test | Simulate a water depth of 1 meter and soak for 30 minutes | Immersion testing machine | Disassemble the machine to check if there are no water droplets seeping inside |
| Insulation resistance test | Evaluate the insulation characteristics of the internal circuit after waterproofing failure | Insulation resistance tester | Insulation resistance ≥100MΩ |
| Withstand voltage test | Apply high voltage to detect whether it breaks down | Withstand voltage tester | No breakdown, no flashover |
| Temperature shock test | Extreme cycling from -20℃ to 40℃ is carried out to verify the sealing retention force of the material under thermal expansion and contraction | High and low temperature alternating test chamber | The sealing structure is free from cracking and failure |
The global market is highly fragmented, with the top 15 manufacturers collectively accounting for only about 3% of the revenue. The leading enterprises are mainly concentrated in Europe, America and Japan.
| Brand | Headquarters | Market positioning | Sealing process characteristics |
|---|---|---|---|
| LELO | Sweden | High-end luxury | Precision metal + silicone, ultrasonic welding is extremely strict |
| We-Vibe | Canada | Mid-to-high-end couples | Fully enclosed waterproof silicone skin technology, an industry benchmark |
| Lovehoney | Britain | Mass product range | Rich product line and cost-performance strategy |
| Doc Johnson | The United States | Manufacturing giant | Decades of manufacturing experience, mature technology |
| Fun Factory | Germany | Mid-to-high-end | German precision engineering, with strict sealant injection and sealing |
| TENGA | "Japan | Male masturbation | Precision manufacturing in Japan, with a unique structural design |
| Brand | Features |
|---|---|
| The beauty of accumulation | One of the major domestic OEM/ODM manufacturers |
| SVAKOM | Chinese brands that ventured overseas earlier have internationalized their designs |
| Ailu Health Technology | A well-known domestic comprehensive manufacturer |
| LETEN | Mainstream domestic e-commerce brands |
| Nolan (Nalone | Hong Kong background, emphasizing design sense |
| "Comparison dimension" | International leading brands (LELO/We-Vibe) | Leading domestic brands |
|---|---|---|
| Sealing structure | Ultrasonic welding + silicone overmolding (double assurance) | Single adhesive bonding or single-layer ultrasonic welding |
| Standard IP rating | IPX7 (100% factory inspection) | IPX5 ~ IPX7 (mainly sampling inspection) |
| Testing equipment investment | Introducing high-precision air tightness leak detectors for 100% inline inspection | Relying on traditional immersion testing or low-end pressure gauge sampling inspection |
| Material Standards | Medical-grade platinum-cured silicone (ISO 10993 certified) | Primarily food-grade silicone |
As the global adult products market surpasses RMB 200 billion and international standards such as ISO 3533:2021 are strongly promoted,Sealing processes and sealing tests have shifted from a "nice-to-have" to a "must-have."。
The industry trend clearly points toDual sealing structure combining ultrasonic welding and silicone overmolding, as well as the standard high-level waterproof configuration of IPX7/IPX8. For manufacturers, introducing high-precision air tightness leak detectors to replace traditional immersion sampling inspection is the essential path to upgrading quality control, meeting export compliance requirements, and reducing customer complaint risks.
As a national high-tech enterprise, PLUS (Guangzhou) Intelligent Technology Co., Ltd. has long been dedicated to the field of air tightness testing and is committed to supporting the safe and high-quality development of the adult products industry with professional technology and reliable equipment.
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