IP68 sealed model and IP65/IP66/IP67 waterproof etc. How many different categories?

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HOME » MCT Transit Sealing System » IP68 sealed model and IP65/IP66/IP67 waterproof etc. How many different categories?

--- 2026-03-16 13:53:59 --- Published by: TST Seal ---

IP68 sealing model and other waterproof properties (such as IP65, IP66, IP67) are divided into core categories: depth of protection ability, maintenance time and application environment. However, the second digit (waterproofing, etc.) is 5 to 8, and has the waterproof performance of a ladder type casing.

Approach, TST SEAL Nico general information, four types of waterproofing, etc., details, test specifications, technology implementation, workplace scenery and selected construction:

1. IP waterproofing, etc. specifications (as per IEC 60529 / GB/T 4208)

grade	Waterproof ability description	Typical exam conditions
IP65	anti-low water	6.3mm beak, 12.5 L/min, 3m distance, ≥1 min.
IP66	Defense Force Water/Sea Wave	12.5mm beak, 100 L/min, 0.1 MPa, ≥1 min.
IP67	Water resistant during short periods of time	1 meter deep, still water, 30 minutes
IP68	Depth of water immersion	Yusei Manufacturing Determination (Regular: 1.5~10 meters, 30 minutes~several laps)

✅ Different keys:

IP65/66: Waterproof external water resistance;

IP67: Unexpected water fall;

IP68: Long term underwater work.

1. IP68 vs. other items: differences in technology reality

characteristics	IP65 / IP66	IP67	IP68
sealed bag	South tiered carpet + 压盖	Twin O-shaped chamber + sealed chamber	Multi-lipped mouth labyrinth sealing + Chun lubricant filling + Gao Gui permanent deformable material
material requirements	Normal EPDM/NBR	Water-resistant EPDM	High purity EPDM/Silicone + anti-peristalgic arrangement
coffin design	General iron/plastic	Thickened wall + solid screw plug	All-Metal (316L Stainless Steel) + Helium Leak Detection Verification
power balance	lack of demand	lack of demand	Regular demand force balance valve or fully sealed cavity
Typical leakage rate	≤5 mL	≤1 mL	Free water (<0.1 mL)

🔧 IP68 key technology:

If you want to add a new version to the game, you can add it to the page.

Filling of the body with a lubricant-forming closed cavity;

PCB coating three protection lacquer + sealing double protection.

1. Scenic ratio of the workplace

Protection etc.	Application scene	Unsuitable scene
IP65	External power distribution box, train towing station, open-air statue head	Rain water area, water rich area
IP66	Port machinery, high cleaning equipment, heavy rain area	Flooding, underwater work
IP67	Car pilot, industrial sensor, intelligent hand chart	Long-term bubble water, deep water environment
IP68	Underwater equipment (ROV), swimming pond clearing machine, bottom of marine wind tower tube, submarine equipment, underground pipe connection box	Drying indoor environment (Yoko Narimoto)

💡 Selection style:

“65 for water, 66 for water, 67 for falling water, 68 for diving.”

1. Narimoto lifespan ratio

grade	Aihon Naruhon	Sealing lifespan	Maintenance Frequency
IP65	1.0x (baseline)	5–8 years	low
IP66	1.2x	4–6 years	Medium
IP67	1.5x	3–5 years	middle and high school
IP68	1.8–2.5x	2–4 years (in sealing change)	The grease and O-rings must be checked periodically for signs of aging.

⚠️ Attention: IP68 equipment is normally not available for maintenance, and the test conditions are as follows.

1. Clear and clear explanation

explanation	precise understanding
“IP68 = Permanently Waterproof”	❌ Anti-shock ability due to aging and decline, general demand for 2-3 years
“Owned IP68 Miyakoichiyan”	❌ Must see specific test participation number (like IP68-5m/1h vs IP68-1m/72h)
“IP67 marine wind power”	❌ Maritime holding high humidity + waves + rain, demand IP68 + preservative (C5-M)
“Using handheld IP68 swimming”	❌ Manual IP68 Normally limited to freshwater, stillness, short time, seawater/hot water/dynamic water flow failure

Sixth, how is the correct name IP68?

Root IEC 60529, IP68 required notes Specific test conditions, example:

IP68 (1.5 m, 30 min)

IP68 (5 m, 1 h)

IP68 per manufacturer’s specification

For young products, please refer to “IP68”, please note that there are no qualifiers, and provide test report when purchasing.

TST SEAL IP68 waterproof seal model core details

fineness	IP68 excellence
Depth of protection	Support long term, deep water operation
fusibility	Ability to maintain the tidal wet environment (under the sea, underground)
Business gateway	This is high end industrial, marine, energy equipment qualification.

✅ TST SEAL selection type construction:

Outside the daily life → IP66 feet;

Water bubbles → IP67;

Required for continuous flooding and high reliability → Required IP68, number of actual core tests.