Full Adhesive Solution for Railway Transportation Industry
The railway transportation solution is applicable to high-speed trains, urban metros, intercity trams and heavy locomotives, and all application scenarios are divided into six modules: body assembly, window system, interior and floor components, bogies and running devices, on-board electrical control, underbody piping, and maintenance and repair. The bonding materials are classified into six categories based on their functions: structural adhesives, elastic sealants, thermal conductive sealants, thread locking agents, flame-retardant and anti-corrosion coatings, and repair fillers. All formulations are adapted to the harsh railway operating environment: extreme low temperatures as low as -40°C, high temperatures up to 120°C, coastal areas with C5-M grade strong salt spray, northwest regions with intense ultraviolet radiation, alternating aerodynamic pressures at 350 km/h, and millions of cycles of vibration. All materials comply with railway mandatory standards, including EN 45545 fire performance, TB/T 3237 low-VOC requirements, and TB/T 3138 low-smoke flame-retardant standards. 1. The bonding agent for the vehicle assembly (the core structure of lightweight design) needs to strike a balance between lightweight design, anti-fatigue performance, and compatibility with different substrates.
Railway Transportation: Drawing 1—Car Body Assembly
Sectional structure of the vehicle body assembly: Side wall of the high-speed train body + Roof + Cross-sectional view of the underframe
Label No.
English Position Mark
Adhesive Category
1
Underframe Main Beam Bonding
Toughened Railway Two-Part Epoxy
2
Roof & Side Skin Splicing
Aliphatic PU Structural Adhesive / MS Modified Silane
3
Locomotive Nose Shell Bonding
Epoxy+Flexible PU Compound Adhesive
4
Weld Seam Sealing
MS Modified Silane Sealant / Polysulfide Sealant
5
Aluminum Honeycomb Panel Lamination
MMA Acrylic Adhesive / Low-Temperature Epoxy
Attached Table for Drawing 1
Adhesive Model
Working Temp
Railway Standard
JOME Model
Araldite 2047
-40℃~120℃
EN45545 HL2, TB/T3138
EP-Rail01
Sika 221
-50℃~90℃
TB/T3260, QUV 5000h qualified
PU-Rail
Polysulfide industrial grade
-35℃~110℃
Salt spray ≥1000h
MS-680
Plexus MMA
-40℃~100℃
V0 flame retardant
MMA-R Series
Drawing 2：Window & Door & Gangway System
The sectional structure of the vehicle windows, doors and passage: side windows of the EMU + sliding doors + longitudinal section of the passage
Label No.
English Position Mark
Adhesive Category
1
Windshield Glass Bonding
Railway One-Component PU Windshield Adhesive
2
Door Frame Edge Sealing
MS Elastic Sealant
3
Door Hinge Thread Locking
Removable Medium-Strength Anaerobic Thread Locker
4
Corrugated Gangway Bellows Bonding
Hydrolysis-Resistant PU Sealant
5
Gangway Air Duct Sealing
Halogen-Free Flame-Retardant Silicone Sealant
6
Threshold Step Sealing
Wear-Resistant PU Sealant
Attached Table for Drawing 2
Adhesive Model
Working Temp
Railway Standard
JOME Model
Sika 221
-45℃~95℃
EN45545 HL2, TB/T3237
PU-Wind
General medium anaerobic
-40℃~130℃
Oil resistance standard TB/T2843
Anaerobic M24
Flame retardant silicone
-60℃~180℃
Low smoke halogen free
RTV-Rail-FR
Drawing 3：Interior System
Interior assembly cross-sectional structure of the vehicle: Passenger compartment side wall interior panel + luggage rack + insulation layer cross-section
English Position Mark
Adhesive Category
Ceiling & Side Decor Panel Bonding
Single-Component MS Sealant / Fast-Curing MMA
Handrail & Seat Base Bonding
Flexible PU Adhesive
Thermal Insulation Cotton Fixing
Low-VOC Flame-Retardant Waterborne Spray Adhesive
Maintenance Hatch Sealing
Flame-Retardant Food-Grade RTV Silicone
Skirting Board Bonding
Environment-Friendly MS Sealant
Attached Table for Drawing 3
Adhesive Model
Working Temp
Railway Standard
JOME Model
Waterborne Henkel rail glue
0℃~75℃
VOC≤50g/L TB/T3237
Water-A Rail
General interior MS
-40℃~85℃
UL94 V0
MS-Interior
Food-grade silicone
-50℃~170℃
Non-toxic low emission
RTV-Food-FR
Drawing 4：Bogie & Running Gear
Sectional structure of the running gear of the bogie: wheelset + frame + brake disc + side view sectional view of axle box
Label No.
English Position Mark
Adhesive Category
1
Brake Disc & Brake Pad Backplate Bonding
High-Temperature Inorganic Ceramic Adhesive
2
Bogie Heavy Bolt Locking
High-Strength Red Anaerobic Thread Locker + Anti-Seize Grease
3
Axle & Bearing Retention
Bearing Special Anaerobic Retaining Compound
4
Underbody Weld Three-Proof Sealing
Three-Proof PU Sealant
5
Brake Hydraulic Thread Sealing
Oil-Resistant Anaerobic Sealant + PTFE Paste
Attached Table for Drawing 4
Adhesive Model
Working Temp
Railway Standard
JOME Model
High temp ceramic adhesive
-40℃~700℃ instant peak
Anti-thermal shock rail standard
Ceramic-Brake01
High strength red anaerobic
-55℃~150℃
Vibration fatigue 5 million cycles
Anaerobic High Red
Bearing retaining glue
-40℃~140℃
TB/T anti-runout test
Retain-Bearing
Drawing 5：On-Board Electrical & Control Cabinet
Sectional structure of the vehicle-mounted electrical control cabinet: Inverter cabinet body + IGBT module + circuit board section
Label No.
English Position Mark
Adhesive Category
1
IGBT Module Thermal Interface
Thermally Conductive Gel / Thermally Conductive Epoxy
Intumescent Fire Sealant + Flame-Retardant Silicone
4
Wire Harness Connector Waterproof
PU Potting Adhesive / Silicone Sealant
5
Air Conditioner Electrical Box Sealing
Wide-Temp RTV Silicone Sealant
Attached Table for Drawing 5
Adhesive Model
Working Temp
Railway Standard
JOME Model
Thermal conductive epoxy
-40℃~130℃
Insulation EN45545
Thermal-EP Rail
Addition silicone potting
-45℃~135℃
Anti-condensation metro standard
Silicone-Pot-FR
Intumescent fire glue
-30℃~200℃
Fire expansion test HL3
Fire-Seal Rail
Drawing 6：Floor System
Floor system sectional drawing: Sectional structure of high-speed rail / subway floor – multi-layer explosion division (floor fabric + honeycomb base plate + bottom support)
Label No.
English Position Mark
Adhesive Category
1
PVC Floor Cover Bonding
Zero-Solvent Waterborne Acrylic Adhesive
2
Honeycomb Floor Skeleton Bonding
High-Toughness Epoxy Structural Adhesive
3
Floor Edge Gap Sealing
Low-Smoke Flame-Retardant MS Sealant
4
Floor & Sidewall Joint Sealing
Wear-Resistant Elastic MS Sealant
Attached Table for Drawing 6
Adhesive Model
Working Temp
Railway Standard
JOME Model
Henkel waterborne floor glue
5℃~80℃
TB/T3237 low VOC
Water-A Rail
Rail toughened epoxy
-40℃~115℃
Compression resistance test
EP-Floor
Flame retardant MS
-40℃~90℃
Low smoke density MS standard
MS-Floor-FR
Drawing 7：Under-Car Pipeline & HVAC
Label No.
English Position Mark
Adhesive Category
1
Air-Conditioner Base Roof Bonding
Weather-Resistant MS Sealant
2
Ventilation Air Duct Assembly
Flame-Retardant Epoxy + Silicone Sealant
3
Under-Car Cable Hole Sealing
Three-Proof Polyurethane Sealant
4
Pipeline Thread Anti-Leakage
Anaerobic Thread Sealant
5
Pipeline Bracket Bonding
Modified Epoxy Adhesive
Attached Table for Drawing 7
Adhesive Model
Working Temp
Railway Standard
JOME Model
Outdoor weather MS
-50℃~90℃
QUV anti-aging 5000h
MS-Outdoor Rail
General pipe anaerobic
-40℃~125℃
Hydraulic oil resistance
Anaerobic Pipe Seal
Three-proof PU
-40℃~100℃
Salt spray 1000h mildew resistance
PU-ThreeProof
Separate joining and sealing duties across the vehicle
For the railway transportation industry, adhesive selection needs to follow the individual joint rather than a vehicle-wide material label. A window bond, an interior panel, a threaded connection and a protected control assembly have different load paths and service needs. Why assume that a formulation chosen for a housing seam can also carry a structural load? Identify the substrates and their finishes, expected relative movement and access needed for inspection or repair. It’s useful to separate attachment from sealing: a joint can remain attached while a discontinuous bead leaves a moisture path. Project-specific fire, smoke and other material requirements need applicable evidence for the selected material and intended use; a general adhesive-family description does not establish them. The structural bonding adhesive category supports discussion of load-bearing joints, with the joint design and preparation route included.
Include aged interfaces and repair conditions in the trial
Bonding trials for the railway transportation industry should reproduce the surface preparation and assembly sequence used on the component. Painted metal, coated glass and composite surfaces need evaluation as finished interfaces rather than substitutes made from bare laboratory materials. After cure, check the intended mechanical or sealing function and inspect edge coverage, bead continuity and access to service features. Repeat relevant checks following the environmental and mechanical conditioning defined for the application. Record whether separation occurs within the adhesive, at a finish or within the substrate. Where maintenance involves replacing a component, evaluate removal and rebonding on the resulting surface; a previously bonded area can differ from a new part. The industrial sealing material category provides a separate starting point for seam and gasket duties, while vehicle-level performance remains tied to the complete assembly and its applicable project assessment.
