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Door sealing strips are an indispensable key component of truck and trailer body sealing systems, installed at the contact point between the door and the door frame. Their primary function is to ensure a reliable seal when the door is closed, preventing air, dust, moisture, or light from penetrating the vehicle’s interior.
The important role of sealing strips
☑ Thermal Insulation
Effectively prevents external cold/hot air exchange, maintaining a stable temperature in the refrigerated vehicle and improving refrigeration efficiency.
☑ Waterproof and Dustproof
Blocks rainwater and dust from entering the vehicle’s interior, keeping goods clean and dry.
☑ Noise and Vibration Reduction
Reduces vibration and noise during door-to-door collisions, improving driving and transport comfort.
☑ Light Transmission Prevention and Sealing
Prevents light penetration and air leakage, enhancing the overall airtightness of the vehicle body.
Common Materials
| Material | Features |
|---|---|
| EPDM Rubber | Excellent resistance to weather, ozone, and temperature (-40℃~120℃); great flexibility and rebound. |
| PVC (Polyvinyl Chloride) | Cost-effective, adjustable hardness, good waterproofing; moderate weather resistance. |
| PVC + EPDM Composite | Combines the toughness of PVC and elasticity of EPDM; durable, flexible, and weather-resistant. |
For refrigerated trucks, sealing strips are particularly important for thermal insulation and energy conservation.
For dry cargo trucks, they play a crucial role in waterproofing, dustproofing, noise reduction, and enhancing vehicle durability.