Weather Strip - China

Weather Strip A professional guide for window and door manufacturers and distributors As the core component of window and door seals, the material of Weather Strip directly affects the sealing performance, durability and cost.

Below are the characteristics, application scenarios and selection suggestions of 5 mainstream materials to help you accurately match your needs! 1 - PU Foam (Polyurethane foam sealing strip)

Characteristics

Lightweight and soft: closed cell foam structure, good compression resilience, suitable for filling irregular gaps.

Sound and heat insulation: porous structure effectively blocks sound and heat transfer.

Low cost: low raw material price, suitable for short-term or low-intensity demand scenarios.

Disadvantages

Poor weather resistance: easy to absorb water, aging, chalking and cracking for long-term outdoor use.

Low strength: weak tear resistance, easy to be deformed by frequent extrusion.

Applicable Scenarios

Temporary sealing of indoor doors and windows

Low-strength sound insulation needs (such as light partition)

2 - EPDM (EPDM rubber)

Characteristics

Excellent weather resistance: UV and ozone resistant, wide temperature range (-50℃~150℃).

High elasticity and durability: resistance to compression deformation, service life up to 10~15 years.

Chemical resistance: resistant to acids, alkalis and detergents, suitable for industrial environments.

Disadvantages

Higher cost: raw material and vulcanization process costs are higher than TPE/PVC.

Non-recyclable: traditional vulcanization process makes it difficult to recycle the material.

Applicable Scenarios

Automobile doors and windows, sunroof sealing

Outdoor building doors and windows (extreme climate areas)

3 - PVC (polyvinyl chloride)

Characteristics

Low price: Industrialized production is mature, with the lowest overall cost.

Easy to process: can be quickly molded by extrusion process to support complex structures.

Disadvantages

Poor environmental friendliness: Contains plasticizers (such as phthalates) and is prone to release harmful substances at high temperatures.

Hardening at low temperature: elasticity decreases below 0℃, easy to crack.

Applicable Scenarios

Low-cost interior door and window sealing (non-environmentally sensitive scenarios)

Short-term dust and moisture needs

4 - TPE (thermoplastic elastomer)

Characteristics

Environmentally friendly and recyclable: no plasticizers, REACH/ROHS compliant.

Balanced performance: temperature resistance -50℃~120℃, UV resistance, life span 5~8 years.

Flexible processing: supports injection molding and extrusion, color/hardness can be customized.

Disadvantages

High temperature resistance is weaker than EPDM: easy to soften in long-term environment higher than 120℃.

Applicable Scenarios

High-end doors and windows sealing (environmental certification requirements)

Dustproof and waterproof sealing for automobiles and home appliances

5 - Silicone

Characteristic

Best temperature resistance: -60℃~230℃ stable work, excellent flame retardant performance.

Food grade safety: non-toxic and odorless, can be used in medical and kitchen equipment.

Disadvantages

High cost: raw material price is 2~3 times of TPE.

Lower strength: tear resistance is weaker than EPDM/TPE.

Applicable Scenarios

High temperature equipment sealing (ovens, industrial machinery)

Food, medical grade sealing needs

Company Contact:

• Posted By: Hebei Cuishi Rubber Products Technology Co., Ltd

• Phone: 18632107215

• Address: Yang Er zhuang Trade Zone,Qinghe County,Hebei,China, Qinghe , Hebei , China

• Email:

• Website: https://www.cuishiseals.com/

• Business Description: Hebei Cuishi Rubber Products Technology Co., Ltd. It’s a modern and innovative technology company ,located in Hebei province near the capital Beijing ,specialized in the production of high-end door and window sealing strip.
  
  Our factory founded in the 1980s ,have independent import and export rights .
  
  We are a company integrating production, processing, import and export.