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Weather stripping is a material or device used to seal gaps around windows, doors, and other openings in the exterior of a building. It is designed to prevent drafts, water, dust, and other elements from entering the building. Weather stripping can be made from a variety of materials such as rubber, foam, vinyl, or felt.
There are different types of weather stripping, including:
Door weather stripping: It is used to seal gaps around the edges of a door to prevent drafts, water, and dust from entering the building.
Window weather stripping: It is used to seal gaps around the edges of a window to prevent drafts and water from entering the building.
V-strip weather stripping: It is a thin, flexible metal strip that is applied to the top and bottom of a door to seal the gap between the door and the door frame.
Self-adhesive weather stripping: It is a strip of weather stripping with an adhesive backing that can be applied to the edges of a door or window to seal gaps.
Weatherstripping is a relatively inexpensive and easy way to improve energy efficiency and reduce energy costs. It can also improve the overall comfort of a building by reducing drafts, noise, and other unwanted elements.
Fortex(Shanghai) Industrial Co., Ltd.

About Us

Fortex(Shanghai) Industrial Co., Ltd is China Weather strip Manufacturers and Weather strip Factory. Established in 2021, FORTEX is a manufacturer and exporter specialized in the design, development and production of Weather strip. We are located in Shanghai with convenient transportation access. All of our products comply with international quality standards and are greatly appreciated in a variety of different markets throughout the world.
We have more than 30 employees, annual sales over USD 3 million, and currently export 50% of our products worldwide. Our well-equipped facilities and sophisticated quality control throughout all stages of production enable us to guarantee total customer satisfaction.
If you are interested in any of our products or would like to discuss a custom order, please feel free to contact us. We are looking forward to forming successful business relationships with new clients around the world in the near future.
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From The Blog

Weather strip Industry Knowledge Extension

Guide to building door and window sealing: How to choose durable Weather Strip materials?

Choosing durable door and window sealing strips (Weather Strip) is a key step to improve the sound insulation, thermal insulation and waterproof performance of buildings. The following is a practical guide based on material characteristics, usage scenarios and installation and maintenance:

1. Common sealing strip types and applicable scenarios

EPDM rubber strips
Features: excellent weather resistance (-40℃~120℃), UV resistance, ozone resistance, soft and elastic, life span of 5-10 years.
Applicable: outdoor doors and windows (especially in extreme climate areas), such as sliding windows and casement windows.
Note: Avoid contact with oil solvents, which may cause expansion.

Silicone sealing strips
Features: high temperature resistance (-60℃~200℃), non-toxic and environmentally friendly, but the price is higher.
Applicable: high temperature environment (such as sun room), food and medical places.
Upgrade option: Foamed silicone strips (with air holes) can enhance the sound insulation effect.

TPE/TPV thermoplastic elastomer
Features: recyclable, wide hardness range, good wear resistance, but long-term compression may deform.
Applicable: Doors that are frequently opened and closed (such as entrance doors), it is recommended to choose a design with reinforcement ribs.

Foam sealing strip (PE/EVA)
Features: cheap, easy to install, but easy to age (lifespan 1-3 years).
Applicable: temporary sealing or indoor windows with limited budget.
Metal edging sealing strip (such as stainless steel + rubber)
Features: anti-mechanical damage, beautiful.
Applicable: high-end doors and windows or exterior doors of commercial buildings.

2. Key purchasing indicators

Compression rebound rate: ≥70% of the sealing strip can be restored to its original state for a long time (test method: observe the rebound after flattening for 24 hours).
Anti-aging level: Choose UL certified or GB/T 19250 standard ≥P3 level products.
Waterproof performance: EPDM and silicone have a water absorption rate of <1%, which is better than foam materials.

Adaptable gap:
1-3mm gap: choose thin self-adhesive sealing strip (thickness 2-3mm).
3-5mm gap: it is recommended to use D-type or P-type hollow sealing strip.
>5mm gap: use magnetic sealing strip + bottom windshield strip in combination.

3. Installation skills and maintenance

Pretreatment: clean the surface and apply special primer (such as 3M Primer 94), which can increase the adhesive strength of the strip by more than 50%.
Corner treatment: heat and soften with a hair dryer after 45° cutting, and then press to avoid warping.
Regular maintenance: use silicone oil to maintain the rubber strip every quarter to prevent cracking; the foam strip needs to be replaced in time after aging.

4. Pit avoidance guide

Avoid low-priced PVC materials: harden and crack in winter, and plasticizers may precipitate in summer to pollute the wall.
Use adhesive-backed sealing strips with caution: long-term use is easy to debond, and slot or nail installation is preferred.

Solutions for special needs:
Sound insulation needs: choose closed-cell foam rubber with a density of ≥0.6g/cm³ + multi-layer sealing design.
Anti-theft needs: match with metal-reinforced sealing strips (such as aluminum core TPE).

Recommended combination solutions:
Northern cold regions: EPDM double-layer sealing (outer wool strip + inner D-shaped strip).
Coastal high humidity environment: silicone sealing strip + stainless steel buckle fixing.