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A door seal manufacturer produces sealing products in its own factory. A trading company normally purchases products from one or more factories and resells them to you. If you need a standard seal in a small quantity, a trading company may offer convenient sourcing. If you need a custom profile, tighter quality control, tooling development,…

A weather strip directly affects air leakage, water resistance, noise control, closing force, and long-term user experience. If you manufacture doors or windows at scale, you need a supplier that can keep dimensions, materials, hardness, and sealing performance consistent from one production batch to the next.  Here are the main factors you should evaluate before…

You need to know how that performance was tested, which standard was used, and what door configuration was covered by the test. A seal that works in one tested doorset cannot be assumed to provide the same rating in every door.  For importers, door manufacturers, distributors, and project contractors, understanding intumescent fire seal testing standards…

A custom can fit your existing groove, control closing force, cover an unusual gap, or match a specific door-frame design. To develop a reliable custom door seal, you should define the cross-section, groove dimensions, working gap, compression, hardness, tolerances, and material requirements. You should also agree on samples, tooling, MOQ, and lead time before mass…

The sealing strip affects air leakage, closing force, noise control, water resistance, and long-term customer satisfaction. Coated weather strips and TPE seals can both provide reliable perimeter sealing, but they use different structures.  This guide helps you select the right material, control sourcing risks, and avoid costly profile changes after production begins. Key Performance Differences…

Small gaps around a fire door can become paths for flames, hot gases, and smoke. An intumescent fire seal solves this problem by remaining compact during normal use and expanding when exposed to high heat. Expanded graphite is widely used in these seals because it can form a stable carbon barrier that fills the gap…

Choosing between different door weatherstripping types affects closing force, indoor noise, water resistance, dust control, energy efficiency, and long-term door performance. Coated polyurethane foam strips, TPE seals, and intumescent fire seals serve different purposes. By comparing their materials, profiles, and installation requirements, you can select a seal that fits your door. Main Door Weatherstripping Types…

An intumescent seal expands when exposed to fire, helping close the gap between a door and its frame. However, coated, PVC, and PVC+EVA seals behave differently during normal use. Their carrier materials affect flexibility, wear resistance, gap coverage, installation, and closing comfort.  By comparing all three structures, you can choose a seal that suits your…

In 2026, architectural sealing is becoming more closely connected with energy efficiency, material circularity, indoor comfort, and long-term building performance. Architects, door manufacturers, contractors, and distributors increasingly need products that reduce air leakage, remain flexible through changing weather, and support clearer sustainability goals. TPE seals and durable coated weather strips answer different parts of this…