相比国内防火封堵，UL防火封堵承包商认证具有以下特色：

Compared with domestic fire sealing, UL fire sealing contractor certification has the following characteristics:

Strict product and service standards: UL certification requires products and services to meet the most stringent international safety standards, thus ensuring product quality and safety.
Whole-process quality control: UL certification requires that the whole process of fire prevention and sealing products and services must be subject to quality control, from material selection to installation and construction must meet the requirements, ensuring the reliability and stability of products and services.
International certification standards: UL fire sealing contractor certification is an internationally recognized safety certification. Customers can obtain internationally common safety certification, thereby enhancing the market competitiveness of products.
In short, UL fire sealing contractor certification is a strict international safety standard, which can provide customers with more reliable, safer and better fire sealing products and services, and provide customers with more efficient risk control solutions.