Zinc alloy door viewers (and door handles) are often considered better due to several key advantages related to their material properties:
- Durability and Strength: Zinc alloy is denser and heavier than aluminum alloy, which enhances its durability and structural integrity. This makes zinc alloy door viewers more resistant to wear and tear over time, ideal for frequent use and high-traffic areas.
- Corrosion Resistance: Zinc alloy offers excellent resistance to corrosion, making it suitable for environments with high humidity or exposure to the elements. This ensures the door viewer maintains its function and appearance longer without rusting or degrading.
- Cost-Effectiveness: Zinc alloy provides a good balance between quality and affordability. It is generally more cost-effective than aluminum alloy while still delivering strong performance and durability.
- Weight and Feel: The heavier weight of zinc alloy gives door viewers a solid, sturdy feel, which can translate to a perception of higher quality and better security. This weight also contributes to a comfortable and ergonomic user experience.
- Versatility in Finishes: Zinc alloy can be finished in various styles such as polished, brushed, or matte, allowing for aesthetic versatility to match different door designs.

In summary, zinc alloy door viewers are preferred because they combine strength, durability, corrosion resistance, and cost-effectiveness with a solid feel and versatile finishes, making them well-suited for both residential and commercial applications.