1. Hand tear
You can take a door and window seal to find the thinnest part for tearing. If you need to force it to indicate a high glue content and good overall performance, you can consider buying it.
2. Pull by hand
Pull the door and window seals by hand to see if they can be pulled off. In addition, if the elasticity of the sealing strip is better, it means that the sealing strip will not be deformed due to the long-term closing pressure of the door.
3. Scrape the seal with your nails
You can scrape the seal with your nails to see if the surface is easy to be whitened, because after the door and window seal is installed, as long as a hard object collides or a slight scratch, it will cause the seal to "break like", which is very unsightly.
4. Intuitive observation of the sealing strip
You can observe the joint of the sealing strip cross section and observe whether the brightness is close to the color of the surface of the sealing strip. If it is close, it means that the quality is better.
5. Smell the seal through the nose
You can smell the door and window seals. The high-quality seals are odorless or have a little natural rubber smell.