How to Distinguish Between Asphalt and Butyl Rubber Vibration Damping Sheets?

[Dave]

Asphalt has a strong asphalt odor, while butyl rubber has little to no noticeable smell. You can identify them by heating with a flame and smelling. More relevant information is as follows: 1. Butyl Rubber: Butyl rubber is indeed an excellent soundproofing material; however, due to its extensive use in tire and pharmaceutical product manufacturing, its material cost has risen significantly. For well-known brands like Dynamat, to ensure brand reputation and product quality, they continue to use butyl rubber as the raw material despite the high cost. However, for brands that cater to consumers seeking low-cost options as their "core competitive value," they certainly will not use the more expensive butyl rubber as their product material. 2. Butyl Recycled Rubber: Made from butyl inner tubes through desulfurization and refining, it can retain some characteristics of original butyl rubber to a certain extent and is cheaper than original butyl rubber. However, its energy absorption performance is significantly inferior to butyl rubber, and its adhesive strength is also weaker. Therefore, compared to original butyl rubber, butyl recycled rubber can only be considered a second-choice material for vibration damping.