The cheapest rubber end gasket materials are usually natural rubber and nitrile rubber (NBR), with natural rubber being the cheapest for most standard specifications.
According to market data, the unit price of ordinary natural rubber gaskets for small-batch purchases can be as low as 0.01 to 0.5 yuan per piece, especially for large-volume purchases. Nitrile rubber gaskets are slightly more expensive, but still within the economical range, commonly priced between 0.03 and 1.5 yuan per piece, depending on the specifications and purchase quantity.
In comparison:
Silicone rubber gaskets generally range in price from 0.2 yuan to 50 yuan per piece, with food-grade or high-temperature resistant models being even more expensive;
Fluororubber (FKM) gaskets, due to their excellent corrosion resistance and high-temperature resistance, are the most expensive, generally priced above 2.8 yuan per piece, with some special models reaching tens of yuan;
EPDM rubber gaskets are moderately priced, suitable for long-term outdoor use, and mostly range in price from 1.5 yuan to 7 yuan per piece.
Overall, considering only initial purchase costs, natural rubber is the most cost-effective choice, suitable for general sealing and shock absorption needs; however, it should be noted that it is not oil-resistant and is prone to aging, and long-term maintenance costs may be higher than those of high-performance materials.