Hypalon, a brand name for chlorosulfonated polyethylene (CSPE), and neoprene, a type of synthetic rubber, are both materials used for their durability and resistance to environmental factors. 
Hypalon is known for its exceptional resistance to chemicals, UV light, and extreme temperatures, making it ideal for outdoor applications like inflatable boats, roofing membranes, and protective coatings. It is highly resistant to oxidation and ozone, which contributes to its longevity in harsh conditions. However, Hypalon production was discontinued in 2010, leading to the use of alternative materials with similar properties.
Neoprene, or polychloroprene, is valued for its flexibility, water resistance, and thermal insulation. It is commonly used in wetsuits, orthopedic braces, and industrial applications. Neoprene offers good resistance to oil, chemicals, and weathering, though it is generally less resistant to UV light and extreme temperatures compared to Hypalon. Neoprene is also more elastic, providing better stretch and recovery, which is beneficial in applications requiring flexibility.
In terms of durability, Hypalon generally outperforms neoprene in harsh environmental conditions due to its superior resistance to UV light and chemicals. However, neoprene's flexibility and insulation properties make it more suitable for applications requiring comfort and stretch. Cost-wise, neoprene is typically more affordable and widely available, given Hypalon's discontinuation.
Overall, the choice between Hypalon and neoprene depends on the specific requirements of the application, such as environmental exposure, flexibility needs, and budget constraints.