NAPHTHALENE Resistant O-Rings and Seals

Naphtha, also known as naphthalene, is a colorless to pale yellow liquid hydrocarbon. It is a major component of crude oil and is widely used as a solvent in the rubber and plastics industries. Its most common uses are as a fuel blendstock, in paint and coating solvents, and in the production of other chemicals such as phthalates, phenol, and naphthalene sulfonates.

Common types of rubber failures when exposed to naphtha include swelling, cracking, hardening, and discoloration. Swelling occurs when the naphtha seeps into the rubber, causing it to expand and become deformable. Cracks may appear on the surface as the rubber is weakened by the naphtha. Over time, the rubber may become hard and brittle, leading to a decrease in flexibility and durability. Discoloration is also a common effect of naphtha, as the liquid can cause the rubber to turn yellow or darken in color.