Coal tar is a thick, black liquid that is a by-product of the production of coke and coal gas from coal. It is composed primarily of aromatic hydrocarbons and is used in a variety of industries, including construction, pharmaceuticals, paper, and leather. Common uses include roofing, waterproofing, fuel, and production of dyes and pigments.
When rubber is exposed to coal tar, it can cause changes in elasticity, swelling, embrittlement, hardening, cracking, and discoloration of the material. In extreme cases, it can cause the rubber to completely break down and lose its structural integrity. Additionally, coal tar can penetrate rubber and cause it to become brittle over time. Protective coatings and proper storage of rubber materials can help to mitigate the effects of coal tar exposure.
Viton ® o-rings from Marco Rubber offer excellent compatibility with a range of chemicals, oils and resist high temperatures up to 400F. Viton ® is also known as FKM made of fluoroelastomer one of the most versatile and widely used sealing materials.
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