Urea dispensers are manufactured using materials specifically compatible with diesel exhaust fluid. DEF is mildly corrosive and can react with certain metals, so components must be carefully selected to avoid chemical degradation.
Common materials include stainless steel, high-density polyethylene (HDPE), and specially coated aluminum. Seals and gaskets are typically made from urea-resistant elastomers to prevent leaks and material breakdown over time.
Using proper materials ensures long service life, reliable performance, and DEF purity. High-quality construction reduces maintenance requirements and protects both vehicles and dispensing systems.