POR-15

POR-15 has been making rust prevention chemistry since 1978, building a following in the vehicle restoration community for products that bond directly to rust and seal it permanently. The company's flagship three-step system — degreaser, metal prep, then the epoxy-based rust preventive coating — is a reference approach in the restoration world for addressing bare metal before any topcoat or undercoating.

The brand is positioned firmly in the enthusiast and professional restoration space, not the mass-market car care aisle. Products are formulated for durability over user convenience, which means stricter surface prep requirements and longer dry windows compared to consumer-grade aerosols.