Heil Trailer Premium Performance is on full display with our line of Insulated—Chemical stainless steel trailers. Designed with high-quality stainless steel and a proven two-piece barrel design, they are the most durable on the market. Our expert engineers developed a two-piece barrel design with a single circumferential seam using the industry’s widest sheet material. Fewer welds means less chance of porosity, leaks, issues, etc.