Secondary containment is one of the most technically demanding and financially rewarding applications in the polyurea coatings industry. Facilities that store hazardous chemicals, petroleum products, or other regulated substances are required by federal and state environmental regulations to have containment systems that can hold 110% of the largest container volume in the area. Polyurea is increasingly the material of choice for these systems—but the regulatory requirements, specification process, and installation details are complex enough that many applicators shy away from this market. That’s an opportunity for those who get the specialized training required.
Regulatory Framework
Secondary containment requirements for hazardous materials storage facilities are governed primarily by EPA regulations under the Resource Conservation and Recovery Act (RCRA) and the Spill Prevention, Control, and Countermeasure (SPCC) rule under the Clean Water Act. State-level regulations may be more stringent than federal requirements, and local fire codes may add additional requirements.
For polyurea applicators, the key regulatory requirements to understand include: volume requirements (110% of the largest container), impermeability standards (no measurable release to the environment for 72 hours), and inspection and documentation requirements. Specifying engineers and facility managers need assurance that your polyurea installation will meet these standards—which is why certification and proper documentation from the Coatings Academy Inspector program carry real value in this market.
System Specification Essentials
Not all polyurea formulations are appropriate for secondary containment. The system must be specified based on the specific chemicals to be contained. Key specification considerations include:
Chemical Resistance
Polyurea is generally resistant to dilute acids, alkalis, and many organic solvents, but resistance to specific chemicals must be verified against manufacturer chemical resistance data. Concentrated sulfuric acid, for instance, will degrade many polyurea formulations over time. Always request the manufacturer’s chemical resistance chart for the specific chemicals the containment system will be exposed to.
Minimum Thickness
Secondary containment polyurea systems are typically specified at a minimum of 60–125 dry mils (60–125 thousandths of an inch). Some engineered systems for aggressive chemical service specify 200+ mils. Thickness verification with a calibrated mil gauge is a required inspection step and must be documented.
Holiday Detection
A “holiday” is any pinhole, void, or discontinuity in the coating that would allow a liquid to penetrate to the substrate. Holiday detection testing using high-voltage (spark) testers or wet sponge testers is a standard requirement for secondary containment applications. Every holiday must be marked, repaired, and retested. Applicators who deliver a certified holiday-free installation command significant premium pricing.
Installation Best Practices
Cove Details
The transition from floor to wall is the most vulnerable area in any containment system. A 45-degree cove fillet at the floor/wall junction eliminates the 90-degree inside corner where coating bridging and potential voids occur. Cove fillets are typically formed with hydraulic cement or an epoxy mortar before the polyurea is applied, ensuring a continuous, supported membrane through the transition.
Penetration Details
Pipes, conduits, and structural columns that penetrate the containment membrane are potential leak paths. Each penetration requires a detail—typically a polyurea boot that terminates at a height above the containment fluid level, sealed with a compatible termination strip or additional polyurea. Missing or improper penetration details are among the most common deficiencies found in containment system inspections.
Pricing Secondary Containment Work
Secondary containment polyurea work should be priced substantially higher than conventional flooring—the regulatory stakes, technical complexity, and documentation requirements justify it. Typical secondary containment polyurea projects price at $8–$25 per square foot depending on system thickness, chemical service requirements, and project complexity. A well-run 5,000 square foot secondary containment installation can generate $40,000–$125,000 in revenue.
To pursue this market effectively, you need both the technical competence that comes from our Polyurea Applicator Certification and the inspection and documentation knowledge covered in our Inspector Certification program. Contact our team to discuss how to build the credentials needed for this high-value market segment.
