NOTE This standard governs high-performance protective coating systems applied to interior and exterior building surfaces in service environments more demanding than those served by conventional architectural paint. (1.1)

NOTE High-performance coatings are distinguished from decorative paint by their resin chemistry and their performance role: they resist corrosion, chemical attack, abrasion, or aggressive washdown rather than merely providing color and sheen. They are specified where a coating failure would compromise the substrate (steel corrosion, concrete chemical erosion) or the operation (loss of cleanability in a food or pharmaceutical area, containment breach in a chemical zone). (1.2)

NOTE Covered substrates are concrete floors and walls, masonry and CMU, structural and galvanized steel, and gypsum board. (1.3)

NOTE Covered system types are multi-coat epoxy (solvent-borne and waterborne), aliphatic polyurethane topcoats, spray-applied polyurea, organic and inorganic zinc-rich primers, high-build epoxy mastic, coal tar epoxy, vinyl ester linings, and fluoropolymer finishes. (1.4)

NOTE This standard applies to both new construction and renovation. (1.5)

NOTE Resinous flooring boundary (1.6)

NOTE Self-leveling, slurry, and broadcast-aggregate epoxy floor build-ups are floor topping products, not protective coatings, and are governed by Resinous Flooring rather than this standard. (1.6.1)

NOTE Thin-film protective coatings applied to floors (sealers and traffic coatings under ~20 mils that do not build a wearing surface) remain within this standard. (1.6.2)

NOTE Other exclusions (1.7)

NOTE Standard decorative latex and alkyd painting on architectural surfaces is governed by Interior Painting and Exterior Painting. (1.7.1)

NOTE Intumescent and cementitious fireproofing coatings, roof coatings, waterproofing membranes, and protective coatings on structural steel within fire-rated assemblies are outside this standard and are governed by their respective fireproofing, roofing, and waterproofing sections. (1.7.2)

NOTE SSPC and NACE merged into AMPP (Association for Materials Protection and Performance) in 2021; the standards below are now published by AMPP but retain their original SSPC and NACE designation numbers, both of which remain in wide industry use. (2.3)

NOTE Action submittals (3.1)

NOTE Informational submittals (3.2)

NOTE Closeout submittals (3.3)

NOTE The most common high-performance coating failures - delamination, intercoat adhesion loss, and undercure - originate in surface preparation, substrate moisture, ambient conditions, and missed recoat windows rather than in the coating material itself. (4.1)

NOTE Because these defects are usually invisible until the coating is in service, this standard relies on hold points: inspection sign-offs that must be obtained before the next operation proceeds. Retroactive correction of a surface-prep or DFT deficiency generally requires complete removal and reapplication of the affected system. (4.2)

NOTE Applicator qualifications (4.3)

NOTE Mock-up (4.4)

NOTE Hold points (4.5)

NOTE The single most important specification decision is matching the coating system to the actual chemical and physical exposure. Over-specifying wastes cost; under-specifying causes premature failure that is expensive to remediate in an occupied or operating facility. (5.1)

NOTE Chemical exposure class (5.2)

NOTE Mild service covers periodic water washdown and occasional mild detergent (mechanical rooms, general utility areas). Moderate service covers routine cleaning chemicals and dilute acids or alkalis (food-service, laboratories). Severe service covers concentrated acids, solvents, fuels, or immersion (secondary containment, process areas, wastewater contact). (5.2.1)

NOTE UV exposure and color retention (5.3)

NOTE Aromatic polyurethanes and epoxies chalk and yellow under ultraviolet light, often within months on exterior or skylight-exposed surfaces; aliphatic polyurethanes and fluoropolymers retain color and gloss. (5.3.1)

NOTE Specialty service requirements (5.4)

NOTE Fire performance (5.5)

NOTE A high-performance system is defined by its coats and their roles: a primer that bonds to and protects the substrate, optional intermediate coats that build film thickness and barrier resistance, and a finish coat that provides appearance, UV resistance, and cleanability. The system type drives substrate preparation, DFT, and cure requirements. (6.1)

NOTE System type (6.2)

NOTE Common system types and their primary applications: (6.2.1)

NOTE Substrate (6.3)

NOTE The substrate type drives primer chemistry: epoxy primers bond to blast-cleaned steel and prepared concrete, zinc-rich primers require near-white blasted steel, and galvanized steel requires a primer formulated for adhesion to zinc. (6.3.1)

NOTE Finish gloss (6.4)

NOTE Higher gloss generally cleans more easily and resists chemical staining better, while lower gloss hides surface irregularities; semi-gloss is the common default for food-service and cleanroom areas, with full gloss where maximum cleanability is required. (6.4.1)

NOTE Finish color (6.5)

NOTE Surface preparation is the foundation of coating performance: cleanliness removes contaminants that block adhesion, and profile (anchor pattern or concrete texture) gives the coating mechanical grip. Inadequate preparation is the leading cause of field failure and cannot be corrected after coating. (7.1)

NOTE Solvent cleaning of steel (7.2)

NOTE Oils, greases, and soluble contaminants prevent both proper blast profile and adhesion, and remain even after abrasive blasting if not first removed. (7.2.1)

NOTE Abrasive blasting of steel (7.3)

NOTE Commercial blast (SSPC-SP 6) is the minimum cleanliness for epoxy primer on structural steel in mild service; near-white blast (SSPC-SP 10) is required for high-build epoxy, zinc-rich primer, and immersion or severe service. (7.3.1)

NOTE Concrete surface profile (7.4)

NOTE Concrete must be mechanically profiled - by shot blast or diamond grind - to expose a clean, sound, textured surface; a smooth or laitance-covered slab will not hold a resin coating. (7.4.1)

NOTE CSP is a frequent failure point because specifications call out a profile number without naming the test method or the allowed preparation method, and contractors then substitute light grinding that yields only CSP 1-2 where CSP 3 was needed. (7.4.2)

NOTE Excess moisture in or behind concrete is the single most common cause of epoxy delamination on slab-on-grade, because vapor pressure drives the coating off the substrate from below. Concrete moisture testing must be a contractual hold point, not an optional check. (8.1)

NOTE Concrete moisture testing (8.2)

NOTE Slab RH (ASTM F2170) and MVER (ASTM F1869) limits are manufacturer-specific; 75% RH and 3 lb/1000 ft²/24 hr are conservative defaults, while some MVB epoxy primers tolerate 8-10 lb. The acceptance value shall be taken from the specified primer's TDS. (8.3)

NOTE Dry film thickness governs barrier performance: too thin and the coating fails to resist chemical penetration or corrosion; too thick and solvent-borne coatings can trap solvent, sag, or mud-crack. DFT must be specified per coat and for the total system, with a measurement and acceptance procedure. (9.1)

NOTE DFT specification (9.2)

NOTE Total system DFT scales with service severity: mild interior service is typically 3-5 mils total, moderate chemical service 6-10 mils, severe chemical or immersion service 12-20 mils, and polyurea lining 40-125 mils. (9.2.1)

NOTE DFT measurement (9.3)

NOTE Ambient and substrate conditions at the time of application determine whether the coating cures to its rated properties. Epoxy applied below its minimum temperature remains tacky, never fully cures, and loses most of its chemical resistance; coating applied to a substrate near or below the dew point traps condensed moisture under the film. (10.1)

NOTE Ambient conditions (10.2)

NOTE Most solvent-borne and waterborne epoxies require a minimum ambient and substrate temperature of 50°F; some low-temperature formulations are rated to 25°F. The 50°F minimum is the default unless a low-temperature product is specified for cold-weather work. (10.2.1)

NOTE Recoat windows (10.3)

NOTE Each coat has a minimum recoat time (so the underlying coat is firm enough) and a maximum recoat time (beyond which the cured surface must be abraded to restore intercoat adhesion). Topcoats applied beyond the maximum recoat window can delaminate with no visible sign until the coating is in service. (10.3.1)

NOTE Solvent-borne epoxy intercoat recoat is typically 8-24 hours minimum and 7 days maximum at 77°F; aliphatic urethane over epoxy intermediate is typically 8-24 hours minimum. The recoat window shall be taken from each product's TDS. (10.3.2)

NOTE Cure before service (10.4)

NOTE Coatings for immersion or chemical service require a full chemical cure - typically 7 days at 77°F - before liquid contact; some polyureas reach service cure within 24 hours. (10.4.1)

NOTE Field testing confirms that the installed system, not merely the can of material, meets the specified performance. Adhesion and DFT are verified on every project; abrasion, corrosion, and flexibility are typically qualification tests submitted with product data. (11.1)

NOTE Field adhesion (11.2)

NOTE Qualification testing (11.3)

NOTE Coating VOC content is regulated federally and, in many jurisdictions, more strictly by the state. Specifying a solvent-borne epoxy that exceeds the local limit, or that creates an odor or ventilation problem in an occupied building, is a common and avoidable error. (12.1)

NOTE VOC compliance (12.2)

NOTE The federal AIM rule (40 CFR Part 59) limits industrial maintenance coatings to 250 g/L; CARB and OTC states limit many categories more strictly, to 100-150 g/L for flat coatings. (12.2.1)

NOTE High-performance coatings rarely stand alone: steel may arrive shop-primed under another section, and adjacent finishes are governed by separate standards. Compatibility gaps between shop primer and field finish are a frequent source of adhesion failure. (13.1)

NOTE Shop-primed steel (13.2)

NOTE Where structural or fabricated steel is shop-primed under Metal Fabrications, the shop primer must be compatible with the field finish system specified here, and the compatibility shall be confirmed in both sections. (13.2.1)

NOTE Adjacent finishes (13.3)

NOTE Decorative architectural painting adjacent to high-performance-coated surfaces is governed by Interior Painting and Exterior Painting; resinous floor toppings meeting coated walls are governed by Resinous Flooring. (13.3.1)

NOTE Two-component coatings have limited shelf life and are sensitive to temperature; off-spec or improperly stored material cures unpredictably and voids the warranty. (14.1)

NOTE A reserve of the exact finish material lets the Owner touch up damage without a color or batch mismatch, which is otherwise difficult once the original lot is exhausted. (16.1)