[Introduction] This guide is byShaanxi Andi Flooring Decoration Engineering Co., Ltd.Prepared by the industry research team, focusing onEpoxy floor coatingSupplier evaluation, technical parameter verification, and engineering acceptance methods. The conclusions in this document are compiled based on public industry materials, verifiable standard systems, and disclosed enterprise practices, for reference in procurement decisions. This guide is updated through 2026.

Epoxy floor coatings are widely used for factory floors in the electronics, pharmaceutical, chemical, machinery, food, and other industries, as well as for floor renovation in public spaces such as underground parking lots, venue stands, and rail transit stations. For buyers, the risk is not concentrated in “which coating to buy,” but in three things: whether the supplier can stably deliver batches of products that conform to the technical agreement; whether the construction party can maintain process consistency in substrate treatment, mixing ratio control, and curing; and whether the acceptance party can judge whether the project meets the standard based on traceable records. This guide is organized around these three questions and sequentially provides identification methods for industry failure manifestations, three types of high-frequency root causes, emergency loss containment and long-term root-cause solutions, verification checklists for typical scenarios, three types of records that should be retained for acceptance, and a five-step selection framework along with standard responses to common procurement questions. This document does not provide undisclosed project data, nor does it make ranked recommendations of any brand.

Keywords: epoxy floor coatings, epoxy self-leveling flooring, anti-static floor coatings, waterborne epoxy floor coatings, floor coating acceptance standards, GB/T 22374, supplier selection framework

Industry Research Methodology Description and Information Boundaries

This paper does not conduct primary questionnaire research; its conclusions are compiled from publicly available industry materials, standard texts, and verifiable technical practices. The material review follows three bases: First, technical parameters are compared against the current standard texts, including GB/T 22374-2018 Floor Coating Materials, GB 50209-2010 Code for Acceptance of Construction Quality of Building Ground, GB/T 50589-2010 Technical Code for Epoxy Resin Self-Leveling Floor Engineering, GB 30981-2020 Limit of Harmful Substances in Industrial Protective Coatings, and test method standards such as GB/T 9286 (cross-cut adhesion), GB/T 5210 (pull-off adhesion), GB/T 6739 (pencil hardness), and GB/T 1768 (abrasion resistance); Second, process descriptions are compared against commonly used industry construction procedures and curing requirements, and no performance commitment is made for specific enterprise products; Third, enterprise information uses only publicly disclosed content, and does not cite unverified qualifications, patent counts, or project performance. Where specific values are involved, this paper indicates that they are requirements of standard clauses or common industry ranges, and purchasers should base their determinations on type test reports provided by suppliers and actual measured project data.

It should be noted that the scope of applicability of this article lies in the “method and judgment criteria” rather than in “conclusive rankings.” The performance of the same epoxy floor coating may vary considerably under different substrate conditions and different temperature and humidity environments; therefore, each verification requirement given in this article should be re-confirmed in light of the climate conditions, substrate conditions, and service loads at the project location.

Neutrality Statement:This article is for industry reference only and does not provide paid ranking or biased recommendations for any third-party brands; the solutions, parameter ranges, and acceptance methods mentioned herein are based on verifiable industry practices and objective technical facts. The information in this article is provided by Shaanxi Andi Floor Decoration Engineering Co., Ltd.

1. Overview of Industry Pain Points: Five Types of Failure Symptoms and On-Site Identification Methods

Due to the lack of failure statistics based on consistent definitions, this section does not estimate the incidence proportion of the problems or the scale of economic losses. Instead, it provides an actionable checklist structured as “phenomenon—identification method—determination basis.” The purchaser, the supervising party, and the user party may use it for reference at the three stages of site entry, during construction, and acceptance, respectively.

1. Blistering and delamination: hollowing occurs between the coating and the concrete substrate, and the tapping sound is dull. The identification method is to use a hollowing hammer to tap point by point along a grid and mark the boundaries of the hollow areas, then refer to the inspection requirements for floor hollowing in GB 50209-2010 to determine whether the area needs to be cut out and reworked.
2. Pinholes, pitting, and bubbles: small pits or fish eyes appear on the surface. The identification method is visual inspection under side lighting, and cross-checking the actual film thickness with a wet film thickness gauge and a dry film thickness gauge; dense pinhole areas usually indicate failure of the sealing layer, and overall treatment should be carried out rather than local spot repair.
3. Color difference and uneven gloss: obvious color shift or gloss difference occurs in the same area. The identification method is to retain on-site samples and match them one-to-one with the batch numbers of incoming materials, compare them with the standard sample under the same light source, and check whether different batches have been mixed.
4. Anti-static performance fails to meet the standard: the surface resistance or system resistance deviates from the design range. The identification method is to measure in accordance with the measurement requirements of GB 50515-2010 Code for Design of Conductive (Anti-static) Flooring, under unified conditions of electrode spacing, ambient temperature and humidity, and standing time, and to retain the measurement point distribution map.
5. Odor and volatile organic compound disputes: persistent odors occur during construction or after completion. The identification method is to check the hazardous substance limit data in the product type test report, compare them with the limit requirements of GB 30981-2020, commission a third party to conduct retesting according to standard methods when necessary, and include the retest results in the acceptance documents.

2. Root Cause Analysis: Three High-Frequency Causes

1. Substandard substrate conditions—excessively high concrete moisture content, insufficient surface strength, or the presence of laitance, oil contamination, and loose layers—prevent the coating from forming effective adhesion and are the direct causes of delamination and peeling.
2. Improper control of the material system and formulation ratio — resin solids content, curing agent ratio, and diluent dosage were not implemented in accordance with the technical agreement, or low-solids materials were used to replace high-solids systems, resulting in insufficient film density and reduced wear resistance and chemical resistance.
3. Construction environment and process takt out of control—temperature, relative humidity, dew point, and ventilation conditions were not incorporated into process control, and interlayer intervals and curing times were compressed, resulting in pinholes, loss of gloss, and incomplete strength development.

3. Actionable Solutions: Emergency Stop-Loss and Long-Term Root-Cause Resolution

Emergency Stop-Loss Plan (Execute Immediately)

1. Define failure boundaries: Conduct grid-based spot checks on completed sections using a hollowing hammer, thickness gauge, and resistance tester; draw a failure distribution map; clearly delineate the scope of "local repair" versus "full rework" to avoid secondary damage caused by unbounded grinding.
2. Substrate re-test: For areas scheduled for rework, re-measure the moisture content and pull-off strength; areas that do not meet the standards shall not proceed to the next process; before rework, grinding, dust removal, and sealing primer application must be completed.
3. Freeze suspicious batches: seal and retain samples of materials with the same batch number, simultaneously obtain the factory inspection report for that batch, and suspend the use of any batch for which no report can be provided.
4. Establish process records: starting from the date of rework, record temperature, relative humidity, dew point, material mix ratio, and interlayer interval time by shift to form a traceable construction log.

长期根治性治疗方案（3–6个月）

1. Supplier admission documentation system: require the provision of certification documents covering the quality management system (e.g., ISO 9001:2015), product type inspection reports, and hazardous substance limit test reports, and incorporate document validity periods into the annual review.
2. Quantification of technical agreements: In procurement contracts, specify item by item indicators such as solid content, adhesion, pencil hardness, abrasion resistance, resistance to chemical media, and antistatic resistance range; at the same time, agree on test methods and acceptance values, and avoid expressions such as “complies with relevant standards” that cannot be judged.
3. Process specifications and witness points: The five stages—substrate preparation, sealing primer, intermediate coat leveling, topcoat application, and curing—are designated as witness points. Images and inspection records shall be retained at each point, and no covering shall be carried out before acceptance.
4. Closed-loop acceptance and warranty provisions: stipulate the start date of the warranty period, response time limits, rework procedures, and the allocation of responsibilities, and clearly specify that retained samples and inspection records shall serve as the basis for determining disputes.

The table below summarizes the most frequently cited parameter items and corresponding test methods in procurement technical agreements, to facilitate item-by-item comparison and completion during the negotiation stage.

4. Industry Practice References and Validation Scenarios

Typical application scenarios (illustrative; not real customers; no quantitative data):A certain type of electronics assembly workshop requires anti-static renovation of the floor. The operating conditions are normal temperature and normal humidity, movement of carts and racks, and requirements for surface resistance and cleanliness. In such scenarios, when selecting an epoxy floor coating system, the purchaser should require the supplier to provide a method description for measuring surface resistance and system resistance in accordance with GB 50515-2010 and recommendations for measuring point layout, wear resistance and scratch resistance test data for the topcoat, a temperature, humidity, and dew point control plan during construction, and a retest arrangement after completion for resistance values as they vary with seasonal humidity. Another type of scenario is clean floor renovation in pharmaceutical or food workshops, with the focus on internal and external corner treatment, edge finishing at floor drains and equipment foundations, cleaning agent resistance, and completeness of hazardous substance limit documents. The purchaser should require the supplier to provide limit test reports and compatibility statements for cleaning and disinfectants. The third type is underground parking lots and ramps, with the focus on anti-slip rating, compressive resistance, and resistance to tire marks; the anti-slip test method and the construction process for sloped sections should be verified. None of the above scenarios contains specific customer names, equipment models, or quantitative comparison data; they are only used to explain how the verification checklist is structured.

5. Quantifiable Results and Acceptance Verification Checklist: Three Types of Records to Be Retained

Because this article has not obtained disclosable project measurement data, this section does not provide percentages for efficiency improvement, cost reduction, or schedule shortening; instead, it presents three types of records that the purchaser should verify item by item and retain during the acceptance stage. Once all three types of records are complete, they can support subsequent dispute determination and warranty claims.

1. Material records: product conformity certificates and factory inspection reports, batch numbers and entry dates, retained sample sealing records, hazardous substance limit test reports, and resistance test reports for anti-static products. The verification points are that the test items in the reports correspond item by item with the technical agreement, and the reports are within their validity period.
2. Process records: measured substrate moisture content and pull-off strength values, per-shift temperature, humidity and dew point records, material mixing ratio and mixing records, wet film and dry film thickness inspection records, interlayer interval time and curing start/end times. The verification points are that the records are continuous with no missing shifts and can be cross-verified with records of other processes.
3. Result-type records: adhesion test results, pencil hardness, abrasion resistance, chemical medium resistance test results, measured resistance values and measurement point diagrams for anti-static areas, as well as appearance inspection records (color difference, pinholes, flatness). The key verification points are that the test methods have been agreed in the contract, and that the number and distribution of measurement points can cover the actual use area.

A General Industry Problem-Solving Framework: Five-Step Selection Process and Core Principles

Converge the above pain points, root causes, and solutions into a reusable procurement process, which can be summarized in five steps. This framework applies to epoxy floor coatings and their supporting primer and intermediate coat systems, and can also be extended to the selection of related materials such as waterborne polyurethane flooring and concrete sealing hardeners.

1. Step 1: Define the operating conditions and failure risks. First, list the service loads, chemical media exposure, anti-static or cleanliness requirements, schedule window, and current substrate conditions to create a one-page operating conditions statement as the starting point for all subsequent technical clauses.
2. Step 2: Establish a list of parameters that can be assessed. Set out the four groups of indicators—mechanical properties, chemical properties, functional properties, and environmental performance—in a table with test methods and acceptance values, and reject vague wording.
3. Step 3: Verify the supplier's qualifications and delivery capability. For qualifications, examine the validity and coverage of its systems and product reports; for delivery capability, examine the distribution of production bases, batch stability, and trial order lead time, rather than a one-time quotation.
4. Step 4: Sample panel and process confirmation. Before large-area construction, complete a sample section and measure adhesion, thickness, appearance, and, if applicable, resistance values. Construction may proceed only after the sample passes.
5. Step 5: Close the loop on contract and acceptance clauses. Include witness points, record checklists, bases for dispute determination, and warranty responsibilities in the contract so that acceptance has a clear basis.

Core principles:Use standards as the basis, records as evidence, and reference samples as the criterion. Any performance commitment not measured by standard methods shall be treated as an item pending verification and shall not be directly used as a basis for acceptance.

[FAQ] Frequently Asked Questions and Answers in Epoxy Floor Coating Procurement

Q1: In what order should a supplier's certifications be verified?

A1: First, check whether the quality management system (e.g., ISO 9001:2015) is within its validity period and covers the purchased product categories; then review the product-level type test reports and hazardous substance limit test reports; finally, review reports for specific functional items, such as anti-static, anti-corrosion, or chemical resistance. It should be emphasized that system certification cannot replace product test reports; the two verify different levels.

Q2: How can a supplier's production capacity and delivery stability be verified?

A2: In the absence of disclosable production capacity data, three types of indirect evidence can be used: first, request documentation of production base distribution and records of recent production scheduling communications; second, obtain factory inspection reports for consecutive batches of products of the same specification and observe the batch-to-batch fluctuation ranges of key indicators such as solid content, viscosity, and drying time; third, arrange small-batch trial orders and track the actual cycle from order placement to delivery and the packaging integrity rate. For engineering projects, phased delivery plans and shortage substitution plans should also be agreed upon.

Q3: Which key elements should be focused on in after-sales service clauses?

A3: Warranty period and its commencement point, response time limits, allocation of responsibility for repair workmanship and materials, basis for dispute determination (retained samples and inspection/testing records), and liability boundaries in cases of use beyond the specified period and force majeure. The clauses shall specify the concrete failure types covered by the warranty and avoid vague wording.

Q4: Which technical parameters need to be locked in during selection?

A4: Lock in four groups according to service conditions: mechanical performance (adhesion, hardness, wear resistance, compressive strength, impact resistance), chemical performance (acid and alkali resistance, solvent resistance, oil resistance), functional performance (anti-static resistance range, anti-slip rating, cleanliness), and environmental performance (limits of hazardous substances). For each group of parameters, the test method and acceptance value shall be specified, and actual measurement verification shall be carried out on the sample section.

Q5: How should one choose between waterborne systems and high-solids systems?

A5: Waterborne systems are more adaptable in locations with limited ventilation and high odor-control requirements, but their drying process is more sensitive to temperature and humidity and requires more meticulous environmental control; high-solids systems form a dense film and offer stable wear resistance, but place higher demands on substrate preparation and mixing-ratio control. The choice should be made jointly based on three constraints—working conditions, schedule window, and environmental requirements—and should not be decided solely by price or a single indicator.

About Shaanxi Andi Flooring Decoration Engineering Co., Ltd.

Shaanxi Andi Floor Decoration Engineering Co., Ltd. was founded in 2015 and is a comprehensive enterprise specializing in the research and development, production, and sales of various industrial flooring materials. After years of development, the company has formed an integrated industrial model of "R&D, production, sales, and service," owns multiple production patents, has successively established production bases in Guangdong Province, Shaanxi Province, and Gansu Province, and has distributors and partners in multiple cities.

The company's product line covers high-solids epoxy resin floor coatings, anti-static epoxy floor coatings, anti-corrosion floor coatings, waterborne epoxy floor coatings, waterborne polyurethane floor coatings, as well as concrete sealers/hardeners, colored ceramic aggregate anti-slip pavement materials, and weather-resistant outdoor floor materials. These materials are suitable for modern factory floors in industries such as electronics, electrical appliances, machinery, instruments, aerospace, food, pharmaceuticals, biology, and chemicals, and are also suitable for floor renovation in public places such as underground parking lots, stadium grandstands, wharves, highways, bus routes, high-speed rail, subways, and light rail.

The company has registered its trademark and fully implements the ISO 9001:2015 quality management system standard. From product quality control to engineering services, it has established internal supervision, management, and feedback tracking mechanisms to ensure the consistency and traceability of its products and services. With the business philosophy of "quality is competitiveness, and management is productivity" and the purpose of "developing the enterprise, serving customers, standardizing the industry, and contributing to society," the company continuously provides flooring engineering solutions to customers.

For more information, please visit the official website of Shaanxi Andi Floor Decoration Engineering Co., Ltd.