China Clear Epoxy Floor Coating (Buying Tips)
When buying clear epoxy floor coating from a Chinese supplier, compare complete system data, not just price or gloss. Get the current technical data sheet (TDS), safety data sheet (SDS), batch certificate, mix ratio, cure schedule, and test reports for adhesion and UV resistance. Confirm the system fits your slab, exposure, and installer, then verify a sample before ordering.
A low quoted price can hide costs: freight, import duties, surface preparation, or a separate UV-resistant topcoat. A clear finish can also show substrate flaws and may yellow with UV exposure. I assess these coatings by checking whether a supplier can document performance for the exact product and conditions, rather than relying on broad claims such as “industrial grade” or “non-yellowing.”
No single standard governs all resinous epoxy floors. Specify the work using the coating manufacturer’s current instructions, and ask a qualified installer to confirm the slab’s condition and preparation needs. The checklist below helps you compare suppliers and avoid paying for a coating that is not suited to your project.
Surface Preparation and Cleaner Chemistry
Surface preparation determines whether a coating can bond to concrete; cleaner chemistry matters once the coating has cured. Before buying, ask the supplier to state the substrate requirements and the approved maintenance products. The TDS should guide preparation, application, cure, and cleaning for that specific system.
Ask how the manufacturer expects the concrete to be prepared. ICRI 310.2R is a reference for selecting concrete surface-preparation methods. The required profile depends on the coating system; do not assume every epoxy needs the same grind or texture. Ask for written instructions covering contaminants, moisture assessment, cracks, and any primer.
For an adhesion test on a concrete coating, ASTM D7234 describes a pull-off method. Ask whether a reported result used this method, what substrate and preparation were tested, and whether the report applies to the product you are buying. A number without test conditions is difficult to compare.
Also ask which cleaners are approved after full cure. A neutral, nonabrasive detergent with a target pH of 7–9 is a reasonable starting point only if the coating maker confirms compatibility. Strong acids, strong alkalis, and abrasive pads can damage some finishes. Do not assume a cleaner is safe just because it is sold for floors.
Mop, Microfiber, and Water Setup
Your maintenance plan is part of the purchase decision, especially for floors near children, pets, or frequent foot traffic. Ask what routine cleaning the cured system allows and whether the maker lists approved cleaners. A compatible cleaner and simple equipment help prevent residue, scratching, and avoidable exposure to cleaning chemicals.
For routine cleaning, use a soft-bristle broom or clean microfiber dust mop to lift grit before wet mopping. Grit can scratch a clear surface under shoes or a mop. For damp mopping, a flat split-microfiber head around 250–350 g/m² is a practical specification to discuss with the supplier.
Use cool-to-lukewarm water at or below 40°C. Follow the cleaner label for dilution; if it gives no ratio, do not guess. Choose a coating-approved ready-to-use cleaner instead. Keep the mop damp, not saturated, and avoid flooding the floor or leaving water pooled near joints, cracks, or coating defects.
| Item to confirm | Useful buying question |
|---|---|
| Cleaner | Which neutral, nonabrasive products are approved for this cured coating? |
| Water | Is cool-to-lukewarm water, no warmer than 40°C, acceptable? |
| Mop | Is a damp flat split-microfiber mop suitable? |
| Rinse | Does the coating maker require or recommend a clean-water pass? |
Damp-Mopping and Drying Technique
A careful cleaning routine protects the finish after it reaches full cure. Confirm the product’s full-cure time in the TDS before planning wet cleaning; “dry to touch” or “ready for light foot traffic” may not mean fully cured. The maker’s stated conditions matter, since temperature and other application conditions can affect cure.
- Wait until the manufacturer-stated full cure before wet cleaning. Remove grit with a soft-bristle broom or clean microfiber dust mop.
- Mix the approved neutral cleaner at its label dilution. Damp-mop in overlapping passes and clean or change the mop head when it looks dirty.
- Make a light clean-water rinse pass if the cleaner leaves residue or the coating maker requires one. Do not leave standing water.
- Ventilate or use air movement until dry. Aim to dry the floor within 10 minutes as an operational target, not as a cure specification. Keep people and pets off until it is dry.
Cleaning too early, or letting water collect at cracks and defects, can contribute to whitening, adhesion loss, or moisture-related failure. If the coating remains tacky or develops persistent haze, stop wet cleaning and contact the supplier or installer. Do not treat ongoing tackiness as a normal cleaning issue.
Mop-Head Sanitizing and Maintenance
Reusable microfiber can collect grit and cleaning residue, so its condition affects cleaning quality. Choose heads that can be washed according to their care label, and ask the coating supplier whether any disinfectant is approved for the cured finish. Avoid carrying dirty solution across the floor or using a contaminated mop on a clear coat.
Rinse or replace a visibly soiled mop head during cleaning. Wash microfiber without fabric softener, which can leave a film on the fibers and reduce their ability to pick up soil. Follow the mop maker’s laundering instructions; do not assume bleach or a particular wash temperature is suitable.
If sanitation is required, select a product specifically approved by the coating manufacturer and follow its label. “Disinfecting” does not automatically mean compatible with epoxy. Keep the floor dry after cleaning, and investigate any recurring haze or tackiness before changing to stronger chemicals.
Compare Products and Supplier Evidence
A useful quote identifies the exact resin and hardener, not just a generic “clear epoxy.” It also states the intended use, coverage basis, packaging, and shipping terms. Compare like with like: a coating intended as a thick casting resin is not automatically a suitable floor coating.
| Evidence | What to request | Why it matters |
|---|---|---|
| Current TDS and SDS | Exact product name, revision date, application and safety details | Confirms instructions and hazards for the quoted system |
| Batch COA | Certificate of analysis for the production batch | Links supplied material to reported batch checks |
| Mix and cure | Component ratio, pot life, recoat window, full-cure time, conditions | Helps plan accurate mixing and installation |
| Coverage | Rate per coat, stated thickness, and surface assumptions | Lets you compare material cost fairly |
| Adhesion | Test method, substrate, preparation, and report | Makes performance claims more meaningful |
| UV resistance | Test method, exposure, duration, and visual or color results | Helps assess risk of yellowing |
| Compatibility | Primer, topcoat, and cleaner approvals | Reduces incompatibility between system layers and maintenance products |
Pot life is the time a mixed batch remains usable under stated conditions. Recoat window is the period in which another layer can bond without extra preparation, as specified by the maker. Request these values for the exact product and ambient conditions; do not compare figures taken from different temperatures or formulas.
Ask whether coverage is per coat and whether the quoted rate assumes smooth, sealed concrete. Porous or rough concrete may use more material. A coverage figure without film thickness, substrate condition, and number of coats can make two offers look comparable when they are not.
For clear epoxy, request documented UV or yellowing performance. Clear epoxy may yellow with UV exposure, so do not accept “UV stable” without a report that identifies the tested product and conditions. Where sunlight exposure matters, ask whether a compatible UV-resistant polyurethane or polyaspartic topcoat is available, and get written confirmation that it bonds to the epoxy system.
China Sourcing, Samples, and Landed Cost
A supplier’s location does not prove or disprove product quality. The practical task is to verify traceable documents, clear communication, and a shipment that matches the approved sample and quoted specification. Ask who makes the resin, who issues the documents, and how the supplier identifies production batches and component packs.
Request a small sample kit or sample panel before committing to a large order. Check that the delivered labels, mix ratio, color, and packaging match the documentation. A sample can reveal handling or appearance issues, but it cannot replace a full installation trial on your concrete or prove long-term UV performance.
Compare the landed cost, not the factory price alone. Include freight, insurance, import charges, local delivery, waste allowance, surface preparation, primer, and any protective topcoat. Confirm shelf life and storage conditions, plus the process for reporting damaged or mismatched goods. Keep the quote, label photos, TDS, SDS, COA, and test reports together.
Installation Scenarios and Buying Decisions
These scenarios are decision examples, not claims about completed projects. They show how exposure and substrate can change what to request. Before ordering, match the stated system requirements to the actual slab and use, and have a qualified installer assess conditions that the product documents do not resolve.
- Sunlit entry or showroom: Ask for UV test evidence and a compatible UV-resistant topcoat option. Compare the full system cost, not clear epoxy alone.
- Interior workshop with sound concrete: Prioritize preparation instructions, abrasion data, adhesion evidence, and a cure schedule that fits the shutdown period.
- Concrete with cracks or unknown moisture: Pause the order until an installer assesses the slab and the supplier confirms the repair and moisture requirements in writing.
- Small test area: Use the exact primer, mixing ratio, application rate, and cure conditions planned for the full job. A test on a different substrate may not predict the result.
If a supplier cannot answer basic questions about the concrete, cure, or system layers, ask for clarification before payment. If answers remain vague, choose a better-documented product rather than relying on a low price or polished sales language.
Final Buying Checklist
A sound purchase balances fit, evidence, handling, and maintenance. Before paying, confirm the product is a floor coating intended for your substrate and exposure, not simply a clear resin. Make sure the supplier’s written documents, quote, sample, and shipment refer to the same system and revision.
- Get the current TDS, SDS, and batch COA.
- Confirm mix ratio, pot life, coverage, recoat window, and full-cure time.
- Request adhesion and UV/yellowing reports with methods and test conditions.
- Confirm concrete preparation, primer, and topcoat compatibility.
- Verify approved cleaner, water limits, mop method, and cure-before-cleaning rules.
- Check sample, shelf life, storage, packaging, shipping, and total landed cost.
The best choice is the one with credible, product-specific evidence and a maintenance plan you can follow. If a key document or compatibility answer is missing, treat that as a buying risk, not a minor paperwork gap.
Frequently Asked Questions
These short answers cover the checks buyers most often need before choosing a clear epoxy floor system. Confirm details in the current TDS and with the manufacturer, since formulas and instructions vary. A supplier’s general statement is not a substitute for data tied to the exact product and conditions.
Is clear epoxy always UV-resistant?
No. Clear epoxy may yellow with UV exposure. Ask for product-specific test data and consider a compatible UV-resistant polyurethane or polyaspartic topcoat.
What documents should I request from a Chinese supplier?
Request the current TDS, SDS, batch COA, mix ratio, cure schedule, coverage, and adhesion and UV test reports.
Does an ASTM D7234 result prove the coating will bond to my floor?
No. It reports a pull-off test under stated conditions. Check the substrate, preparation, and test details, then confirm they apply to your project.
What pH cleaner should I use?
Ask the coating manufacturer to approve the cleaner. A neutral, nonabrasive detergent around pH 7–9 is a target, not a guarantee of compatibility.
Can I use vinegar or alcohol on cured epoxy?
Do not assume either is approved. Check the coating maker’s written cleaner guidance before use.
How soon can I wet-mop a new floor?
Only after the product reaches its manufacturer-stated full cure. Dry-to-touch time is not necessarily full cure.
How warm can mop water be?
Use cool-to-lukewarm water at or below 40°C, unless the coating manufacturer gives a stricter limit.
Should I rinse after using floor cleaner?
Rinse lightly if the cleaner leaves residue or the coating instructions call for it. Do not leave standing water.
What if the cured floor stays tacky or looks hazy?
Stop wet cleaning and ask the supplier or installer to investigate. Persistent tackiness or haze should not be masked with stronger cleaner.
Is a sample enough to approve a large order?
No. A sample helps check appearance and handling, but it does not prove long-term adhesion, UV resistance, or performance on your slab.
(This article was written by one of our staff writers, Steven Caldwell. Visit our Meet the Team page.)
