Place of Origin:
Guangdong Province，China
Brand Name:
Zuotong
Certification:
MSDS, TDS
Model Number:
Z9708
Zuotong Z9708 Epoxy Primer is a two-component epoxy resin anti-corrosion primer for properly prepared metal substrates in automotive refinishing and general industrial coating work.
Used with Z9288HT Epoxy Primer Hardener, Z9708 forms a cross-linked protective film that helps improve adhesion between the substrate and subsequent coatings. Its protective mechanism combines a dense epoxy barrier layer with anti-corrosive pigments to help reduce the penetration of moisture, oxygen, salt, and common corrosive contaminants.
It is suitable for steel structures, fabricated metal parts, industrial equipment, commercial vehicles, automotive collision repair, exposed repair metal, and maintenance repainting projects. After full curing and sanding, the primer can be recoated with compatible primer surfacers, polyurethane topcoats, or fluorocarbon topcoats.
Z9708 is positioned for projects requiring stable, practical corrosion protection rather than an unnecessarily complex premium system. It is suitable for conventional steel-structure priming, industrial maintenance, and automotive repair workflows.
For buyers managing steel structures, municipal works, equipment maintenance, or vehicle refinishing programs, Z9708 provides a practical balance between material cost, application efficiency, adhesion, and anti-corrosion performance.
When surface preparation and application procedures are controlled, Z9708 provides a stable primer layer for compatible intermediate and finish coatings.
Primer and hardener react after mixing to form a chemically cured epoxy film with stable adhesion and coating strength.
The cured film helps isolate the metal substrate from moisture and corrosive media, while anti-corrosive pigments contribute to the overall protection system.
Suitable for properly prepared carbon steel, bare steel, galvanized steel, aluminum, stainless steel, and repaired vehicle panels.
Suitable for normal industrial environments, metal equipment, steel structures, and maintenance work where humidity resistance is required.
The fully cured coating system is intended to provide good resistance to common oil contamination, salt water, and mild acid or alkali exposure. Final resistance depends on film thickness, cure, and the complete coating system.
A reliable primer choice for exposed metal following collision repair, welding, panel replacement, sanding, and bodywork restoration.
Can be sanded after approximately 5 hours at 25°C or 30 minutes at 60°C, supporting efficient workshop turnover.
Offers an approximate 2-hour pot life at 25°C, allowing normal project mixing and spraying without excessive material waste.
After full cure and P600 sanding, it may be recoated with compatible epoxy intermediate coats, polyurethane topcoats, or fluorocarbon topcoats.
Built for buyers who need a mature epoxy anti-corrosion solution with balanced performance and cost control for regular engineering use.
| Substrate | Preparation | Typical Use |
|---|---|---|
| Bare steel / carbon steel | Sand P320–P400; degrease and remove dust | Steel fabrication, repair panels, equipment |
| Galvanized steel | Abrade and clean thoroughly | Vehicle panels, metal components |
| Aluminum | Sand, degrease, remove oxidation residue | Automotive and fabricated aluminum parts |
| Stainless steel | Abrade and remove oil, dust, contaminants | Equipment and decorative metal components |
| Automotive repair metal | Remove welding residue, rust, oil and sanding dust | Collision repair and panel replacement |
| Industrial machinery | Remove loose coating, rust, oil and dust | Equipment refurbishment and maintenance |
| Steel structure components | Prepare according to project coating standard | Municipal, warehouse, and engineering works |
Surface preparation is essential. Adhesion and corrosion protection depend on substrate cleanliness, sanding profile, coating thickness, curing conditions, and use of a compatible full coating system.
| Item | Recommended Parameter |
|---|---|
| Product | Zuotong Z9708 Epoxy Primer |
| Matched Hardener | Z9288HT Epoxy Primer Hardener |
| Reducer Options | ZK103 General Reducer / ZK301 High-Performance Reducer |
| Mixing Ratio | Primer : Hardener : Reducer = 4 : 1 : 1.5–2.5 by volume |
| Pot Life | Approx. 2 hours at 25°C |
| Spray Equipment | Gravity-feed spray gun |
| Nozzle Size | 1.5–1.7 mm |
| Spray Pressure | 2–3 kg/cm² |
| Spray Coats | 2 thin coats |
| Spray Distance | 15–20 cm |
| Flash-Off Between Coats | Approx. 5 minutes at 25°C |
| Sanding Before Next Coat | P600 sandpaper after full drying |
| Drying Condition | Dust-Free | Sandable |
|---|---|---|
| 25°C air dry | Approx. 15 minutes | Approx. 5 hours |
| 60°C force dry | Approx. 5 minutes | Approx. 30 minutes |
Actual drying time may vary according to film thickness, panel temperature, spray booth ventilation, humidity, reducer choice, and coating application conditions.
Dry sand the metal substrate with P320–P400 abrasive paper. Remove all oil, wax, sanding dust, loose corrosion products, and contaminants before spraying.
Mix:
Mix by volume and stir thoroughly until uniform.
Use the activated material within approximately 2 hours at 25°C. Higher temperatures can shorten pot life.
Use a gravity-feed spray gun with a 1.5–1.7 mm fluid tip and an operating pressure of 2–3 kg/cm².
Spray two thin, even coats from a distance of 15–20 cm. Allow approximately 5 minutes flash-off at 25°C between coats.
Choose either air drying at 25°C or force drying at 60°C according to the required production schedule.
After complete drying, sand with P600 abrasive paper. Remove sanding dust thoroughly before applying a compatible primer surfacer, topcoat, or finish system.
| Comparison Point | Zuotong Z9708 Epoxy Primer System | Typical Low-Cost Universal Epoxy Primer | Buyer Value |
|---|---|---|---|
| Product Positioning | Routine industrial corrosion protection and steel-structure priming | Basic low-cost rust prevention | Better balance for professional engineering and repair projects |
| Main Protection Approach | Epoxy barrier film plus anti-corrosive pigments | Mainly barrier protection | More complete anti-corrosion concept |
| Adhesion | Stable when surface preparation follows specification | May fluctuate with substrate and preparation | Lower risk of coating failure with controlled preparation |
| Film Density | Balanced protective film structure | Often limited by lower resin content | More stable protection potential |
| Water and Humidity Resistance | Suitable for normal industrial anti-corrosion use | Generally basic | Better fit for humid maintenance environments |
| Salt Exposure Resistance | Intended for routine industrial corrosion control | Often lower-positioned | Suitable for steel and equipment protection systems |
| Oil / Mild Acid / Mild Alkali Resistance | Good when fully cured within a compatible system | Usually basic | Supports a broader industrial use range |
| Application Tolerance | Balanced pot life, flow, and sanding cycle | May show short pot life, runs, or inconsistent drying | Easier workshop management |
| Coating Compatibility | Can be recoated with compatible epoxy, polyurethane, and fluorocarbon systems | Compatibility and stability may be limited | Supports more coating-system options |
Note: Comparative results depend on formulation, substrate preparation, specified dry-film thickness, curing conditions, and test standards. Avoid treating this table as a substitute for project-specific qualification testing.
For structural steel, fabricated assemblies, brackets, frames, handrails, enclosures, and metal components requiring primer-stage corrosion protection.
For machinery housings, storage equipment, metal cabinets, equipment covers, and refurbishment projects.
For bare metal exposed during collision repair, welding, grinding, panel replacement, and rust-removal work before primer surfacer application.
Suitable for trucks, trailers, agricultural equipment, construction equipment, and other metal vehicle components with compatible finishing systems.
Suitable for conventional corrosion-control projects involving metal railings, utility structures, steel fixtures, and maintenance painting.
For production or repair work involving metal parts requiring a chemically cured epoxy primer before final coating.
| Item | Details |
|---|---|
| Product Name | Zuotong Z9708 Epoxy Primer |
| Brand | Zuotong |
| Model | Z9708 |
| Product Type | Two-component epoxy resin anti-corrosion primer |
| Matched Hardener | Z9288HT Epoxy Primer Hardener |
| Recommended Reducers | ZK103 General Reducer / ZK301 High-Performance Reducer |
| Mixing Ratio | 4 : 1 : 1.5–2.5 by volume |
| Pot Life | Approx. 2 hours at 25°C |
| Application Method | Spray application |
| Recommended Coats | 2 thin coats |
| Substrate Preparation | P320–P400 dry sanding; degrease and remove dust |
| Sanding Before Recoat | P600 after complete drying |
| Packaging | 3.75L * 4 cans per carton |
| Carton Size | 34.8 * 34.7 * 21 cm |
| Shelf Life | 24 months unopened under recommended storage conditions |
| Reference HS Code | 3208201090 |
Use Zuotong Z9288HT Epoxy Primer Hardener.
Mix Z9708 Primer : Z9288HT Hardener : Reducer = 4 : 1 : 1.5–2.5 by volume.
Use ZK103 General Reducer or ZK301 High-Performance Reducer, according to the coating process and project requirements.
It is suitable for properly prepared galvanized steel and aluminum. The substrate must be abraded, degreased, dry, and free from oxidation or contaminants.
At 25°C, the primer is sandable after approximately 5 hours. With 60°C force drying, it is sandable after approximately 30 minutes.
The recommended procedure is to allow full drying, sand with P600, remove dust, and then apply a compatible primer surfacer or approved finishing system.
Common causes include insufficient sanding, oil or silicone contamination, moisture, loose rust, poor dust removal, incorrect mixing ratio, excessive film thickness, or recoating before proper cure.
Z9708 is intended for routine industrial corrosion protection. For continuous immersion, severe marine exposure, or aggressive chemical-service environments, select and test a project-specific coating system according to the applicable standard.
For qualified export orders, documentation may include:
Project purchasers should confirm destination-market technical requirements, corrosion standard, VOC limits, and import regulations before placing bulk orders.
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