Dachin AC 721
Acrylic coating

Main Composition

A single-component anti-corrosion topcoat composed of acrylic resin, additives, pigments, and organic solvents.

Main Characteristics

The cured film exhibits excellent adhesion, hardness, gloss, and weather resistance, effectively preventing moisture and UV damage to the coating.

Main Applications

Designed for corrosion protection and decoration of steel structures in C4 environments, suitable for maintenance and repair coating of exterior steel surfaces.

Technical Specifications

Film Color and Appearance	Uniform surface with no particles, pinholes, bubbles, or wrinkles
Density, kg/L	1.28±0.04
Fineness, μm	≤35
Impact Resistance, kg·cm	≥50

Package Specifications

Package Weight / kg	Package Volume / L
20	15.6

Basic Parameters

Mix Ratio	Single-component
Pot Life	Unused portions can be resealed and reused for subsequent applications.
Theoretical Consumption	Approx. 7.8㎡/L @ 60μm dry film thickness

Recoat Interval

Temperature	Surface Dry	Minimum Recoat Interval	Maximum Recoat Interval
10℃	60 minutes	24 hours	Unlimited
25℃	30 minutes	16 hours
30℃	20 minutes	12 hours

Data based on standard film thickness applied to steel substrate.

Application

• Dachin AC 721 Acrylic Coating is recommended for airless spray application to achieve optimal single-coat film formation. It can also be applied via air spray, brush, or roller.
• Surface temperature must remain at least 3℃ above dew point. Optimal application temperature range: 5℃-35℃, with humidity <85%.
• Ensure ventilation in enclosed spaces during application.
• Thoroughly mix the coating before use. Maintain tool cleanliness before and after application.
• Avoid contact with water, acids, or alkalis during mixing and application.
• Allow full curing for 7 days before putting the coated surface into service.

Compatible Coatings

Previous Coat: Dachin EP 550 Epoxy Iron Oxide Intermediate Coat, Dachin ZP 210 Epoxy Zinc Phosphate Primer, etc.

Recommended Coats

Apply 1-2 coats for a dry film thickness of 60±5μm.

Surface Preparation

Clean the substrate to remove oil, dust, and other contaminants. Ensure no acid/alkali residues or moisture condensation on the surface. For cured polyurethane, fluorocarbon, or epoxy coatings, lightly sand and roughen the surface before applying topcoats.

Mixing

This single-component product requires only the addition of配套 diluent. Thoroughly mix with power tools before application.

Application Methods

Application Method	Diluent	Dilution Rate	Nozzle Orifice	Pressure
Airless Spraying	Dachin Thinner X10	0-10% (by paint weight)	0.4-0.5mm	10-15 MPa
Air Spraying	Dachin Thinner X10	0-10% (by paint weight)	1.5-2.0mm	0.3-0.5 MPa
Roller/Brush	Dachin Thinner X10	0-10% (by paint weight)	-	-

Dilution rates are calculated by paint weight.