Dachin EP 550
Epoxy cloud iron intermediate coating

Main Composition

A two-component, low-VOC, high-solids, thick-bodied epoxy resin coating composed of modified epoxy resin, mica iron oxide, pigments, fillers, additives, and a phenolic amine curing agent as the hardener component.

Main Characteristics

Combines the functions of a sealing primer and intermediate coating. Features strong penetration, excellent shielding protection, high adhesion, and compatibility with a wide range of primer and topcoat systems.

Main Applications

Widely used on structural steel in wind power, bridges, offshore engineering, petrochemical plants, paper mills, etc. Complies with standards: "JT/T 722-2023 Bridge Steel Structure Anti-corrosion Coating Technical Specifications" and "JT/T 733-2021 Surface Coating Technical Specifications for Port Machinery Steel Structures".

Technical Specifications

Film Color and Appearance	Grey, smooth film surface
Volume solids content, %	66.4±1
Density, kg/L	1.62±0.05

Package Specifications

	Package Weight / kg	Package Volume / L
A	25.2	15.8
B	6.8	4.2
Total	32	20

Basic Parameters

Mix Ratio	Weight ratio A:B = 3.7:1 Volume ratio A:B = 3.75:1
Pot Life	5℃: 3h; 15℃: 2.5h; 25℃: 2h
Theoretical Consumption	Approx. 6.6㎡/L @ 100μm

Recoat Interval

Temperature	Surface Dry	Hard Dry	Recommended Topcoat Recoat Interval
			Minimum	Maximum
5℃	6 hours	24 hours	24 hours	3 months
15℃	5 hours	18 hours	18 hours
25℃	3.5 hours	12 hours	12 hours
40℃	2 hours	6 hours	6 hours

Data based on standard film thickness applied to steel substrate.

Application

Dachin EP 550 Epoxy Mica Intermediate Coating is recommended for application via airless spray. Effective single-coat application can also be performed using conventional spray, brushing, or roller methods.

Surface temperature must remain at least 3℃ above dew point with humidity <85%. Curing requires temperatures above 5℃, with maximum application temperature at 40℃. Substrate must be clean and dry. Ensure ventilation in enclosed spaces.

Mix base (A) and hardener (B) in required ratio before use. Use only prepared quantities, stir thoroughly, and consume within 4 hours after mixing. Maintain tool cleanliness and dryness throughout application.

Compatible Coatings

Undercoat: Dachin Zinc 081 Epoxy Zinc-rich Paint, Dachin Zinc 086 Epoxy Zinc-rich Paint, Dachin Zinc 087 Epoxy Zinc-rich Paint, Dachin Zinc 088 Epoxy Zinc-rich Paint, Dachin Graphene 013 Epoxy Graphene Zinc Paint, Dachin Graphene 016 Epoxy Graphene Zinc-rich Paint, Dachin Graphene 018 Epoxy Graphene Zinc-rich Paint.

Topcoat: Dachin PU 770 Polyurethane Paint, Dachin PS 990 Siloxane Paint, Dachin FC 880 Fluorocarbon Paint.

Surface Preparation

Underlying coatings must be clean and free of oils/dust. Apply Dachin EP 550 over properly cured primers. Recoat within specified intervals. Repair damaged areas to required standards before application.

Mixing

Supplied in two-component packaging (Base A and Hardener B). Thoroughly mix each component with power tools before use. Mix strictly by ratio and homogenize.

Application Methods

Application Method	Diluent	Dilution Rate	Nozzle Orifice	Pressure
Airless Spraying	Dachin Thinner X17	0-5%	0.53-0.635mm	≥190 kg/㎡ at nozzle
Air Spraying	Dachin Thinner X17	0-10%	1.8-2.5mm	0.3-0.5 MPa
Roller/Brush	Dachin Thinner X17	5-10%	-	-

Dilution rates are calculated by paint volume.