2K EpoxyPrimer
2K two-component epoxy primer
Two-component epoxy polyamide primer, specially developed for automotive refinishing and OEM coating. Excellent corrosion resistance and adhesion, firmly bonding with various substrates such as steel, aluminum, and galvanized sheets. With salt spray resistance of 500h+, it serves as the first protective barrier in the automotive coating system.
ProductsOverview
2K epoxy primer is a heavy-duty anti-corrosion coating designed by Kexin New Materials in accordance with the ISO 12944 standard. It is scientifically formulated with high-quality resins and high-performance anti-rust pigments, offering excellent corrosion resistance and adhesion. It is widely used for protective coating in heavy-duty anti-corrosion fields such as steel structures, bridges, petrochemicals, and ships.
The product has passed rigorous salt spray testing (>1000h) and adhesion testing (>5MPa), and with a complete base-intermediate-topcoat system, it can provide long-lasting protection for 15-25 years. Kexin provides free coating design solutions and technical support services.
Why choose the 2K epoxy primer?
CoreAdvantages
Redefining quality standards for automotive refinishing
Outstanding corrosion resistance
The epoxy polyamide curing system forms a dense coating that effectively blocks the penetration of water, oxygen, and corrosive ions. It withstands over 500 hours of salt spray testing without blistering or corrosion, providing reliable long-term anti-corrosion protection for metal substrates.
Works on many substrates
It exhibits excellent adhesion to a variety of commonly used automotive substrates, including cold-rolled steel, galvanized steel, aluminum alloy, and stainless steel. There is no need to frequently switch primer products for different substrates, simplifying procurement and inventory management.
Fast drying, high efficiency
Baking at 60°C for 30 minutes allows for immediate sanding, while at room temperature (25°C), sanding can be done within 2-4 hours. The pot life extends up to 4 hours, eliminating the need for frequent mixing during large panel spraying, significantly improving construction efficiency.
Excellent filling and sealing
High-solid formulation (55%+), with excellent filling and covering ability for sanding marks and minor defects. Effectively seals the pores of the putty layer, preventing the topcoat from being absorbed and causing loss of gloss.
Strong compatibility
Outstanding intercoat adhesion to body filler, primer surfacer, basecoat and clearcoat. Fits PPG, BASF and Axalta mainstream systems.
Low-VOC eco-friendly formula
VOC content<420g/L，Compliant with GB 24409-2020Standard。铬酸盐contentComplies最新Environmental compliance法规Requirements，MeetsAutomotive主机厂对Environmental compliance材料的UseSpecification。
TechnicalParameters
Basic parameters
Performance data
Frequently AskedFAQ
ApplicationProcess
Surface preparation
Abrade the substrate to Sa2.5 / St2 and remove oil and dust. Sand body filler smooth with P240-P320 paper.
Mixing
Main agent: curing agent = 4:1, mix evenly. Add 10-20% thinner to adjust viscosity based on the application method. Filter through a 200-mesh screen before use.
Spray application
HVLP spray gun / 2.0-2.5 bar / 15-20 cm. Apply 2-3 coats, with 5-10 minutes of flash-off between each coat. Total film thickness: 60-80 μm.
Dry & sand
Dries hard at 60°C for 30 minutes or at 25°C for 2-4 hours. Wet sand with P400-P600 sandpaper until the surface is smooth, then clean and remove dust.
Midcoat / Topcoat
After sanding and cleaning the primer, apply primer surfacer or basecoat directly. Ensure the primer surface is dry, clean and uncontaminated.
Applicationsscenario
Primer application scenarios covering the full workflow
Whole-vehicle priming
The complete vehicle body is fully sprayed with epoxy primer inside a downdraft spray booth, for even coverage with no blind spots
Door cavity protection
A dedicated lance spray gun feeds epoxy primer deep into door cavities, stopping hidden areas from rusting from within
Chassis armor protection
A high-build epoxy anti-corrosion primer on the chassis and wheel arches resists stone impact and road-salt attack
Engine bay protection
Engine-bay sheet metal needs epoxy primer protection in high-heat service, withstanding continuous 120°C
Inner wheel-arch rust protection
The inner wheel arch takes the most abuse from chippings and muddy spray – epoxy primer is the first line of defence
Frame rail protection
Epoxy primer on truck and commercial-vehicle frame rails delivers C4-C5 high-durability protection
New-panel priming
Replacement sheet-metal panels are epoxy-primed before fitting, giving bare metal factory-grade protection
Aluminium body primer
Aluminium body panels need a dedicated epoxy primer for adhesion, preventing oxidation and galvanic corrosion
Galvanized steel primer
Galvanised steel, widely used on modern cars, needs a matched primer so the coating system stays bonded long-term without peeling
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EP-800 epoxy primer is now open for sample requests. Free technical consultation and construction guidance are available.
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More coatings industry trends and policy updates
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