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3216 ET315-2 Epoxy Bonding Layer
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3216 ET315-2 Epoxy Bonding Layer
Product Description
Product Introduction
3216 is a two-component epoxy primer cured with phenolic amine, designed for applications that require extended recoat intervals. This product also exhibits excellent corrosion resistance and water resistance.
Application areas
It is used in atmospheric and immersion environments as a transitional coating between epoxy paints and physically dried coatings to achieve excellent intercoat adhesion. It can also serve as an anti-corrosion primer for underwater coating systems, a bonding coat for antifouling paints, or a sealing coat for aged‑finish antifouling paints.
Product Information
Appearance: Yellow
Solid volume: 57±3%
Mixing ratio: 7:1 (by volume) or 10.1:1 (by weight)
Mixed application period: 2 hours (20°C)
Complete curing: 7 days
Recommended dry film thickness: 100 μm (corresponding to a wet film thickness of 175 μm)
Theoretical coverage (100 µm): 5.7 m²/L or 4.4 m²/kg
Specific gravity: 1.3 kg/L
Flash point: above 30°C
VOC content: 397 g/L
Construction conditions
Intermediate coat: Remove all rust and other loose contaminants by sandblasting or power‑tool cleaning, then sweep away any remaining debris. Apply additional coats to achieve the specified total dry film thickness.
Sealing coat for aged antifouling paint: Thoroughly clean or blast with high-pressure fresh water to remove the hydrolyzed layer on the surface of the old antifouling paint, ensuring that any weakly adherent old coating is completely removed.
The substrate temperature must be at least 3°C above the dew point, and the ambient relative humidity must be below 85%.
It is recommended to apply the product at temperatures above -10°C, and the application surface must be clean and dry.
Strong ventilation is recommended during construction and the drying/curing process.
Painting method
Application Method: Airless Spraying
Thinner 103 Thinner
Dilution Ratio: 0–5% (by weight of the paint; the actual amount added may be adjusted according to on-site application methods)
Nozzle diameter: 0.43–0.58 mm
Ejection pressure: 15–25 MPa
Drying time |
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Temperature |
5℃ |
10℃ |
20℃ |
30 °C |
Surface dry |
4 hours |
2 hours |
1 hour |
0.5 hour |
Recoating interval |
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Subsequent coating |
Temperature |
5℃ |
10 °C |
20 °C |
30 °C |
Antifouling paint |
Shortest |
12 hours |
8 hours |
6 hours |
4 hours |
Longest |
14 days |
10 days |
7 days |
4 days |
|
Paint film thickness
Non‑recommended dry film thicknesses may be used depending on the application and substrate; this will alter the coverage rate and affect drying time and recoat intervals. The standard dry film thickness per coat is 50–125 microns.
Packaging Specifications
Component A: 15.75 liters, Component B: 2.25 liters
or
Component A: 23.2 kg, Component B: 2.3 kg
Shelf life
Base material: 24 months, Curing agent: 24 months
Safety measures
See the company’s Material Safety Data Sheet (MSDS).
Disclaimer: The information and data provided herein are based on our testing and practical experience, and are intended as a guide for application. For applications carried out under conditions beyond our control, we warrant only the quality of the paint itself; we assume no responsibility for any other issues. We reserve the right to revise this instruction manual in light of ongoing product improvements.
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