MT-326 Multi-functional Epoxy Primer
MT-326 Multi-functional Epoxy Primer is a high-solid modified epoxy coating. It provides excellent protection for coated areas and can be applied on minimally prepared or damp substrates. It features excellent compatibility with polyurethane and polyurea topcoats.
Description
Product Description
MT-326 Multi-functional Epoxy Primer is a high-solid modified epoxy coating. It provides excellent protection for coated areas and can be applied on minimally prepared or damp substrates. It features excellent compatibility with polyurethane and polyurea topcoats.
Features
- Environmentally friendly and green formulation.
- Outstanding anti-corrosion performance.
- Excellent adhesion to substrates and superior intercoat adhesion.
- Applicable by airless spraying, air spraying, brushing and rolling, featuring high coating efficiency.
Applications
Widely used in buildings, industrial facilities, ships and offshore platforms. Suitable for metal anti-corrosion, sealing and consolidation of concrete surfaces. It matches perfectly with polyurethane and polyurea coatings.
Main Performance Parameters
| Item | Index | Test Standard |
|---|---|---|
| Storage stability (ambient temperature, 1 year) | No skinning, no hard lumps or gelatinous precipitate; easy to stir uniformly | GB/T 6753.3 |
| Drying time /h (25 ℃ | 5 | GB/T 1728 |
| Impact strength /cm | 50 | GB/T 1732 |
| Flexibility /mm , ≤ | 1 | GB/T 1731 |
| Adhesion /MPa (steel substrate), ≥ | 8 | GB/T 5210 |
| Acid resistance (5% H₂SO₄), 30 d | No blistering, peeling or rusting on coating | GB/T 9274 |
| Alkali resistance (5% NaOH), 30 d | No blistering, peeling or rusting on coating | GB/T 9274 |
| Oil-water mixture resistance, 30 d | No blistering, peeling or rusting on coating | GB/T 9274 |
| Salt water resistance, 30 d | No blistering, peeling or rusting on coating | GB/T 9274 |
Construction Instructions
Mixing Ratio
This product is two-component packaging. A : B = 3 : 1 (by weight) Mix strictly according to the ratio and stir thoroughly before use.
Stir Component A fully until no sediment remains at the bottom of the drum. Weigh Component B accurately per the specified ratio, pour into the mixing container, mechanically stir for 1~2 minutes, transfer to a clean drum and stir for another 1~2 minutes until homogeneous before application.
Pot Life (100g sample)
| No. | Temperature | Pot Life |
|---|---|---|
| 1 | 15 ℃ | 45 minutes |
| 2 | 25 ℃ | 25 minutes |
| 3 | 35 ℃ | 15 minutes |
Notes:
- The above data are laboratory typical values; prepare materials in small batches for on-site use.
- When ambient temperature is above 25 ℃, add 10% epoxy thinner to extend pot life.
Recommended Film Thickness & Coverage
- Recommended wet film thickness: 100 μm
- Theoretical spreading rate: 7 m²/kg
- Specific gravity: approx. 1.33 g/cm³
Application Methods
Air spraying, airless spraying, brushing and rolling are acceptable.
| Coating Method | Item | Parameter |
|---|---|---|
| Air Spraying | Spray gun | DeVibiss MBC-510 |
| Fluid nozzle | D | |
| Air cap | 64HD | |
| Atomizing pressure | 35–40 psi (0.24–0.28 MPa) | |
| Fluid pressure | 15 psi (0.1 MPa) | |
| Fluid & air hose diameter | 3/8” | |
| Airless Spraying | Operating pressure | 3625–4350 psi (25–30 MPa) |
| Nozzle size | 0.019”–0.023” (0.48–0.58 mm) | |
| Thinning | Not required | |
| Brushing / Rolling | Tools | Hard bristle brush, small iron bucket, etc. |
Tool Cleaning
Clean with dedicated epoxy thinner.
Keep the construction site well ventilated and prevent dust and impurities from contaminating uncured coating during and after application.
Drying Time
(Wet film thickness: 100 μm; Relative humidity: 50%±5%)
| Item | 0 ℃ | 15 ℃ | 25 ℃ |
|---|---|---|---|
| Touch dry /h | 14 | 8 | 4 |
| Transportable /h | 30 | 18 | 10 |
| Recoating interval | |||
| Minimum /h | 18 | 16 | 8 |
| Maximum /d | 10 | 7 | 7 |
| Full curing /d | 10 | 7 | 7 |
Note: Drying time is affected by temperature, humidity and film thickness.
For optimal adhesion, apply the topcoat while the primer is not fully cured. If the primer is exposed to sunlight for a long time before overcoating, the surface must be cleaned and roughened to ensure good intercoat adhesion.
Substrate Treatment
- Steel substrate: Blast cleaning to Sa2.5; manual power tool cleaning to St3.
- Non-metallic substrate: Completely degrease, remove impurities and loose surface layers; eliminate surface free water.
- Recommended surface roughness: 40–75 μm.
- Water-soluble salt limit: ≤ 50 mg/m² (calculated as NaCl).
Construction Conditions
- No free water on the substrate surface.
- Ambient temperature shall not be lower than 0 ℃ during coating; when matching with polyurethane or polyurea, ambient temperature shall not be lower than 10 ℃.
- Substrate surface temperature shall be at least 3 ℃ above dew point. Measure temperature and humidity near the substrate.
- Do not apply coating in heavy rain, snow, sandstorm or other severe weather.
- Maintain good ventilation and isolate all ignition sources on site.
Packaging Specification
- Component A: 15 kg/drum
- Component B: 5 kg/drum
Storage
Store indoors in a cool, dry and ventilated warehouse at 5 ℃ ~ 30 ℃. Keep away from heat and ignition sources and keep containers tightly sealed. Shelf life: 12 months from the production date.
Safety Precautions
All open flames are strictly prohibited during material mixing and construction; ensure adequate ventilation at all times. Operators must wear full personal protective equipment and avoid direct skin contact. In case of skin contact, clean immediately with suitable solvent or soapy water. In case of eye splashing, rinse continuously with plenty of clean water while keeping eyes open and seek medical attention immediately.
Disclaimer
This document is compiled based on practical tests and on-site experience for construction guidance only. Due to differences in coating environments and supporting systems, users are recommended to conduct pre-application trials according to actual working conditions. Our company only guarantees the inherent quality and stability of the product itself. When our technical personnel are not present on site, our liability is limited solely to product quality.
The protective performance of any coating largely depends on construction quality, substrate treatment and film thickness, which directly affect service life. Users shall comply with specified construction conditions during application.
Company Name: Wanhua Energysav Science&technology Group Co.,Ltd
Address: No. 127, Changjiang Road, YEDA, Yantai, Shandong Province, China
Contact person: Vivin Yi
Email: wanhuachemical@outlook.com
WhatsAPP: +86 17761309662
Tel: +86 17761309662
Wechat: yivonnie
Additional information
| Weight | 25 kg |
|---|
