Inorganic Zinc Silicate Shop Primer 704 is an inorganic zinc silicate coating for use as a primer. It is used as a shop primer in steel pretreatment lines at shipyards, heavy machinery plants, and steel structure fabrication facilities. It is a two-component inorganic zinc silicate shop primer composed of alkyl silicate, zinc dust, and additives. Zinc dust provides cathodic protection and anti-corrosive performance; at DFT 20 µm, the protection period is 6–9 months. Heat resistance: the film withstands temperatures up to 400°C, with a small burn-off area during welding and cutting. The film has impact resistance, abrasion resistance, and moderate flexibility. Parameters on this page: volume solids 38 ± 3% (mixed), DFT 20 µm, theoretical spreading rate 90 g/m².
Parameter source: KAILIN original technical data sheet (TDS) 'Inorganic Zinc Silicate Shop Primer 704'; values such as spreading rate are converted from TDS parameters and are for selection reference only.
The above content is compiled from the manufacturer's datasheet and this site's parameter tables. For selection, coating systems and lead times, pleaseContact Usfor confirmation.
This page carries the full TDS for this product, translated from the manufacturer's original document. No file download is needed; for an original-language copy, send an enquiry.
| Volume Solids | 38 ± 3% (mixed) |
|---|---|
| Dry Film Thickness | 20µm |
| Theoretical Spreading Rate | 90 g/m² |
| VOC | — |
| Density / Specific Gravity | — |
| Number of Components | Two-component |
| Thinner | Thinner 107 |
| Mixing Ratio | Component A : Component B = 2:1 (by weight) |
| Colour / Appearance | Grey matt |
| Composition | Two-component inorganic zinc silicate shop primer composed of alkyl silicate, zinc dust, and additives. |
|---|
Zinc dust provides cathodic protection and excellent anti-corrosive performance; at DFT 20 µm, protection period 6–9 months.
Excellent heat resistance; the film withstands temperatures up to 400°C, with a small burn-off area during welding and cutting.
Excellent impact resistance, good abrasion resistance and moderate flexibility.
| Use | Used as a shop primer in steel pretreatment lines at shipyards, heavy machinery plants, and steel structure fabrication facilities. |
|---|---|
| Appearance | Grey matt |
Volume solids 38±3% (determined in accordance with GB/T9272 eqv ISO3233:1998) (mixed)
| Mixing ratio | Component A : Component B = 2:1 (by weight) |
|---|---|
| Dry Film Thickness | 20µm |
| Wet Film Thickness | 53µm |
| Theoretical quantity | 90g/m² |
| Flash Point | Component A (zinc dust slurry) 13°C; Component B (base) 13°C |
| Drying Time | (25°C) |
| Table | Dry ≤ 5 min |
| Practical | Dry ≤ 1 h |
Conveyor line drying time (steel preheated to 50°C, oven tunnel temperature 120°C) ≤ 5 min
Recoating interval: minimum recoating interval 8 h or more; before painting, wipe the 704 paint film with a cloth moistened with Thinner 107.
film surface to determine whether fully cured. If zinc dust dissolves on the cloth, this indicates
that the film is not fully cured and drying shall continue; when relative humidity is below 70%,
water may be sprinkled on the film to cure the film; dry until no colour (no dissolution
remains on the cloth, indicating the film is fully cured; only then may the subsequent coat be applied.
Maximum recoating interval unlimited, but zinc salts must be removed before recoating.
| Pot life (after mixing components A and B) | |||
| Temperature | 5°C | 20°C | 30°C |
| Pot life | 24h | 12h | 6h |
| Recommended number of coats | Airless spray 1 coat, DFT 20 µm. |
|---|
Can be used with coatings of chlorinated rubber, epoxy, epoxy tar, bituminous, polyurethane, vinyl and other systems
but not with oil-based, alkyd or polyester paints.
| Surface Preparation | Blast clean steel to Sa2.5 with a surface profile of 30–75 µm |
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When the substrate temperature is too high (≥ 40 °C), spray application is required, but the substrate temperature shall not
exceed 60 °C. To avoid dry spray, add Thinner 107 until dry spray is eliminated
| Airless Spray | |
| Thinner | Thinner 107 |
| Thinning quantity | 0–10% (by paint weight) * guard against dry spray |
| Nozzle tip size | 0.4-0.5mm |
| Spray output pressure | 15 MPa (approx. 150 kg/cm²) |
| Air Spray | |
| Thinner | Thinner 107 |
| Thinning quantity | 0–10% (by paint weight) * guard against dry spray |
| Nozzle tip size | 2.0-2.5mm |
| Air pressure | 0.3–0.6 MPa (approx. 3–6 kg) |
| Roller/brush | |
| Not recommended for large-area application; for small-area repair only. | |
| Thinner | Thinner 107 |
| Thinning quantity | 0–5% (by paint weight) |
| Cleaning solvent | Thinner 107 |
|---|---|
| Safety measures | See the Safety Data Sheet (MSDS) of Shanghai Kailin Paint Factory. |
| Packaging | Component A (zinc dust slurry): 20 L drum, 20 kg; Component B (base): 10 L drum, 10 kg |
| Shelf Life | 6 months |
Stir continuously with a mechanical mixer during application to prevent zinc dust settling.
When applying at ambient temperature above 30°C, addition of 0–10% Thinner 107 is required to prevent dry spray.
The maximum recoating interval for 704 inorganic zinc primer is unlimited, but before applying the subsequent paint
zinc salts formed on the film surface must be thoroughly removed; otherwise, intercoat adhesion and protective performance of the film will be affected.
| Notes | To use this product correctly, read the Application Guide in this data sheet carefully. |
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The above information and data for this product are accumulated from our tests and practical experience
accumulated, and may serve as an application guide. For application carried out under conditions unknown to us, we
we guarantee only the quality of the paint itself and accept no responsibility for other matters. We
We reserve the right to make modifications as the product is improved.
Information is subject to the manufacturer's latest version; the manufacturer's latest TDS prevails.
The technical parameters on this page are taken from the product's original manufacturer technical datasheet, the copyright of which belongs to the manufacturer. If a rights holder considers the presentation inappropriate, contact us for verification and handling.
For more Q&A on selection, application, acceptance and defect diagnosis, seeFAQsection.
Packaging specifications and batch lead times are subject to actual availability. PleaseContact Uscontact us for project-based calculation.
