Resist 78 Inorganic Zinc Silicate Primer is a zinc-rich primer. In the industrial protective coatings sector: suitable for steel structures or pipelines exposed to highly corrosive environments C5I or C5M (ISO 12944-2). Meets the composition requirements of SSPC Paint 20 Level 2 and ISO 12944-5. Parameters on this page: volume solids 72 ± 2%; dry film thickness 50–90 µm; theoretical spreading rate 14.4–8 m²/L. Comparable products from the same brand: Resist 60 Inorganic Zinc Silicate Primer 5DG, Resist 65 Inorganic Zinc Silicate Primer, Resist 78 KV Inorganic Zinc Silicate Primer.
Source: JOTUN original technical data sheet (TDS) 'Resist 78 Inorganic Zinc Silicate Primer'. Spreading rate and other values converted from the TDS; for 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 | 72 ± 2% |
|---|---|
| Dry Film Thickness | 50–90 µm |
| Theoretical Spreading Rate | 14.4–8 m²/L |
| VOC | 417 g/L (China) |
| Density / Specific Gravity | 2.5 kg/L |
| Number of Components | Two-component |
| Flash Point | 14 °C |
| Thinner | JOTUN Thinner No. 4 / Jotun Thinner No. 25… |
| Mixing Ratio | 9 parts : 2.6 parts (by volume) |
For more Q&A on selection, application, acceptance and defect diagnosis, seeFAQsection.
Resist 78
This is a two-component, moisture-curing inorganic zinc silicate coating with fast curing and high zinc content.
Complies with the composition requirements of SSPC Paint 20 Level 2 and ISO 12944-5. It has high anticorrosive performance and can be used with other coatings. Heat resistant up to 540 °C. Used as a primer in atmospheric environments. For properly prepared carbon steel substrates only. The zinc dust in this product complies with ASTM D520, Type II.
Industrial protective coatings:
Suitable for steel structures or pipelines exposed to highly corrosive environments C5I or C5M (ISO 12944-2). Recommended for offshore environments, such as refineries, power stations, bridges, buildings and mining equipment. Specially used as a primer in conjunction with other coatings for better durability.
Others
Suitable for bolted/riveted joints requiring high-strength friction:
Meets the requirements of Class B, Appendix A (slip coefficient and tension creep resistance) of the Research Council on Structural Connections (RCSC).
Other certificates and approvals are available on request.
Grey
| Property | Test / Standard | Description |
| Volume Solids | OCCA Monograph No. 4 | 72± 2 % |
| Gloss (GU 60°) | ISO 2813 | Matt (0–35) |
| Flash Point | ISO 3679 Method 1 | 14 °C |
| Density | Theoretical Value | 2.5 kg/L |
| Region | Regulations | Test / Standard | VOC Value |
| US | CARB(SCM)2020 / SCAQMD rule 1113 | US EPA Method 24 | 362 g/L |
| Hong Kong | Air Pollution Control (VOC) Regulation | 362 g/L | |
| EU | European Paint Directive 2004/42/CE | Calculation | 485 g/L |
| China | Mandatory national standard of China | GB 30981.2-2025 | 417 g/L |
| Coating hazards GB | 30981.2-S-Pb≤1000-NC |
The data listed are based on factory batch production and may vary slightly with colour.
| Gloss description | According to JOTUN's definition of functional coatings |
|---|
Typical recommended specification range
| Dry Film Thickness | 50–90 µm |
| Wet Film Thickness | 70–125 µm |
| Theoretical Spreading Rate | 14.4–8 m²/L |
Surface Preparation
| Substrate | Minimum | Recommended |
| Carbon Steel | Sa 2½ (ISO 8501-1); surface roughness fine to medium G (ISO 8503-2) | |
This product may be applied by the following methods
| Spray: | Apply by air spray or airless spray. |
| Brush: | Recommended for touch-up and small-area application. Take care to achieve the specified dry film thickness. To avoid settling of the zinc dust, mechanical agitation during application is recommended. |
| Resist 78 Comp A — Inorganic Zinc Silicate Primer 0JR, Component A | 9 parts |
| Jotun Zinc 100 Comp B — JOTUN Inorganic Zinc Silicate Primer/Tank Coating Series, Component B | 2.6 parts |
Component A is a liquid and Component B is dry zinc dust. Shake Component A thoroughly before use. While stirring mechanically, slowly pour the zinc dust into the liquid. Stir until free of lumps and strain through a 60-mesh screen.
| Thinner | JOTUN Thinner No. 4 / Jotun Thinner No. 25, JOTUN Thinner No. 25 / Jotun Thinner No. 4 |
|---|---|
| JOTUN Thinner No. 4 | To accelerate evaporation |
Jotun Thinner No. 25
| JOTUN Thinner No. 25 | To slow evaporation |
|---|
JOTUN Thinner No. 28 may be used in place of JOTUN Thinner No. 4 as a fast-evaporating thinner.
Normally no thinning is required. For application under extreme conditions, consult the local JOTUN representative. Do not thin beyond the requirements of local environmental regulations.
| Note | Where the Korean VOC regulation (Clean Air Conservation Act) and its corresponding thinning limits differ from the recommended thinning volume, the former prevails. |
|---|
JOTUN Thinner No. 17 may be used as an alternative cleaner.
| Nozzle tip size (inch/1000): | 17-21 |
| Nozzle pressure (minimum): | 100 bar/1400 psi |
| Substrate Temperature | 5 °C | 10 °C | 23 °C | 40 °C |
| Touch Dry | 1 h | 30 min | 15 min | 13 min |
| Walk-on Dry | 1.5 h | 45 min | 30 min | 25 min |
| Minimum recoat interval | 18 h | 13 h | 4 h | 1.5 h |
| Dry/cured to service | 18 h | 13 h | 4 h | 1.5 h |
For the maximum recoat interval, refer to the Application Guide (AG) for this product.
The average dry film thickness, drying and curing times during application and curing, and the recoat interval of the inorganic zinc silicate should be measured at controlled temperature and 70% relative humidity. Higher relative humidity increases the curing rate.
If the relative humidity during application is below 60%, curing of the coating will be affected. Jotun Zinc 100 LHA may be used to accelerate curing. For more information, refer to the application guide.
| Touch Dry | The state at which light finger pressure leaves no mark or stickiness. |
|---|---|
| Walk-on Dry | The minimum time after which the coating allows normal foot traffic without leaving permanent footprints, marks or other physical damage. |
Minimum recoat interval after drying: the recommended minimum interval before applying the next coat.
Dry/cured to service: the minimum time before the coating can be permanently exposed to a specific environment/medium.
| Paint temperature | 23 °C |
| Pot Life | 8 h |
Temperature
| Continuous | Peak | |
| Drying, atmospheric | 400°C | 540 °C |
Withstands peak temperatures for a maximum of one hour.
At the above temperatures, protective performance is unaffected, but appearance may be affected.
At a dry film thickness of 50 µm with a suitable topcoat, the product withstands prolonged dry heat of 400 °C to 540 °C (i.e. 1004 °F). For the corresponding temperatures, the recommended inorganic zinc silicate is Jotatemp 540 Zinc for better durability.
Depending on the actual exposure conditions in service, this product may be used with various primers and topcoats. Some reference systems are listed below. For specific systems, contact JOTUN.
| Subsequent Coat | Epoxy, silicone acrylic |
|---|
| Volume | Container Size | |
| (L) | ||
| Resist 78 Comp A — Inorganic Zinc Silicate Primer 0JR, Component A | 9 | 10 |
| Jotun Zinc 100 Comp B — JOTUN Inorganic Zinc Silicate Primer/Tank Coating Series, Component B | 2.6 | 20 |
The packaging sizes above are typical reference sizes for factory batch production. Due to regional regulatory differences, packaging sizes and capacities may vary by region.
Store in accordance with national regulations. Keep containers in a dry, cool, well-ventilated place away from heat and sources of ignition. Keep containers tightly closed. Handle with care.
| Resist 78 Comp A — Inorganic Zinc Silicate Primer 0JR, Component A | 6 months |
| Jotun Zinc 100 Comp B — JOTUN Inorganic Zinc Silicate Primer/Tank Coating Series, Component B | 48 months |
In some markets, the stated shelf life may be shortened to comply with local legal requirements. The above is the minimum shelf life; thereafter, testing is required to confirm quality remains acceptable.
For professional use only. Applicators and workers must be trained, experienced, capable and equipped to mix, stir and apply the coating correctly in accordance with JOTUN's technical documents. Applicators and workers must wear appropriate personal protective equipment when using this product. This guidance is provided based on current product knowledge. Any proposed modification to suit site conditions must be approved by the responsible JOTUN representative before use.
Read the safety warnings on the container packaging. Use in well-ventilated conditions. Avoid inhaling spray mist and avoid skin contact. In case of accidental splashes on skin, wash immediately with a suitable cleaner, soap and water. In case of eye contact, rinse thoroughly with water and seek medical attention immediately.
When used primarily as a primer or antifouling coating, products may show slight colour variation from batch to batch. Such products, and epoxy products used as topcoats, may chalk when exposed to sunlight.
Gloss and colour retention of topcoats depend on the colour type, the surrounding environment such as temperature and UV intensity, application quality and product type. Contact your local JOTUN office for further information.
The information in this datasheet is based entirely on knowledge gained in our laboratory and in practice. JOTUN products are regarded as semi-finished products, and their use is generally beyond our control. JOTUN therefore guarantees only the quality of the product itself. To comply with local regulations, the product may be adjusted, and we reserve the right to modify the datasheet without further notice.
Users should consult JOTUN for specific guidance on the suitability of the product for their requirements and applications.
In case of any discrepancy between language versions, the English (UK) version shall prevail.
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.
Packaging specifications and batch lead times are subject to actual availability. PleaseContact Uscontact us for project-based calculation.
