Muki CZ Inorganic Zinc Shop Primer CZ is an inorganic zinc silicate coating used as a primer. As a primer, especially suitable for protecting areas with a high risk of backside burn-through during construction. A shop primer specially designed for fast welding and cutting, effectively reducing porosity and backside burn-through caused by welding or cutting. Parameters on this page: volume solids 28 ± 2%; dry film thickness 15–35 µm; theoretical spreading rate 18.7–8 m²/L. Comparable products from the same brand: Muki Z 2001 Inorganic Zinc Shop Primer 2001, Muki Z 2008 Inorganic Zinc Shop Primer 2008, Muki Z 1000 WF Water-borne Inorganic Zinc Shop Primer 1000.
Source: JOTUN original technical data sheet (TDS) 'Muki CZ Inorganic Zinc Shop Primer CZ'. 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 | 28 ± 2% |
|---|---|
| Dry Film Thickness | 15–35 µm |
| Theoretical Spreading Rate | 18.7–8 m²/L |
| VOC | 650 g/L (US) |
| Density / Specific Gravity | 1.5 kg/L |
| Number of Components | Two-component |
| Flash Point | 14 °C |
| Thinner | JOTUN Thinner No. 4 / JOTUN Thinner No. 25 |
| Mixing Ratio | 10 parts : 6 parts (by volume) |
For more Q&A on selection, application, acceptance and defect diagnosis, seeFAQsection.
Muki CZ
A two-component inorganic zinc silicate ceramic coating. A shop primer specially designed for fast welding and cutting, effectively reducing porosity and backside burn-through caused by welding or cutting. Fast-drying with good abrasion resistance, suitable for stacking soon after application. Can be used as a temporary protection primer during the newbuilding stage, or as a primer in a complete coating system in atmospheric and immersed environments. Can be applied alone. Withstands short-term temperatures up to 800 °C, preventing burn-through from welding or cutting. Suitable for suitably prepared carbon steel substrates, recommended for automated shop primer lines. Compatible with advanced welding techniques including MIG, MAG and GFCAW.
Recommended for structural steel including ships, offshore environments and refineries. As a primer, especially suitable for protecting areas with a high risk of backside burn-through during construction.
Others
Dark grey
| Property | Test / Standard | Description |
| Volume Solids | ISO 3233 | 28± 2 % |
| Gloss (GU 60°) | ISO 2813 | Matt (0–35) |
| Flash Point | ISO 3679 Method 1 | 14 °C |
| Density | Theoretical Value | 1.5 kg/L |
| Region | Regulations | Test / Standard | VOC Value |
| US | CARB(SCM)2020 / SCAQMD rule 1113 | Calculation | 650 g/L |
| Hong Kong | Air Pollution Control (VOC) Regulation | Calculation | 650 g/L |
| EU | European Paint Directive 2004/42/CE | Calculation | 624 g/L |
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 | 15–35 µm |
| Wet Film Thickness | 55–125 µm |
| Theoretical Spreading Rate | 18.7–8 m²/L |
Surface Preparation
| Substrate | Minimum | Recommended |
| Carbon Steel | Sa 2½ (ISO 8501-1) | |
St 2 applies to the back of welds, and structural surfaces under insulation.
This product may be applied by the following methods
| Spray: | Apply by air spray or airless spray. |
| Brush: | Recommended for repair. |
| Inorganic Zinc Shop Primer CZ, Component A | 10 parts |
| Inorganic Zinc Shop Primer CZ, Component B | 6 parts |
| Thinner | JOTUN Thinner No. 4 / JOTUN Thinner No. 25 |
|---|---|
| JOTUN Thinner No. 4 | To accelerate evaporation |
| 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.
JOTUN Thinner No. 17 may be used as an alternative cleaner.
In China, the cleaning solvent must comply with GB 38508-2020
| Nozzle tip size (inch/1000): | 15-23 |
| Nozzle pressure (minimum): | 50 bar/700 psi |
| Substrate Temperature | 23 °C | 40 °C |
| Touch Dry | 1 min | 20 s |
| Walk-on Dry | 3 min | 1 min |
| Minimum recoat interval | 2 days | 1 day |
| Dry/cured to service | 2 days | 1 day |
For the maximum recoat interval, refer to the Application Guide (AG) for this product.
Drying and curing times are determined based on temperature and relative humidity below 85%, with dry film thickness within the average range.
| 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 | 24 h |
Dry, atmospheric environments:
Continuous: 400 °C. Peak: 800 °C. Immersed, seawater:
| Continuous | 50 °C. Peak: 50 °C. Withstands short-term temperatures up to 800 °C, preventing burn-through from welding or cutting. |
|---|
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, alkyd, acrylic, modified epoxy, zinc-containing epoxy |
|---|
| Volume | Container Size | |
| (L) | ||
| Inorganic Zinc Shop Primer CZ, Component A | 10 | |
| Inorganic Zinc Shop Primer CZ, Component B | 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.
| Inorganic Zinc Shop Primer CZ, Component A | 6 months |
| Inorganic Zinc Shop Primer CZ, Component B | 24 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.
