Hemucryl Primer Hi-Build

Product characteristics

Recommended use

As a primer in water-borne paint systems on interior and exterior steelwork in mildly to moderately corrosive environment.
May also be used as a primer in water-borne paint systems on hot dip galvanized steel, aluminium, and stainless steel in mildly corrosive environment.

Service temperature:

• Maximum, dry exposure only: 120°C [248°F].

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Product safety

Flash point: 74°C [165°F]

VOC content

Legislation	Value	Limit value, phase II (2010)ª
EU	42 g/L [0.35 lb/US gal]	140
US (coatings)	54 g/L [0.45 lb/US gal]	–
US (regulatory)	118 g/L [0.98 lb/US gal]	–
China	42 g/L [0.35 lb/US gal]	–

According to specific legislation, see details in the Explanatory Notes available at Hempel website, hempel.com or at your local Hempel website. VOC values may vary with shade, please consult the Safety Data Sheet, section 9.
ªEU Directive 2004/42/CE.

Handling

Handle with care. Before and during use, observe safety labels on packaging and paint containers and follow all local and national safety regulations.
Always consult Hempel’s Safety Data Sheet for this product along with the Product Data Sheet.

For professional use only.

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Product data

• Product code: 18032
• Standard shade / code:* Light grey 12170
• Gloss: Flat
• Volume solids: 43 ± 2%
• Specific gravity: 1.2 kg/L [10 lb/US gal]
• Reference dry film thickness: 75 micron [3.0 mils]

*Issued by Hempel A/S – May 2025

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Surface preparation

Cleanliness

• Remove oil, grease and other contaminants by suitable detergent cleaning.
• Remove salts, detergents and other contaminants by high pressure fresh water cleaning.

New build:

• Abrasive blasting to min. Sa 2½ (ISO 8501-1) / SP 10 (SSPC).
• Remove dust, blast media and loose materials.

Maintenance and Repair

• Spot abrasive blasting to min. PSa 2½ (ISO 8501-2) / SP 10 (SSPC).
• Minor areas can be cleaned by power tool to St 2 provided the surface is roughened and not polished.
• Remove dust, blast media and loose materials.

Roughness

• Surface profile Medium (G) (ISO 8503-2)

Consult Hempel’s separate Surface Preparation Guidelines for more details.

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Application

Mixing ratio

Stir well before use.

Thinner

Fresh water

Cleaner

Hempel’s Cleaner 98701

Application method

Tool	Thinning max vol.	Application parameters
Airless spray	5%	Nozzle pressure: 130 bar [1900 psi]
		Nozzle orifice: 0.015-0.019″
Brush	8%	Not Applicable

If brush or roller application is used, more coats will be necessary to achieve the specified dry film thickness. For brush or roller application use Hemucryl Brush Agent 99810. Spray data are indicative and subject to adjustment. Pressure is for a material temperature of 20°C [68°F].

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Film thickness

Specification range	Low	High	Recommended
Dry film thickness	50 micron [2.0 mils]	90 micron [3.6 mils]	75 micron [3.0 mils]
Wet film thickness	117 micron [4.7 mils]	210 micron [8.4 mils]	175 micron [7.0 mils]
Theoretical spreading rate	8.6 m²/L [350 sq ft/US gal]	4.8 m²/L [196 sq ft/US gal]	5.7 m²/L [232 sq ft/US gal]

Product may be specified in another film thickness than indicated depending on purpose and area of use.
This will alter spreading rate, drying and curing time and overcoating interval.
Overthickness must be closely controlled and never locally exceed 120 micron [4.8 mils] DFT.
On irregular surfaces it is recommended to employ special care in avoiding over application.

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Application conditions

• To avoid condensation, apply on a clean and dry surface with a temperature that is at least 3°C [5°F] above the dew point.
• Surface temperature must be above 10°C [50°F] during application and curing.

Relative Humidity:

• Relative humidity must be below 80% during curing.
• Relative humidity must be below 80% during application.

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Drying and overcoating

Product compatibility

• Previous coat: None.
• Subsequent coat: According to Hempel’s Specification.
  Recommended product is: Hemucryl Enamel Hi-Build 58030

Drying time

Surface temperature	Surface dry	Through dry	Fully cured
20°C [68°F]	60 min	90 min	7 days

Determined for dry film thickness 75 micron [3.0 mils] at standard conditions, see Hempel’s Explanatory Notes for details.

Drying conditions

• To obtain the drying time stated, it is important to maintain sufficient ventilation during application, drying and curing.
• Condensation on the freshly applied coating should be avoided.

Overcoating details

• The surface must be dry and clean prior to application.

Other remarks

• Hempel’s Specification supersedes any recommendations given in the Product Data Sheets.

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Storage

Shelf life

Ambient temperature	Product shelf life
25°C [77°F]	12 months

Shelf life from date of production, when stored in original, unopened containers.
Thereafter, the product quality must be re-inspected. Storage at elevated temperatures may reduce shelf life.
For advice, please consult Hempel.

Storage conditions

• Temperature must not go below 5°C [41°F] during transport and storage.

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Carbon Footprint

Dry film thickness	GWP (Global Warming Potential)
1 µm	5 g CO₂e/m²
1 mil	0.026 lb CO₂e/ft²

The carbon footprint is for 1 square meter / square foot of surface area with a dry film thickness of 1 micron / mil.
The scope includes raw materials, in-bound transport to the Hempel factory, Hempel manufacturing processes, and any Volatile Organic Compounds emitted during and after the application of the product.
It is calculated based on the standard shade defined in this PDS. Values may vary with shade.

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References

Product Data Sheet – Hemucryl Primer Hi-Build 18032
Issued by Hempel A/S – May 2025
Document Version: 4/4
Source: https://www.hempel.com

Technical Guidelines and Explanatory Notes
Last accessed: 28 May 2025
Reference link: https://www.hempel.com/service-and-support/technical-guidelines

Note: Always consult the latest version of the Product Data Sheet and associated documents directly from Hempel’s official website to ensure accuracy and compliance with the most current recommendations.