Galvosil 15780

PRODUCT DATASHEET

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Product characteristics

Recommended use

As a general purpose rust-preventing primer in paint systems for long-life protection of steel exposed to moderately to severely corrosive environment. In compliance with SSPC-Paint 20, type 1, level 2.

Service temperature

• Without topcoat: maximum, dry, atmospheric exposure: 540°C [1004°F].
• Wet service temperatures: Please consult the Chemical protection guide at hempel.com.

Product safety

Flash point

14°C [57°F]

VOC content mixed product

Legislation	Value
EU	471 g/L [3.93 lb/US gal]
US (coatings)	471 g/L [3.93 lb/US gal]
US (regulatory)	471 g/L [3.93 lb/US gal]
China	471 g/L [3.93 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. According to EPA Method 24.

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.

Product data

Product code	15780
Product components	Base 15789, Zinc 97170
Standard shade / code	Grey 19840
Gloss	Flat
Volume solids	62 ± 2%
Specific gravity	2.3 kg/L [19 lb/US gal]
Reference dry film thickness	50 micron [2.0 mils]

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

• According to Hempel’s Specification.

Roughness

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

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

Application

Mixing ratio

Base 15789 : Zinc 97170 (4.2 : 5.8 by weight)
Products containing floating or settling particles/pigments need to be continuously stirred during application. This is especially important in case of heavy thinning.

Thinner

Hempel’s Thinner 08700 / Hempel’s Accelerator & Thinner 0870M

Cleaner

Hempel’s Thinner 08700

Pot life

Product temperature	Pot life
20°C [68°F]	4 hours

Application method

Tool	Thinning max vol.	Application parameters
Airless spray	10%	Nozzle pressure: 100 bar [1500 psi], Nozzle orifice: 0.019-0.023″
Air spray	10%	Not Applicable
Brush	10%	Not Applicable

To minimise dry spray at high temperatures, extra thinning may be necessary. If brush or roller application is used, more coats will be necessary to achieve the specified dry film thickness.

Film thickness

	Low	High	Recommended
Dry film thickness	50 micron	80 micron	50 micron
Wet film thickness	81 micron	129 micron	81 micron
Theoretical spreading rate	12 m²/L	7.7 m²/L	12 m²/L

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 0°C [32°F] during application and curing.
• Surface temperature must be below 40°C [104°F] during application and curing.

Relative Humidity

• Relative humidity must be above 50% during curing.

Application remarks

• Consult Hempel’s Application Guidelines and Instructions for more details.

Drying and overcoating

Product compatibility

• Previous coat: None.
• Subsequent coat: According to Hempel’s Specification.

Drying time

Surface temperature	Touch dry min	Fully cured
20°C [68°F]	15 min	16 hours

Overcoating

Overcoating times are indicative for products of the same generic chemistry. Consult Hempel’s specification for more information.

Drying conditions

• To obtain the drying time stated, it is important to maintain sufficient ventilation during application, drying and curing.

Overcoating details

• Remove zinc salts or other contamination before overcoating.
• Flash-coat technique is recommended when overcoating Galvosil qualities.
• Inorganic zinc silicates must be fully cured before overcoating.

Storage

Shelf life

Ambient temperature	Base	Zinc
25°C [77°F]	6 months	36 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

• Must be stored under absolutely dry conditions, protect against seeping humidity.

Carbon Footprint

Dry film thickness	GWP
1 µm	17.6 g CO₂e/m²
1 mil	0.092 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.

References

Product Data Sheet – Hempel’s Galvosil 15780
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.