Galvosil Fibre 15750

Product characteristics

Recommended use
Hempel’s Galvosil Fibre 15750 is recommended as a general purpose, heavy-duty, rust-preventing primer for newbuild and maintenance. Suitable for structural steel and piping. Recommended for a wide range of atmospheric corrosivity environments up to extreme (offshore).
Can be used as a single, complete coating for long-term protection of steel exposed to moderately to severely corrosive environment and abrasion. Especially recommended for steelwork where local areas (e.g. corners) can be expected to have high film thickness (up to a dry film thickness of 200 microns).

Service temperature:

• Without topcoat: maximum, dry, atmospheric exposure: 500°C [932°F].
• With a suitable topcoat: maximum, dry, atmospheric exposure: 540°C [1004°F], peak: 600°C [1112°F].
• Wet service temperatures: Please consult the Chemical protection guide at hempel.com.

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Product safety

Flash point
14°C [57°F]

VOC content mixed product

Legislation	Value
EU	458 g/L [3.82 lb/US gal]
US (coatings)	535 g/L [4.46 lb/US gal]
US (regulatory)	545 g/L [4.55 lb/US gal]
China	535 g/L [4.46 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.

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: 15750
• Product components: Base 15759, Zinc 97170
• Standard shade / code: Grey 19840
• Gloss: Flat
• Volume solids: 62 ± 2%
• Specific gravity: 2.4 kg/L [20 lb/US gal]
• Reference dry film thickness: 75 micron [3.0 mils]

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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

• According to Hempel’s Specification.

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
Base 15759 : Zinc 97170 (9.2 : 15 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

Cleaner
Hempel’s Thinner 08700

Pot life

Product temperature	Pot life
10°C [50°F]	8 hours
20°C [68°F]	4 hours

Application method

Tool	Thinning max vol.	Application parameters
Airless spray	30%	Nozzle pressure: 100 bar [1500 psi], Nozzle orifice: 0.019–0.023″
Air spray	35%	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. 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	Dry film thickness	Wet film thickness	Theoretical spreading rate
Low	40 micron [1.6 mils]	64 micron [2.6 mils]	16 m²/L [652 sq ft/US gal]
High	125 micron [5.0 mils]	201 micron [8.1 mils]	5 m²/L [204 sq ft/US gal]
Recommended	75 micron [3.0 mils]	121 micron [4.8 mils]	8.3 m²/L [338 sq ft/US gal]

Overthickness must be closely controlled and never locally exceed 250 micron [10 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.

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 (hours)
0°C [32°F]	90	48
10°C [50°F]	40	23
20°C [68°F]	15	10
30°C [86°F]	6	5

Determined for dry film thickness 75 micron [3.0 mils] at standard conditions, see Hempel’s Explanatory Notes for details. The drying times of moisture curing products will depend on the relative humidity, therefore drying times in the field could vary.

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

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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.

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Carbon Footprint

Dry film thickness	GWP (Global Warming Potential)
1 µm	19.3 g CO₂e/m²
1 mil	0.1 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 –Galvosil Fibre 15750
  Issued by Hempel A/S – October 2024
  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.