Hempaprime Core 500

PRODUCT DATASHEET

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Product characteristics

Recommended use
Hempaprime Core 500 is recommended as a self-primed, surface tolerant paint system or as an intermediate in heavy duty paint systems where low VOC and high film build are required. For atmospheric service as an intermediate or as a primer in coating systems for new construction and maintenance.

Service temperature:

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

Certificates / Approvals

• Third-party verified, product-specific Environmental Product Declaration (Type III EPD, ISO 14025, EN 15804)
• Meets requirements to ISO 12944 when used as part of a predefined paint system. Part 6, C5VH.

Features

• Low VOC.
• High solid.
• Ready to use due to optimized application properties.
• Can contribute to points for LEED projects (Low-emitting materials, Environmental Product Declarations).

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Product safety

Flash point
24°C [75°F]

VOC content mixed product

Legislation	Value
EU	198 g/L [1.65 lb/US gal]
US (coatings)	198 g/L [1.65 lb/US gal]
US (regulatory)	198 g/L [1.65 lb/US gal]
China	198 g/L [1.65 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.

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
47680

Product components
Base 47689
Curing Agent 97068

Standard shade / code*
Grey 11480 **

Gloss
Flat

Volume solids
81 ± 2%

Specific gravity
1.5 kg/L [13 lb/US gal]

Reference dry film thickness
125 micron [5.0 mils]

*Other shades are available, including shades containing aluminium. Please contact your local Hempel representative.
**Colour stability may be affected by exposure to harsh chemical and/or high temperatures.

Micaceous iron oxide (MIO) shade / code
Metallic grey 12430

Gloss
Flat

Volume solids
81 ± 2%

Specific gravity
1.6 kg/L [13 lb/US gal]

Reference dry film thickness
125 micron [5.0 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

• Minor areas may be hand or power tool cleaned instead of abrasive blasting.
• Areas of intact existing coating should be treated either by abrasive sweep blasting or water jetting to give a dense and uniform roughness of the existing coating to ensure adhesion.
• Feather edges to sound surrounding coating.
• 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
Base 47689 : Curing Agent 97068
(4.5 : 1 by volume)
Do not dilute the components separately – only the mixture. Keep thinning at an absolute minimum. Stir well before use.

Thinner
Hempel’s Thinner 08450

Cleaner
Hempel’s Tool Cleaner 99610
Hempel’s Thinner 08450

Pot life

Product temperature	0°C [32°F]	20°C [68°F]	40°C [104°F]
Pot life	4 hours	2 hours	½ hours

Application method

Tool	Thinning max vol.	Application parameters
Airless spray	5%	Nozzle pressure: 225 bar [3300 psi], Nozzle orifice: 0.019-0.023″
Air spray	10%	Not Applicable.
Brush	5%	Not Applicable.

Product requires heavy duty spray equipment; spray hoses shall be as short as possible. To minimise dry spray at high temperatures, extra thinning may be necessary. Lower paint temperatures may require extra thinning, which will result in lower film build and slower drying. 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	Low	High	Recommended
Dry film thickness	80 micron [3.2 mils]	200 micron [8.0 mils]	125 micron [5.0 mils]
Wet film thickness	98 micron [3.9 mils]	246 micron [9.8 mils]	154 micron [6.1 mils]
Theoretical spreading rate	10 m²/L [407 sq ft/US gal]	4.1 m²/L [167 sq ft/US gal]	6.5 m²/L [265 sq ft/US gal]

For best performance, avoid excessive film thickness. 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.

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Application conditions

• Optimal paint temperature for proper mixing, pumping and spraying is: 20°C [68°F].
• 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 [14°F] during application and curing.

Relative Humidity:

• Relative humidity must be below 85% during drying and curing.

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Application remarks

• Product requires heavy duty spray equipment; spray hoses shall be as short as possible.

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Drying and overcoating

Product compatibility

• Previous coat: According to Hempel’s Specification.
• Subsequent coat: According to Hempel’s Specification.

Drying time

Surface temperature	0°C [32°F]	10°C [50°F]	20°C [68°F]	40°C [104°F]
Touch dry hours	8	4	1½	½
Hard dry hours	20	10	4	2
Fully cured days	30	14	7	3

Determined for dry film thickness 125 micron [5.0 mils] at standard conditions, see Hempel’s Explanatory Notes for details.

Overcoating
Hempel’s specification supersedes any guidelines indicated in the overcoating table.

Quality name	-10°C [14°F]	0°C [32°F]	10°C [50°F]	20°C [68°F]
Atmospheric mild – Hempaprime Core 500	Min 27 h / Max Ext*	13 h / Ext*	6 h / Ext*	3 h / Ext*
Hempathane HS 55610	27 h / Ext*	13 h / Ext*	6 h / Ext*	3 h / Ext*
Atmospheric medium – Hempaprime Core 500	27 h / Ext*	13 h / Ext*	6 h / Ext*	3 h / Ext*
Hempathane HS 55610	27 h / 40 d	13 h / 40 d	6 h / 40 d	3 h / 20 d
Atmospheric severe – Hempaprime Core 500	27 h / 60 d	13 h / 60 d	6 h / 60 d	3 h / 30 d
Hempathane HS 55610	27 h / 10 d	13 h / 10 d	6 h / 10 d	3 h / 5 d

*Ext: Depending on the actual exposure conditions, the coated surface is overcoatable for an extended period of time. Contact your local Hempel representative for advice.
Overcoating times are indicative for products of the same generic chemistry. Consult Hempel’s specification for more information.

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Drying conditions

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

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Overcoating details

• Flash-coat technique is recommended when overcoating Galvosil qualities.
• If the maximum overcoating interval is exceeded, roughening of the surface is necessary to ensure intercoat adhesion.
• The surface must be dry and clean prior to application.

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Other remarks

• Hempel’s Specification supersedes any recommendations given in the Product Data Sheets.
• Epoxy coatings have an inherent tendency of chalking, fading and discolouring. This does not affect the performance of the coating.

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Storage

Shelf life

Ambient temperature	Base	Curing Agent
25°C [77°F]	24 months	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.

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Carbon Footprint

Dry film thickness	1 µm	1 mil
GWP (Global Warming Potential)	5.3 g CO₂e/m²	0.028 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 – Hempaprime Core 500
Issued by Hempel A/S – June 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.