Hempaprime Multi 500

PRODUCT DATASHEET

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PRODUCT CHARACTERISTICS

Recommended use

Hempaprime Multi 500 is recommended as a high-build, intermediate coat in high performance coating systems where fast handling and short overcoating times are required. Due to its fast drying, the product is excellent for projects where fast throughput is key. The product can also be used as a self-priming, surface tolerant coat and a finishing coat in heavy-duty coating systems. Suited for application down to 10°C [50°F].
The product is available in several MIO shades such as 18021 and 18061; both with 80% MIO content and with volume solids 82% ± 2. Other MIO shades like 12430, 16980 and non-MIO Grey 13600 are available, and comply with volume solids 85% ± 2.

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, Im2; Part 9, CX
• Meets requirements to NORSOK M-501 when used as part of a predefined paint system. Edition 6, System 1. Edition 7, System 1A, 1B
• Complies with the requirements in EN1504-2 for protection and repair of concrete structures, meeting CE Mark performance qualification

Features

• Fast overcoating
• Crack resistant in high film thickness
• Low VOC
• Ready to use – optimised application properties
• Surface tolerant
• Can contribute to LEED points (Low-emitting materials, Environmental Product Declarations)

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PRODUCT SAFETY

Flash point

25°C [77°F]

VOC content mixed product

Legislation	Value
EU	196 g/L [1.64 lb/US gal]
US (coatings)	196 g/L [1.64 lb/US gal]
US (regulatory)	196 g/L [1.64 lb/US gal]
China	196 g/L [1.64 lb/US gal]

According to specific legislation. VOC values may vary with shade; please consult the Safety Data Sheet, section 9.

Handling

Handle with care. Observe safety labels and regulations. Always consult Hempel’s Safety Data Sheet and Product Data Sheet.
For professional use only.

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PRODUCT DATA

Product code: 45950
Base / Curing Agent: 45959 / 95090
Standard shade / code: Brownish red 50630*
Gloss: Semi-gloss
Volume solids: 85 ± 2%
Specific gravity: 1.4 kg/L [12 lb/US gal]
Reference DFT: 150 micron [6.0 mils]
Aluminium shade / code: Aluminium grey 19002
Volume solids: 78 ± 2%
Specific gravity: 1.3 kg/L [11 lb/US gal]
Reference DFT: 150 micron [6.0 mils]

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SURFACE PREPARATION

Cleanliness

• Remove oil, grease with detergent.
• High-pressure fresh water cleaning for salts/contaminants.

New build

• Abrasive blasting: min. Sa 2½ (ISO 8501-1) / SP 10 (SSPC)
• Non-ferrous metals: sweep blast with non-metallic media
• Remove dust and loose material

Maintenance and Repair

• Spot blast to PSa 2 / SP 6
• Minor areas: St 2 power tools acceptable
• Water jetting: Wa 2, max flash rust FR M
• Sweep blast for non-ferrous metals
• Feather edges to sound coating
• Remove dust and loose material

Roughness

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

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APPLICATION

Mixing ratio: Base 45959 : Curing Agent 95090 = 4:1 by volume
Thinner: Hempel’s Thinner 08450
Cleaner: Hempel’s Tool Cleaner 99610 or Thinner 08450

Pot life

Temperature	Pot life
10°C [50°F]	2½ hours
20°C [68°F]	1 hour
30°C [86°F]	¾ hour
40°C [104°F]	½ hour

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APPLICATION METHOD

Tool	Thinning Max Vol.	Application Parameters
Airless spray	5%	Nozzle pressure: 225 bar [3300 psi], Orifice: 0.019–0.023″
Brush/Roller	5%	Not Applicable

Brush/roller use may require multiple coats. Pressure noted for 20°C [68°F] product temperature.

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FILM THICKNESS

Parameter	Low	High	Recommended
Dry film thickness (DFT)	100 micron [4.0 mils]	250 micron [10 mils]	150 micron [6.0 mils]
Wet film thickness (WFT)	118 micron [4.7 mils]	295 micron [12 mils]	177 micron [7.1 mils]
Theoretical spreading rate	8.5 m²/L [346 ft²/gal]	3.4 m²/L [139 ft²/gal]	5.6 m²/L [228 ft²/gal]

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APPLICATION CONDITIONS

• Product temperature: ideally 20°C [68°F]
• Surface temperature: must be >10°C [50°F]
• Dew point: surface temp ≥ 3°C [5°F] above dew point
• Relative humidity: <85% during application and curing

Application remarks:

• Use heavy-duty spray equipment, short hoses
• Metallized surfaces: overcoat before open air exposure
• Flash-coat technique recommended for porous substrates

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DRYING AND OVERCOATING

Product compatibility

• Previous coat: None or as per Hempel specification
• Subsequent coat: Hempadur, Hempaprime, Hempathane

Drying time (at 150 micron DFT)

Temp.	Touch dry	Surface dry	Hard dry	Fully cured
10°C [50°F]	2½ h	5½ h	8 h	—
20°C [68°F]	1 h	2½ h	3½ h	7 d
30°C [86°F]	40 min	1 h	1½ h	—
40°C [104°F]	20 min	30 min	45 min	—

Overcoating

Quality Name	10°C [50°F]	20°C [68°F]	30°C [86°F]	40°C [104°F]
Hempaprime Multi 500	Min: 7 h / Max: Ext*	3 h / Ext*	2 h / Ext*	90 min / Ext*
Hempathane HS 55610	Min: 7 h / Max: Ext*	3 h / Ext*	2 h / Ext*	90 min / Ext*

Ext* = Extended period, contact Hempel for guidance.
Overcoating times are indicative for products of same chemistry.

Drying conditions

• Ensure sufficient ventilation for proper drying and curing.

Overcoating details

• If max interval is exceeded, roughen surface.
• Surface must be dry and clean before recoating.

Other remarks

• Epoxy coatings chalk in outdoor exposure (no effect on performance).
• Hempel’s Specification overrides this PDS if conflicting.

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STORAGE

Shelf life

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

Store in original, unopened containers. Inspect quality beyond shelf life. Avoid high storage temperatures.

Storage conditions

• Max 40°C [104°F], out of direct sunlight, protected from rain/snow
• Follow local regulations for storage

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CARBON FOOTPRINT

Dry film thickness	1 µm	1 mil
GWP	5.5 g CO₂e/m²	0.028 lb CO₂e/ft²

Covers entire lifecycle: raw materials, transport, manufacturing, and VOC emissions. Based on standard shade.

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REFERENCES

Product Data Sheet – Hempaprime Multi 500
Issued by Hempel A/S – February 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.