Hempadur MultiStrength 35840

PRODUCT DATA SHEET

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PRODUCT CHARACTERISTICS

Recommended use

As a self-primed, high build coating for areas subject to a highly corrosive environment. Can be used on pilings, offshore structures, splash zone and other immersed areas.

Service temperature

• Maximum, dry exposure only: 140°C [284°F]

Certificates / Approvals

• Third-party verified, product-specific Environmental Product Declaration (Type III EPD, ISO 14025, EN 15804)
• Meets requirements to NORSOK M-501 when used as part of a predefined paint system. Edition 6, System 7A, 7B. Edition 7, System 7A.

Features

• Glass flake shade 1115G and 5063G are compliant with the requirements of ISO 24656, Annex D Cat. V.

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PRODUCT SAFETY

Flash point

87°C [189°F]

VOC content mixed product

Legislation	Value
EU	23 g/L [0.19 lb/US gal]
US (coatings)	23 g/L [0.19 lb/US gal]
US (regulatory)	23 g/L [0.19 lb/US gal]
China	23 g/L [0.19 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: 35840
Product components: Base 35849, Curing Agent 95620
Standard shade / code: Light grey 11150
Gloss: Glossy
Volume solids: 100%
Specific gravity: 1.3 kg/L [11 lb/US gal]
Reference dry film thickness: 500 micron [20 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)
• All damage of shopprimer and contamination from storage and fabrication should be thoroughly mechanically/chemically cleaned prior to final painting
• Remove dust, blast media and loose materials

Maintenance and Repair

• Spot abrasive blasting to min. PSa 2 (ISO 8501-2) / SP 6 (SSPC)
• Minor areas can be cleaned by power tool to St 3 provided the surface is roughened and not polished
• Water jetting to min. Wa 2 (ISO 8501-4)
• Flash rust degree of maximum FR M (ISO 8501-4)
• Remove dust, blast media and loose materials

Roughness

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

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APPLICATION

Mixing ratio

Base 35849 : Curing Agent 95620 (3 : 1 by volume)
Stir well before use. Thinning is not allowed.

Thinner

No thinning

Cleaner

Hempel’s Tool Cleaner 99610

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POT LIFE

Product temperature	Pot life
20°C [68°F]	60 min
25°C [77°F]	36 min
30°C [86°F]	30 min

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APPLICATION METHOD

Tool	Thinning max vol.	Application parameters
Airless spray	No thinning	Nozzle pressure: 220 bar [3200 psi], Nozzle orifice: 0.021-0.027″
Brush	No thinning	Not Applicable

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FILM THICKNESS

Specification range	Low	High	Recommended
Dry film thickness	250 micron [10 mils]	1000 micron [40 mils]	500 micron [20 mils]
Wet film thickness	250 micron [10 mils]	1001 micron [40 mils]	501 micron [20 mils]
Theoretical spreading rate	4 m²/L [163 sq ft/US gal]	1 m²/L [41 sq ft/US gal]	2 m²/L [81 sq ft/US gal]

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APPLICATION CONDITIONS

• Temperature of product must be above 20°C [68°F] during application
• Surface temperature must be above 10°C [50°F] during application and curing
• 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

Relative Humidity

• Must be below 80% during application

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DRYING AND OVERCOATING

Product compatibility

• Previous coat: None or according to Hempel’s specification. Recommended product is: Hempadur 15590
• Subsequent coat: None or according to Hempel’s specification

Drying time

Surface temperature	Hard dry	Through dry	Fully cured
20°C [68°F]	7 h	23 h	7 d

Overcoating

Quality name	20°C [68°F] Min	20°C [68°F] Max
Atmospheric severe (35840)	8 h	30 d
Hempathane HS 55610	8 h	5 d
Immersion (35840)	8 h	30 d

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

Overcoating details
– If the maximum overcoating interval is exceeded, roughening of the surface is necessary to ensure intercoat adhesion.
– The surface must be clean before overcoating.

Other remarks
– Epoxy coats have an inherent tendency of chalking in outdoor exposure. This does not affect the performance of the coating.
– Hempel’s Specification supersedes any recommendations given inthe Product Data Sheets.

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STORAGE

Shelf life

Ambient temperature	Base	Curing Agent
25°C [77°F]	36 months	12 months

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CARBON FOOTPRINT

Dry film thickness	1 µm	1 mil
GWP	7.6 g CO₂e/m²	0.04 lb CO₂e/ft²

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REFERENCES

Product Data Sheet – Hempadur Multi-Strength 35840
Issued by Hempel A/S – March 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.