Hempaline Prepare 120

Product characteristics

Product safety

Flash point
31°C [88°F]

VOC content mixed product

Legislation	Value
EU	21 g/L [0.18 lb/US gal]
US (coatings)	21 g/L [0.18 lb/US gal]
US (regulatory)	21 g/L [0.18 lb/US gal]
China	21 g/L [0.18 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: 17040
• Product components: Base 17049, Curing Agent 9580A
• Standard shade / code: Transparent 00000
• Gloss: Semi-gloss
• Volume solids: 99 ± 1%
• Specific gravity: 1 kg/L [9 lb/US gal]
• Reference dry film thickness: 100 micron [4.0 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.
• Concrete: According to Hempel’s Specification.

New build:

• Abrasive blasting to min. Sa 2½ (ISO 8501-1) / SP 10 (SSPC).
• 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 17049 : Curing Agent 9580A (49 : 1 by volume)
Stir well before use. Thinning is not allowed.

Thinner

• No thinning

Cleaner

• Hempel’s Thinner 08960

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Pot life

Product temperature	Pot life
20°C [68°F]	40 min
10°C [50°F]	60 min
30°C [86°F]	25 min

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Application method

Tool	Thinning max vol.	Application parameters
Roller	No thinning	Nozzle pressure: 200 bar [2900 psi]
Airless spray	No thinning	Nozzle orifice: 0.025–0.048″

As tank lining, brush and roller application must only be limited to stripe coating and touch up areas or minor repairs. 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	75 micron [3.0 mils]	76 micron [3.0 mils]	13 m²/L [530 sq ft/US gal]
High	200 micron [8.0 mils]	203 micron [8.1 mils]	4.9 m²/L [200 sq ft/US gal]
Recommended	100 micron [4.0 mils]	101 micron [4.1 mils]	10 m²/L [407 sq ft/US gal]

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. For best performance, avoid excessive film thickness.

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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.
• Surface temperature must be above 10°C [50°F] during application and curing.
• Optimal paint temperature for proper mixing, pumping and spraying is: 20–25°C [68–77°F].

Relative Humidity:

• Must be below 80% during application.

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Application remarks

• The product contains 100% reactive material, however some of the volatile reactants may evaporate. Furthermore, the curing process is accompanied by contraction. As a result, volume solids and spreading rate are in practice lower than stated above. For estimating coverage, a figure of 85% practical volume solids is suggested depending on application and curing conditions.

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Drying and overcoating

Product compatibility

• Previous coat: None
• Subsequent coat: Recommended products are: Hempaline Defend 500, Hempaline Defend 740

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Drying time

Surface temperature	Surface dry (h)	Through dry (h)	Fully cured (days)
10°C [50°F]	9	13	6
20°C [68°F]	6	8	3
30°C [86°F]	4	5	2
35°C [95°F]	3½	4	1½

Determined for dry film thickness 100 micron [4.0 mils] at standard conditions, see Hempel’s Explanatory Notes for details.

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Overcoating

Overcoating times (Immersion)

Quality name	10°C [50°F]	20°C [68°F]	30°C [86°F]
Hempaline Prepare 120	Min 16 h / Max 6 d	Min 8 h / Max 4 d	Min 6 h / Max 48 h
Hempaline Defend 740	Min 16 h / Max 6 d	Min 8 h / Max 4 d	Min 6 h / Max 48 h
Hempel’s Vinyl Ester GF	Min 16 h / Max 6 d	Min 8 h / Max 4 d	Min 6 h / Max 48 h

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

• 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.
• As tank lining, if the maximum overcoating interval is exceeded, roughening of the surface by sweep abrasive blasting is necessary to ensure intercoat adhesion.

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Other remarks

• Hempel’s Specification supersedes any recommendations given in the Product Data Sheets.

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Storage

Shelf life

Ambient temperature	Base	Curing Agent
25°C [77°F]	6 months	6 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	5 g CO₂e/m²
1 mil	0.026 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 – Hempaline Prepare 120
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 with the most current recommendations.