Hempaline Defend 630 LT

PRODUCT DATASHEET

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PRODUCT CHARACTERISTICS

Recommended use

Intended to provide high levels of corrosion resistance in tanks, process vessels, pipes and other equipment used in the Oil & Gas industries. Elevated temperature and pressure resistance makes Hempaline Defend 630 LT suitable for a variety of application from static storage tanks to pressure vessels operating up to 120°C.

Service temperature

• Maximum, dry exposure only: 150°C [302°F].
• Please contact Hempel for more information.
• Please consult the Chemical protection guide at hempel.com

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PRODUCT SAFETY

Flash point

84°C [183°F]

VOC content mixed product

Legislation	Value
EU	33 g/L [0.28 lb/US gal]
US (coatings)	33 g/L [0.28 lb/US gal]
US (regulatory)	33 g/L [0.28 lb/US gal]
China	33 g/L [0.28 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: 37822
Product components: Base 37826, Curing Agent 9782W
Standard shade / code: White 10000
Volume solids: 100%
Specific gravity: 1.4 kg/L [12 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.
• 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.

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 37826 : Curing Agent 9782W (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]	20 min

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APPLICATION METHOD

Tool	Thinning max vol.	Application parameters
Dual feed spray	No thinning	Nozzle pressure: 200 bar [2900 psi], Nozzle orifice: 0.021-0.029″
Brush/Roller	No thinning	Not Applicable

If brush or roller application is used, more coats will be necessary to achieve the specified dry film thickness. 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	Low	High	Recommended
Dry film thickness	400 micron [16 mils]	750 micron [30 mils]	500 micron [20 mils]
Wet film thickness	400 micron [16 mils]	750 micron [30 mils]	500 micron [20 mils]
Theoretical spreading rate	2.5 m²/L [102 sq ft/US gal]	1.3 m²/L [53 sq ft/US gal]	2 m²/L [81 sq ft/US gal]

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APPLICATION CONDITIONS

• Optimal paint temperature for proper mixing, pumping and spraying is: 20-25°C [68-77°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 -5°C [23°F] during application and curing.

Relative Humidity

• Relative humidity must be below 80% during curing

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DRYING AND OVERCOATING

Product compatibility

• Previous coat: None or according to Hempel’s specification. Recommended products are: Hempaline Prepare 130, Hempaline Prepare 110
• Subsequent coat: None or according to Hempel’s specification. Recommended product is: Hempaline Defend 630 LT

Drying time

Surface temperature	Hard dry	Dry to walk on	Fully cured
-5°C [23°F]	26 h	80 h	7 d
0°C [32°F]	18 h	68 h	6 d
5°C [41°F]	16 h	42 h	4½ d
10°C [50°F]	14 h	24 h	3 d

Overcoating

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

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

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OVERCOATING DETAILS

• 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
• 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]	12 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.

Storage conditions

• Product must be stored according to local legislation, at maximum 40°C [104°F], without direct sunlight and protected from rain and snow.
• Temperature must not go below 5°C [41°F] during transport and storage

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CARBON FOOTPRINT

Dry film thickness	1 µm	1 mil
GWP	7.7 g CO₂e/m²	0.04 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 Defend 630 LT
Issued by Hempel A/S – November 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.