PRODUCT DATASHEET

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COLOR AND GLOSS LEVEL

• Gray, off-white (other colors available on request)
• Aluminum colors (dark gray, light gray)
• Eggshell

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BASIC DATA AT 20°C (68°F)

(Mixed Product)

Property	Value
Number of components	Two
Mass density	1.5 kg/l (12.5 lb/US gal)
Volume solids	80 ± 2%
VOC (supplied)	Directive 1999/13/EC, SED: max. 150.0 g/kg UK PG 6/23(92) Appendix 3: max. 225.0 g/l (≈1.9 lb/gal)
Recommended DFT	75 – 250 µm (3.0 – 10.0 mils) depending on system
Theoretical spreading rate	6.4 m²/l @ 125 µm (257 ft²/gal @ 5 mils)
Dry to touch	3 hours
Overcoating interval	Min: 8 hours Max: 6 months
Full cure	7 days
Shelf life	Base: 24 months (cool, dry) Hardener: 24 months (cool, dry)

Notes:
See ADDITIONAL DATA – Spreading rate & film thickness, overcoating intervals, curing time.

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RECOMMENDED SUBSTRATE CONDITIONS AND TEMPERATURES

Atmospheric Exposure

• Steel: Blast cleaned to ISO-Sa2½ for excellent corrosion protection
• Steel: Blast cleaned to ISO-Sa2 or power tool cleaned to ISO-St2 for good corrosion protection
• Shop-primed steel: Pre-treated to SPSS-Pt2
• Galvanized steel: Sweep blasted to roughen surface & remove zinc salts
• Stainless steel: Degreased & sweep blasted (SSPC SP-16) to roughness 40–70 µm (1.5–2.8 mils) using non-ferrous abrasive

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Immersion Exposure

• Steel: Blast cleaned to ISO-Sa2½
• Steel with approved zinc silicate primer: Sweep blasted to SPSS-Ss or power tool cleaned to SPSS-Pt3

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Substrate Temperature

• Must be above 5°C (41°F)
• Must be minimum 3°C (5°F) above dew point during application & curing

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INSTRUCTIONS FOR USE

Mixing Ratio (By Volume)

Base : Hardener = 80 : 20 (4:1)

• Preferably keep mixed components above 15°C (59°F)
• Extra thinner may be required at lower temperatures
• Too much thinner reduces sag resistance & slows cure
• Add thinner after mixing components

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Induction Time

Mixed Product Temperature	Induction Time
Above 10°C (50°F)	None

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Pot Life

4 hours at 20°C (68°F).
(See Additional Data – Pot Life)

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AIRLESS SPRAY APPLICATION

Parameter	Specification
Recommended thinner	THINNER 91-92
Volume of thinner	0–10% (depending on thickness & conditions)
Nozzle orifice	0.46–0.53 mm (0.018–0.021 in)
Nozzle pressure	20–25 MPa (200–250 bar / 2901–3626 psi)

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BRUSH / ROLLER APPLICATION

• Roller will leave marking; suitable only for minimum DFT
• Roller must be suitable for epoxy application

Item	Value
Recommended thinner	THINNER 91-92
Volume of thinner	0–5%
Cleaning solvent	THINNER 90-53

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ADDITIONAL DATA

Spreading Rate & Film Thickness

DFT	Theoretical Spreading Rate
75 µm (3.0 mils)	10.7 m²/l (428 ft²/gal)
100 µm (4.0 mils)	8.0 m²/l (321 ft²/gal)
125 µm (5.0 mils)	6.4 m²/l (257 ft²/gal)
150 µm (6.0 mils)	5.3 m²/l (214 ft²/gal)
200 µm (8.0 mils)	4.0 m²/l (160 ft²/gal)

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OVERCOATING INTERVALS (Atmospheric Exposure)

For DFT up to 125 µm (5 mils)

Temperature	Minimum	Maximum (sun)	Maximum (no sun)
5°C (41°F)	48 hrs	3 months	6 months
10°C (50°F)	24 hrs	3 months	6 months
20°C (68°F)	8 hrs	3 months	6 months
30°C (86°F)	4 hrs	3 months	6 months
40°C (104°F)	2 hrs	3 months	6 months

Surface must be dry, clean, and roughened after long exposure.

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OVERCOATING INTERVALS (Immersion Exposure)

Temperature	Minimum	Maximum
5°C (41°F)	48 hrs	2 months
10°C (50°F)	24 hrs	2 months
20°C (68°F)	8 hrs	2 months
30°C (86°F)	4 hrs	2 months
40°C (104°F)	2 hrs	2 months

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CURING TIME

For DFT up to 125 µm (5 mils)

Temperature	Dry to Touch	Dry to Handle	Full Cure
5°C (41°F)	24 hrs	48 hrs	20 days
10°C (50°F)	12 hrs	24 hrs	14 days
20°C (68°F)	3 hrs	8 hrs	7 days
30°C (86°F)	2 hrs	6 hrs	4 days
40°C (104°F)	1 hr	3 hrs	3 days

Adequate ventilation must be maintained (refer to Information Sheets 1433 & 1434).

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POT LIFE (Application Viscosity)

Temperature	Pot Life
10°C (50°F)	10 hours
15°C (59°F)	6 hours
20°C (68°F)	4 hours
30°C (86°F)	2 hours
40°C (104°F)	1 hour

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SAFETY PRECAUTIONS

• Refer to Information Sheets 1430, 1431 and MSDS
• Solvent-borne paint: avoid inhaling spray mist or vapors
• Avoid contact with skin and eyes

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WORLDWIDE AVAILABILITY

Product may be modified to comply with local regulations.
Alternative product data sheets may apply.

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REFERENCES

Product Data Sheet – SIGMACOVER™ 620
Issued by PPG Protective & Marine Coatings
Document Reference: 6825
Publication Date: January 15, 2021
Source: https://www.ppgpmc.com

Technical Guidelines & Safety Information
Last accessed: 28 May 2025