SigmaCover 350 LT, a two-component, high-build polyamide cured anticorrosive epoxy primer/coating that cures at temperatures down to -5°C (23°F), for wide use in Marine and Protective Coatings such as topsides, decks, superstructures and cargo holds. The fast-curing primer has good impact and abrasion resistance and excellent corrosion resistance, applying by spray, brush or roller.

Available in 2,600+ colours, inc. RAL, BS, NCS & the new NCS 2050 colours.

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Features & Benefits

• Surface tolerant primer/coating for wide use in Marine and Protective Coatings
• Marine use: suitable on topsides, decks, superstructures and cargo holds
• Cures at temperatures down to -5°C (23°F)
• Available in 2,600+ colours, inc. RAL, BS, NCS & the new NCS 2050 colours
• Good impact and abrasion resistance
• Fast-curing
• Smooth film, easy to clean
• Compatible with various aged coatings
• Excellent corrosion resistance
• Resistant to splash and spillage of a wide range of chemicals
• No induction time
• 3 hours pot life (at 10°C (50°F))
• Touch dry in 4 hours, overcoat after 8 hours
• Fully cured after 7 days
• Can be applied by air spray, brush or roller
• See below for more information on surface preparation, application details and curing times

For Cargo holds use gray (5177) and redbrown (6179) only.

The aluminium shade can be used as a replacement for SigmaCover 690 LT, which has been discontinued.

Product Data

Two-component, high-build polyamide cured anticorrosive epoxy primer/coating.

Notes:

• Refer below for more details on spreading rate and film thickness, overcoating intervals and curing times

Surface Preparation

Recommended Substrate Conditions and Temperatures

Substrate conditions

• Steel; blast cleaned to ISO-Sa2½ for excellent corrosion protection, blasting profile 40 – 70 µm (1.6 – 2.8 mils)
• Steel; blast cleaned to ISO-Sa2, blasting profile 40 – 70 µm (1.6 – 2.8 mils) or power tool cleaned to minimum ISO-St2 for good corrosion protection
• Previous coat must be dry and free from any contamination
• Previous coat: surface should be sufficiently roughened if necessary
• At freezing temperatures surface must be free from ice

Substrate Temperature & Application Conditions

• Substrate temperature during application and curing should be between -5°C (23°F) and 15°C (59°F)
• Substrate temperature during application and curing should be at least 3°C (5°F) above dew point

System Specification

• SIGMACOVER 350 LT: 2 x 125 µm (5.0 mils) DFT

Application

Instructions for Use

Mixing ratio by volume: base to hardener 80:20 (4:1)

• The temperature of the mixed base and hardener should preferably be above 15°C (59°F), otherwise extra thinner may be required to obtain application viscosity
• Adding too much thinner results in reduced sag resistance and slower cure
• Thinner should be added after mixing the components

Induction Time

None.

Pot life

• 3 hours at 10°C (50°F)

Refer below for more information

Air Spray

Recommended thinner

• THINNER 91-92

Volume of thinner

• 5 - 10%, depending on required thickness and application conditions

Nozzle orifice

• 1.8 – 2.0 mm (approx. 0.070 – 0.079 in)

Nozzle pressure

0.3 - 0.4 MPa (approx. 3 - 4 bar; 44 - 58 p.s.i.)

Airless spray

Recommended thinner

• THINNER 91-92

Volume of thinner

• 0 - 10%, depending on required thickness and application conditions

Nozzle orifice

• Approx. 0.48 – 0.53 mm (0.019 – 0.021 in)

Nozzle pressure

• 15.0 MPa (approx. 150 bar; 2176 p.s.i.)

Brush/roller

Recommended thinner

• THINNER 91-92

Volume of thinner

• 0 – 5%

Cleaning Solvent

• THINNER 91-92

Spreading Rate and Film Thickness

Note:

• Maximum DFT when brushing: 100 µm (4.0 mils)

Overcoating interval for DFT up to 150 µm (6.0 mils)

For application in Marine areas subject to non-permanent exposure to splash water, seawater, spillage to chemicals etc.

Note:

• Surface should be dry and free from any contamination and ice

Curing time for DFT up to 150 µm (6.0 mils)

Notes:

• For cargo hold application: for full cure for hard angular cargoes, please contact our technical team
• Adequate ventilation must be maintained during application and curing (please refer to information sheets 1433 and (1434)
• Should SIGMACOVER 350 LT or the total coating system (2 x 125 µm/2 x 5.0 mils) be applied in excess of the specified dry film thickness, then the time necessary to reach full cure will be increased

Pot Life (at application viscosity)

Safety Precautions

• For paint and recommended thinners, see information sheets information sheet 1430, information sheet 1431 and the relevant Material Safety Data Sheets in the attachments section above
• This is a solvent-borne paint and care should be taken to avoid inhalation of spray mist or vapor, as well as contact between the wet paint and exposed skin or eyes

References

• Explanation to product data sheets (information sheet 1411)
• Safety Indicators (information sheet 1430)
• Safety in Confined Space and Health Safety, Explosion Hazard - Toxic Hazard (information sheet 1431)
• Safe Working in Confined Spaces (information sheet 1433)
• Directives for Ventilation Practice (information sheet 1434)