SIGMATHERM 540 Sigma protective and marine coatings

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20.00 KGS
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 SIGMATHERM 540 Sigma protective and marine coatings

SIGMATHERM 540 Sigma protective and marine coatings

GZ Industrial Supplies is a distributor of Sigma Marine coatings in Nigeria, our SIGMATHERM 540 Sigma protective and marine coatings is a One-component, heat-resistant, moisture-curing silicone aluminum, suitable for Infrastructure projects, chemical and petrochemical plants, offshore constructions.

product characteristics sigmatherm 540 Sigma protective and marine coatings

  • Dry heat resistance up to 600°C (1112°F)
  • No heat cure necessary between coats
  • To be used for the internal and external protection of steel surfaces
  • Excellent resistance against weathering
  • Also suitable on top of zinc silicate primer
  • A minimum drying time of 3 days at 20°C (68°F) should be allowed before exposure to heat
  • Complies with NACE SP0198 for austenitic stainless steels and carbon steels under thermal insulation


Substrate conditions

  • Steel; blast cleaned to ISO Sa 21⁄2 or SSPC-SP-10, blasting profile 25 – 50 μm (1.0 – 2.0 mils)
  • Suitable coating (zinc silicate primer) must be dry, free from any contamination and zinc salts
  • Stainless steel; degreased and sweep blast (SSPC SP-16) cleaned to roughness of 40 – 70 μm (1.5 – 2.8 mils) with non-

ferrous abrasive
Note: The maximum continuous dry heat temperature when power tool treated surface (ISO-St3) is 400°C

Substrate temperature and application conditions

• Substrate temperature during application should be at least 3°C (5°F) above dew point


  • Suitable Primers : PPG Ethyl Silicate Zinc Primers
  • Do not use HI-TEMP 1027 or 222G as primer
  • Direct to stainless steel with suitable surface treatment
  • Power agitate to uniform consistency
  • Application with airless equipment is possible, but be careful not to apply more than specified thickness
  • When applying more than one coat, it is recommended that the total dry film thickness of SIGMATHERM 540 does not

exceed 80 μm (3.1 mils)

Air spray

Recommended thinner

No thinner should be added

Nozzle orifice

1.5 – 2.0 mm (approx. 0.060 – 0.079 in)

Nozzle pressure

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


• For Roller application the best results will be obtained by using fine foam type rollers

Cleaning solvent



Product Technical Datasheet Downloadpdf-log.png

Contact Our Coatings Team for a free quote





1 Review Hide Reviews Show Reviews

  • 5
    highly effective

    Posted by Fredrich Bassey on Sep 25, 2019

    Excellent quality