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PPG SigmaTherm 540

7564
PPG3939

PPG SigmaTherm 540 is a one-component, heat-resistant, moisture-curing silicone aluminum coating for protecting steel surfaces in internal and external applications. Complies with NACE SP0198 for austenitic stainless steels and carbon steels under thermal insulation.

  • Dry heat resistance up to 600°C (1112°F)
  • No heat cure necessary between coats
  • Excellent resistance against weathering
Colour
Size
Finish
£164.89(incl. VAT)
£137.41(ex. VAT)
Quantity
Please choose your colour
Available for Delivery (See Delivery Options Below)

Description

PPG SigmaTherm 540 is a one-component, heat-resistant, moisture-curing silicone aluminum coating for protecting steel surfaces in internal and external applications. Complies with NACE SP0198 for austenitic stainless steels and carbon steels under thermal insulation.

Principal Characteristics

  • Dry heat resistance up to 600°C (1112°F)
  • No heat cure necessary between coats
  • 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

Product Data


Two-component, high-build, heat-resistant epoxy phenol novolac coating.

Epoxy coatings will chalk and fade upon exposure to sunlight, elevated temperatures, or chemical exposure. Discolouration and normal chalking does not impact performance. Light colours will darken over time. Some batch-to-batch variation in colour is to be expected. Colour matches are approximate.

Data for mixed product at 20°C (68°F)
Number of components One
Mass density 1.1 kg/l (9.2 lb/US gal)
Volume solids 45 ± 2%
VOC (Supplied) Directive 1999/13/EC, SED: max. 412.0 g/kg
UK PG 6/23(92) Appendix 3: max. 498.0 g/l (approx. 4.2 lb/US gal)
Temperature resistance (Continuous) To 600°C (1110°F)
Recommended dry film thickness 25 µm (1.0 mils)
Theoretical spreading rate 18.0 m²/l for 25 µm (722 ft²/US gal for 1.0 mils)
Dry to touch 45 minutes
Overcoating Interval Minimum: 16 hours
Shelf life At least 9 months when stored cool and dry

Notes:

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

Surface Preparation


Recommended Substrate Conditions and Temperatures

  • Steel; blast cleaned to ISO Sa 2½ 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 nonferrous abrasive

Note:

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

 

Substrate Temperature & Application Conditions


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

System Specification


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.

Application


Instructions for Use

  • 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.)

 

Brush/roller


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

 

Cleaning Solvent




Spreading Rate and Film Thickness


Overcoating interval for DFT up to 25 µm (1.0 mils)


Overcoating with... Interval 10°C (50°F) 20°C (68°F) 30°C (86°F) 40°C (104°F)
Itself Minimum 24 hours 16 hours 12 hours 6 hours
Maximum Unlimited Unlimited Unlimited Unlimited

Notes:

  • Surface should be dry and free from any contamination

 

Curing time for DFT up to 25 µm (1.0 mils)


Substrate temperature Dry to Touch Dry to Handle
10°C (50°F) 1 hour 5 hours
20°C (68°F) 45 minutes 3.5 hours
30°C (86°F) 30 minutes 2 hours
40°C (104°F) 15 minutes 1 hour

Notes:



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


Product Details
3939-514924

Data sheet

Manufacturer
PPG
Water / Solvent Based
Solvent
For Use On
Carbon steel, stainless steel
Application Method
Spray, brush, roller
Sheen
Eggshell
Colour
Standard / Ready Mixed
Single, Two or Three Pack
Single
Product Certifications
NACE SP0198
Pack Size
5L, 20L
Base Type
Silicone aluminum
Mixing Ratio
-
Key Features
Dry heat resistance up to 600°C (1112°F), no heat cure necessary between coats, also suitable on top of zinc silicate primer
Touch Dry (at 20°C)
45 minutes
Dry to Handle (at 20°C)
-
Dry to Recoat (at 20°C)
Min. 16 hours
Fully Cured (at 20°C)
-
Pot Life (at 20°C)
-
Coverage
18.0 m²/I for 25 µm (722 ft²/US gal for 1.0 mils)
Recommended Thinner/Cleaner
For cleaning only: PPG Thinner 21-06
Unit Contents
-
Compatible Primers
-
Compatible Topcoats
Itself
Max. Application Temperature
-
Min. Application Temperature
At least 3°C (5°F) above dew point
Density
1.1 kg/I (9.2 lb/US gal)
Solids by Volume
45 ±2%
Heat Resistance (up-to)
600°C
VOC
Directive 1999/13/EC, SED: max. 412.0 g/kg. UK PG 6/23(92) Appendix 3: max. 498 .0 g/1 (approx. 4.2 lb/US gal)
Shelf Life (Once Opened)
At least 9 months when stored cool and dry
UN Number
UN1263
Base Type
Solvent-Based
Suitable For Use On
Carbon Steel
Suitable For Use On
Stainless Steel
Finish
Eggshell
Application Method
Roller
Application Method
Brush
Application Method
Spray
Product Usage Type
Topcoat
Product Range
SigmaTherm
Colour Family
Aluminium
Heat Resistance
Up To 600°C
Attachments
Download


Customer agrees that before placing an Order, Customer has read and understood the most up to date Product Data Sheet for the Product. Where we have access to the Product Data Sheet from the manufacturer, we will either provide a copy on request, or include a link to the Product Data Sheet available on the manufacturer’s website. Customer further agrees that we have no liability for any errors or omissions contained within the Product Data Sheets. For more information, please see our Terms & Conditions of Sale.


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IMPORTANT SHIPPING & DELIVERY INFORMATION

PPG SigmaTherm 540 is only available with the shipping and delivery timescales listed below - please do not contact our Customer Support Team with enquiries about alternative or earlier shipping and delivery times.

Saturdays and Sundays, as well as Bank Holidays, are not classed as working days.

Orders placed after the cut-off for this product will not be processed for earliest dispatch until 9am the next working day.

All delivery costs below are excluding VAT


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