Sherwin-Williams Magnalux 42SF is a 2-pack glass flake styrene free bisphenol polyester coating for steel surfaces prepared by abrasive blast cleaning in marine environments. It is recommended for applications where styrene is not desirable or prohibited. Part of the Magnalux rage of coatings.
Approved to Norsok Rev 6 System 7A/7B
Immersed applications include:
Marine including splash zones, hydrocarbon, aqueous, corrosive chemical environments (Maximum immersion temp 60°C)
Sherwin-Williams Magnalux 42SF is a 2-pack glass flake styrene free bisphenol polyester for steel surfaces prepared by abrasive blast cleaning. It is recommended for applications where styrene is not desirable or prohibited.
The product is approved to Norsok Rev 6 System 7A/7B. Magnalux 42SF can be used under immersion or in non-immersed applications.
Magnalux products must not be applied over any existing painted surface, or any substrate which contains copper or zinc compounds. This includes copper or zinc based paints, or metal sprayed surfaces.
Please note: This product is subject to a 14 day lead time upon ordering
Magnalux products must not be applied over any existing painted surface, or any substrate which contains copper or zinc compounds. This includes copper or zinc based paints, or metal sprayed surfaces
Theoretical 98% at time of mixing. Practical typically 90% ± 5%*
VOC
<50 gms/litre determined practically in accordance with UK Regulations PG6/23
*All vinyl / polyester resin systems are subject to monomer loss and material shrinkage during application and curing.
Mixing Ratio:
98:2 base to hardener
Retarder (included) must be added when application temperature exceeds 15°C
Shelf Life:
Base: 12 months
Catalyst (Hardener): 6 months, stored at temperatures below 20°C, away from heat sources and out of direct sunlight
Frequent temperature cycling will shorten storage life
Recommended Thickness
For atmospheric service: 500-750 Microns
For aqueous and marine immersion: 850-1250 microns
For chemical service: 1250-2000 microns
Consult Sherwin-Williams technical support or Rawlins Paints' Technical Support Team on 0113 2455450 (option 2) or send a message to [email protected] for detailed specifications.
Practical Application Rates
Airless Spray
Dry
500* Microns Per Coat (Mils)
Wet
555 Microns Per Coat (Mils)
* Maximum sag tolerance typically 1110μm wet (1000μm dry) by airless spray
Average Drying Times
Touch Dry - 6 hours @ 20°C
Service time / Full cure - 3 to 4 days @ 20°C
These figures are given as a guide only. Factors such as air movement and humidity must also be considered.
Application Equipment
Airless Spray: Graco King 45:1 or similar - all filters removed - Min 3/8” hose diameter.
Airless Spray:
Nozzle Size
0.7 - 1.2mm (28-48 thou)
Fan Angle
45° - 60°
Operating Pressure
190-220kg/cm² (2700-3150 psi)
Notes:
The airless spray details given above are intended as a guide only
Details such as fluid hose length and diameter, paint temperature and job shape and size all have an effect on the spray tip and operating pressure chosen
However, the operating pressure should be the lowest possible consistent with satisfactory atomisation
As conditions will vary from job to job, it is the applicators' responsibility to ensure that the equipment in use has been set up to give the best results
Blast clean to Sa2½ ISO 8501-1:2007, surface profile in the range 75-125 microns
Ensure surfaces to be coated are clean, dry and free from all surface contamination
Application Conditions & Overcoating
In conditions of high relative humidity, ie 80-85% good ventilation conditions are essential
Substrate temperature shall be at least 3°C above the dew point and always above 0°C
At application temperatures below 10°C, drying and curing times will be significantly extended, and spraying characteristics may be impaired
If application and curing temperatures fall below 5°C, full cure may not be obtained - post curing may be required for certain aggressive environments - see additional notes
It is not advisable to apply polyester coatings when the air or substrate temperature exceeds 45°C, or the substrate temperature exceeds 55°C
These conditions can introduce paint film formation defects such as dry spray, pinholing, bubbling etc
For application outside these temperature limits it is recommended that advice is sought from Sherwin-Williams
Overcoating:
It is important to observe maximum overcoating times and note these will vary substantially with climatic conditions
Minimum, as soon as gel has occurred and whilst still tacky
Maximum at 20°C is 72 hours
Strong ultra-violet/sunlight will substantially reduce overcoating time
Once maximum overcoating time has been reached, adhesion values attained by any subsequent coat will reduce dramatically
Should this occur overcoating should be treated as a repair, with the coating flash blasted to provide a physical key
Styrene cannot be used to reactivate the surface of this product and may impair adhesion
Take care to avoid contamination before application of subsequent coats
Ensure ventilation during cure
Additional Notes
Drying times, curing times and pot life should be considered as a guide only
For optimum immersion service normal full cure must be achieved, ie 72 hours at 20°C (post curing at 80-100°C will shorten the cure time to 3 hours and may be recommended for some aggressive environments)
For immersion spark test at 5kv per 1.0mm dft and repair defects by overcoating with the specified dft of Magnalux 42SF
The reaction between the base component and catalyst is highly exothermic
Deviation from the recommended mixing ratio should not be undertaken without first consulting Sherwin-Williams
The catalyst must be stored separately from the base, and from any other paint or chemical products, in accordance with the product safety data sheet
The quoted pot lives are typical figures for a full 20 litre unit @ 2% catalyst level
Should any thickening or lumps appear in the mixed product, this should be discarded and the equipment flushed through and cleaned immediately
Reduction in catalyst level and/or volume of mixed product will extend the pot life
Flushing of spray equipment is essential before any break in work, and is recommended at regular intervals throughout the application procedure
Only mix units of Magnalux 42SF as they are required for immediate use
Magnalux products should not be thinned with cleanser thinners or any other solvent
Thinning will severely impair the curing mechanism and subsequent performance
Thinning with normal paint solvent can lead to exothermic reaction and possible fire or explosion hazard
Magnalux products must not be applied over any existing painted surface, or any substrate which contains copper or zinc compounds
This includes copper or zinc based paints, or metal sprayed surfaces
Numerical values quoted for physical data may vary slightly from batch to batch
Health & Safety
Consult the Safety Data Sheet for information on safe storage, handling and application of this product.
Please contact Rawlins Paints' Technical Support Team on 0113 2455450 (option 2) or send a message to [email protected] for more information.
Product Details
5010-803706
Data sheet
Manufacturer
Sherwin-Williams
For Use By
Industrial Use
Interior / Exterior Use
Exterior Use
For Use On
Steel
Application Method
Airless Spray
Sheen
Semi-Gloss
Colour
Standard / Ready Mixed
VOC Levels
Low (50-149 g/l)
Single, Two or Three Pack
Two-Pack
Product Certifications
Norsok Rev 6 System 7A/7B
Pack Size
20L
Minimum Applied Thickness
500 Microns
Maximum Applied Thickness
2000 Microns
Mixing Ratio
98:2 base to hardener
Touch Dry (at 20°C)
6 Hours
Fully Cured (at 20°C)
3-4 Days
Pot Life (at 20°C)
50 minutes
Coverage
1.20m²/litre at 750 microns
Recommended Thinner/Cleaner
No.13
Max. Application Temperature
45°C
Min. Application Temperature
3°C
Solids by Volume
Theoretical 98% at time of mixing. Practical typically 90% ± 5%
Shelf Life (from date of manufacture)
Base: 12 months, Catalyst (Hardener): 6 months, stored at temperatures below 20°C, away from heat sources and out of direct sunlight
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.
Sherwin-Williams Magnalux 42SF 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.
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