SIGMASHIELD 905
4 pages October 2009
Revision of July 2007
DESCRIPTION two component glassflake reinforced solvent free amine cured epoxy coating
PRINCIPAL CHARACTERISTICS – one coat protection for cargo holds with excellent corrosion resistance
– excellent abrasion and impact resistance, especially to hard angular cargoes
– good resistance to various chemicals
– good visibility due to light colour
– reduced explosion risk and fire hazard
– can be applied by heavy duty single feed airless spray equipment (60:1)
COLOURS AND GLOSS green - gloss
BASIC DATA AT 20°C (1 g/cm³ = 8.25 lb/US gal; 1 m²/l = 40.7 ft²/US gal)
(data for mixed product)
Mass density 1.3 g/cm³
Volume solids 100%
VOC (supplied) max. 107 g/kg (Directive 1999/13/EC, SED)
max. 141 g/l (approx. 1.2 lb/gal)
see information sheet 1411
Recommended dry film thickness 400 - 500 µm
Theoretical spreading rate 2.5 m²/l for 400 µm *
Touch dry after 8 hours
Overcoating interval min. 24 hours *
max. 20 days *
Full cure after 5 days *
(data for components)
Shelf life (cool and dry place) at least 12 months
* see additional data
RECOMMENDED – for cargo holds:
SUBSTRATE CONDITIONS • steel; blast cleaned to ISO-Sa2½, blasting profile 50 - 100 µm
AND TEMPERATURES – for immersed areas:
• steel; blast cleaned to ISO-Sa2½, blasting profile 50 - 100 µm, followed
by SigmaShield 220 (dft of 100 µm) or SigmaCover 280 (dft of 50 µm),
dry and free from any contamination
– substrate temperature must be above 10°C and at least 3°C above dew
point during application and curing
SYSTEM SPECIFICATION cargo holds system sheet: 3107
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SIGMASHIELD 905
October 2009
INSTRUCTIONS FOR USE mixing ratio by volume: base to hardener 80 : 20
– when mixing the temperature of the base and hardener should be at least
20°C
– at lower temperature the viscosity will be too high for spray application
– no thinner should be added
Induction time none
Pot life 1 hour at 20°C *
* see additional data
AIRLESS SPRAY – heavy duty single feed airless spray equipment preferably 60:1 pump ratio
and suitable high pressure hoses
– in-line heating or insulated hoses may be necessary to avoid cooling down
of paint in hoses at low air temperature
– application with 45:1 airless spray equipment is possible provided in-line
heated high pressure hoses are used
– in case of using 45:1 airless spray equipment the paint must be heated to
approx. 30°C in order to obtain the right application viscosity
– length of hoses should be as short as possible
Recommended thinner no thinner should be added
Nozzle orifice approx. 0.53 mm (= 0.021 in)
Nozzle pressure at 20°C (paint temperature) min. 28 MPa (= approx. 280 bar; 4000 p.s.i.)
at 30°C (paint temperature) min. 22 MPa (= approx. 220 bar; 3000 p.s.i.)
BRUSH/ROLLER for stripe coating and spot repair only
Recommended thinner no thinner should be added
CLEANING SOLVENT Thinner 90-83 (preferred) or Thinner 90-53
– all application equipment must be cleaned immediately after use
– paint inside the spraying equipment must be removed before the pot life time
has been expired
SAFETY PRECAUTIONS for paint and recommended thinners see safety sheets 1430, 1431 and relevant
material safety data sheets
although this is a solvent free paint, care should be taken to avoid inhalation of
spray mist as well as contact between the wet paint and exposed skin or eyes
– ventilation should be provided in confined spaces to maintain good visibility
ADDITIONAL DATA Film thickness and spreading rate
theoretical spreading rate m²/l 2.5 2.0
dft in µm 400 500
max. dft when brushing: 150 - 200 µm
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SIGMASHIELD 905
October 2009
measuring wet film thickness
– a deviation is often obtained between the measured apparent wft and the
real applied wft
– this is due to the thixotropy and the surface tension of the paint which
retards the release of air trapped in the paint film for some time
– recommendation is to apply a wft which is equal to the specified dft plus 60
µm
maximum dry film thickness
– because of low initial hardness the dft cannot be measured for some days
(depending on ambient temperature) after application due to the penetration
of the measuring device into the paint film
– the dft should be measured using a calibration foil of known thickness placed
in between the coating and the measuring device
Overcoating table for SigmaShield 905 for dft up to 500 µm
substrate 10°C 20°C 30°C 40°C
temperature
minimum 36 hours 24 hours 16 hours 12 hours
interval
maximum 20 days 20 days 14 days 7 days
interval
– surface should be dry and free from any contamination
Curing table
substrate temperature dry to handle full cure
5°C 60 hours 15 days
10°C 30 hours 7 days
20°C 16 hours 5 days
30°C 10 hours 3 days
40°C 8 hours 2 days
– adequate ventilation must be maintained during application and curing
(please refer to sheets 1433 and 1434)
Pot life (at application viscosity)
20°C 60 min.
30°C 45 min.
40°C 25 min.
– due to exothermic reaction, temperature during and after mixing may
increase
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SIGMASHIELD 905
October 2009
Worldwide availability Whilst it is always the aim of PPG Protective & Marine Coatings to supply
the same product on a worldwide basis, slight modification of the product is
sometimes necessary to comply with local or national rules/circumstances.
Under these circumstances an alternative product data sheet is used.
REFERENCES Explanation to product data sheets see information sheet 1411
Safety indications see information sheet 1430
Safety in confined spaces and health safety
Explosion hazard - toxic hazard see information sheet 1431
Safe working in confined spaces see information sheet 1433
Directives for ventilation practice see information sheet 1434
Cleaning of steel and removal of rust see information sheet 1490
LIMITATION OF LIABILITY
The information in this data sheet is based upon laboratory tests we believe to be accurate and is intended for
guidance only. All recommendations or suggestions relating to the use of the Sigma Coatings products made by PPG
Protective & Marine Coatings, whether in technical documentation, or in response to a specific enquiry, or otherwise,
are based on data which to the best of our knowledge are reliable. The products and information are designed for
users having the requisite knowledge and industrial skills and it is the end-user's responsibility to determine the
suitability of the product for its intended use.
PPG Protective & Marine Coatings has no control over either the quality or condition of the substrate, or the many
factors affecting the use and application of the product. PPG Protective & Marine Coatings does therefore not accept
any liability arising from loss, injury or damage resulting from such use or the contents of this data sheet (unless there
are written agreements stating otherwise).
The data contained herein are liable to modification as a result of practical experience and continuous product
development.
This data sheet replaces and annuls all previous issues and it is therefore the user's responsibility to ensure that this
sheet is current prior to using the product.
The English text of this document shall prevail over any translation thereof.
PDS 7954
190476 green 4000002200
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