SIGMAWELD 160
5 pages April 2012
Revision of November 2011
Description two component moisture curing zinc (ethyl) silicate prefabrication primer
PRINCIPAL CHARACTERISTICS – suitable for automatic application on shot blasted steel plates
– fast drying properties
– good cutting and excellent welding properties, including MIG/MAG welding in
various positions (either automatic or manual welding)
– can be used as a first coat in various paint systems
– suitable for sea water immersion in combination with controlled cathodic
protection systems
– excellent thermal stability minimizes heat damage during hot work
procedures
– no adherence of weldspatter at surrounding primed surface
– approved by Lloyd's Register of Shipping, American Bureau fo Shipping and
China Classification Society for use as prefabrication primer
– fumes analysed by Schweisstechnische Lehr- und Versuchsanstalt and
comply with BRD 2009
COLOURS AND GLOSS grey, reddish grey, grey green – flat
BASIC DATA AT 20 °C (1 g/cm³ = 8.35 lb/US gal; 1 m²/l = 40.7 ft²/US gal)
(data for mixed product)
Mass density 1.3 g/cm³
Volume solids 30% ± 2%
VOC (Directive 1999/13/EC, SED) max. 428 g/kg (Directive 1999/13/EC, SED)
VOC (UK PG 6/23(92) appendix 3) max. 645 g/l (approx. 5.4 lb/gal)
(UK PG 6/23(92) Appendix 3)
Recommended dry film thickness 15 - 20 μm
see further "recommended substrate condtions and temperatures"
Theoretical spreading rate 20 m²/l for 15 μm
Touch dry after 4 min. at substrate temperature of 25°C
3 minutes at substrate temperature of 40°C
Overcoating interval min. 3 days
max. 6 months
longer overcoating intervals can be permitted when primer is still in sound
condition
Shelf life (cool and dry place) binder: at least 6 months
paste: at least 12 months
* see additional data
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SIGMAWELD 160
April 2012
RECOMMENDED – steel; shot blast cleaned to ISO-Sa2½, blasting profile 30 - 75 μm
SUBSTRATE CONDITIONS – on steel blasted to above profile, the recommended dft, 15 μm, corresponds
AND TEMPERATURES to 17 μm as measured on a smooth test panel
– minimum thickness for a closed film is 15 μm measured on a smooth test
panel
– substrate temperature may be up to max. 35°C
– for automatic application a substrate temperature of 30°C is recommended
– substrate temperature must be at least 3°C above dew point
– relative humidity during curing should be above 50% and below 85%
– dust quantity rating "1" for dust size class "3", "4" or "5", lower dust size
classes to be removed if visible on the surface to be coated without
magnification (ISO 8502-3:1992)
SECUNDARY SURFACE – during storage and construction, contamination of the prefabrication primer
PREPARATION should be limited
– after fabrication, surface defects should be treated according to the scheme
below
– where two possible surface treatments are indicated, the choice of treatment
is dependent on the location and on the system to be applied (see system
sheets)
– the preferred pretreatment for optimal results is shown; other possibilities are
indicated in brackets
areas immersed atmospheric
conditions conditions
contamination to be removed or to be removed
ISO 8501-3 grade P2
weldseams ISO-Sa2½ (SPSS-Pt3) SPSS-Ss (SPSS-Pt2)
or
ISO 8501-3 grade P2
burned ISO-Sa2½ (SPSS-Pt3) SPSS-Ss (SPSS-Pt2)
or
ISO 8501-3 grade P2
damaged corroded ISO-Sa2½ (SPSS-Pt3) SPSS-Ss (SPSS-Pt2)
or
ISO 8501-3 grade P2
white rust SPSS-ID Pt2 (SCAP SPSS-ID Pt1 (SCAP *)
*) or
ISO 8501-3 grade P2
* cleaning by silicon carbide impregnated abrasive pad
Dust quantity rating "1" for dust size class "3", "4" or "5", lower dust size classes to be
removed if visible on the surface to be coated without magnification (ISO 8502-3).
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SIGMAWELD 160
April 2012
Note that the back of welded plate may show discoloration (especially on plate where
fillets have been welded on), this is not to be confused with burned areas and does not
require special treatment.
Burned through areas may be present (this happens especially when welding thin steel)
and these should then be treated as per 'burned areas' above.
INSTRUCTIONS FOR USE mixing ratio by volume: binder to paste 55 : 45
– the temperature of the mixture of binder and paste should preferably be
above 15°C
– stir the paste thoroughly before adding the binder
– add gradually one third of the binder to the pigment paste
– stir thoroughly till homogeneous
– add remaining binder and continue stirring until the mixture is homogeneous
– mixed paint is ready for use
– some addition of thinner (Thinner 90-53) might be necessary depending on
routing, line speed and steel temperature
– agitate continuously during application
Pot life 24 hours at 20 °C
AIR SPRAY
Recommended thinner Thinner 90-53
Volume of thinner 0 - 35%, depending on required thickness and application conditions
Nozzle orifice 1.0 - 1.5 mm
Nozzle pressure 0.3 MPa (= approx. 3 bar; 44 p.s.i.)
AIRLESS SPRAY
Recommended thinner Thinner 90-53
Volume of thinner 0 - 35%, depending on required thickness and application conditions
Nozzle orifice approx. 0.49 - 0.64 mm (= 0.019 - 0.025 in)
Nozzle pressure 8 - 12 MPa (= approx. 80 - 120 bar; 1160 - 1740 p.s.i.)
CLEANING SOLVENT – Thinner 90-53
ADDITIONAL DATA highly pigmented zinc silicate primers produce dry films with void spaces in
between the particles
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SIGMAWELD 160
April 2012
Worldwide availability Whilst it is always the aim of Sigma 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
Cleaning of steel and removal of rust see information sheet 1490
Relative humidity - substrate temperature -
air temperature see information sheet 1650
SAFETY PRECAUTIONS – for paint and recommended thinners see safety sheets 1430, 1431 and
relevant material safety data sheets
– this is a solvent borne paint and care should be taken to avoid inhalation of
spray mist or vapour as well as contact between the wet paint and exposed
skin or eyes
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SIGMAWELD 160
April 2012
WARRANTY
PPG warrants (i) its title to the product, (ii) that the quality of the product conforms to PPG’s specifications for such product
in effect at the time of manufacture and (iii) that the product shall be delivered free of the rightful claim of any third person for
infringement of any U.S. patent covering the product. THESE ARE THE ONLY WARRANTIES THAT PPG MAKES AND ALL
OTHER EXPRESS OR IMPLIED WARRANTIES, UNDER STATUTE OR ARISING OTHERWISE IN LAW, FROM A COURSE
OF DEALING OR USAGE OF TRADE, INCLUDING WITHOUT LIMITATION, ANY OTHER WARRANTY OF FITNESS FOR A
PARTICULAR PURPOSE OR USE, ARE DISCLAIMED BY PPG. Any claim under this warranty must be made by Buyer to PPG
in writing within five (5) days of Buyer’s discovery of the claimed defect, but in no event later than the expiration of the applicable
shelf life of the product, or one year from the date of the delivery of the product to the Buyer, whichever is earlier. Buyer’s failure
to notify PPG of such non-conformance as required herein shall bar Buyer from recovery under this warranty.
LIMITATIONS OF LIABILITY
IN NO EVENT WILL PPG BE LIABLE UNDER ANY THEORY OF RECOVERY (WHETHER BASED ON NEGLIGENCE
OF ANY KIND, STRICT LIABILITY OR TORT) FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
DAMAGES IN ANY WAY RELATED TO, ARISING FROM, OR RESULTING FROM ANY USE MADE OF THE PRODUCT.
The information in this sheet is intended for guidance only and is based upon laboratory tests that PPG believes to
be reliable. PPG may modify the information contained herein at any time as a result of practical experience and
continuous product development. All recommendations or suggestions relating to the use of the PPG product,
whether in technical documentation, or in response to a specific inquiry, or otherwise, are based on data, which to the
best of PPG’s knowledge, is reliable. The product and related information is designed for users having the requisite
knowledge and industrial skills in the industry and it is the end-user’s responsibility to determine the suitability of
the product for its own particular use and it shall be deemed that Buyer has done so, as its sole discretion and risk.
PPG has no control over either the quality or condition of the substrate, or the many factors affecting the use and
application of the product. Therefore, PPG does not accept any liability arising from any loss, injury or damage
resulting from such use or the contents of this information (unless there are written agreements stating otherwise).
Variations in the application environment, changes in procedures of use, or extrapolation of data may cause
unsatisfactory results. This sheet supersedes all previous versions and it is the Buyer’s responsibility to ensure that
this information is current prior to using the product. Current sheets for all PPG Protective & Marine Coatings Products
are maintained at www.ppgpmc.com. The English text of this sheet shall prevail over any translation thereof.
PDS 6827
310060 grey 5000002180
320204 reddish grey 5010002180
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