SIGMACOVER 280

Two component polyamide cured corrosion inhibiting epoxy primer
PRINCIPAL CHARACTERISTICS
– general purpose primer used in protective coating systems for
immersion and atmospheric exposure conditions
– good adhesion to steel and galvanized steel
– good adhesion to non ferrous metals
– good flow and wetting properties
– good water and corrosion resistance
– cures at temperatures as low as 5 °C
– suitable for touching up of weld seams and damaged epoxy
primers during construction
– long recoating intervals are possible when overcoating with
epoxy and polyurethane coatings
– can be overcoated with alkyd, chlorinated rubber, vinyl, epoxy and polyurethane coatings
– suitable for application to wet or dry abrasive cleaned substrates
– tolerant to a damp steel surface
– compatible with cathodic protection systems
– can be used in conjunction with Sigma Wet Blast Inhibitor
COLOUR AND GLOSS
red-brown and green – eggshell

Product Details
SKU: 7417 Category: Tags: ,

Basic Data At 20 °c

( For mixed product )
Mass density
approx. 1.4g/cm3
Solids content
approx. 57% by volume
Recommended
dry film thickness
50 – 125 μm
Theoretical
11.4 m2/ltr for 50 μm*
spreading rate
depending on the nature and condition of the substrate and the
application method employed
Touch dry after
approx. 30 minutes
Overcoating interval
min. 8 hours*
max. 3 – 6 months*
Full cure after
7 days*
Shelf life (cool,dry place)
12 months
Flashpoint
base and hardener – 26 °C

For immersion exposure
– steel; blast cleaned (dry or wet) to ISO Sa2½
– steel with approved zinc silicate shop primer; pretreated according to SPSS-Ss
for atmospheric exposure
– steel; pretreated to ISO-Sa2½ or ISO-St3
– shop primed steel; pretreated according to SPSS-Pt3
– galvanized steel; free from grease, salts and other contamination, preferably blast cleaned to (Rz) 30 μm
– substrate temperature should be above 5 °C and at least 3 °C above the dew point during application and curing

Mixing ratio: by volume; base to hardener 80 : 20
– the temperature of the mixed base and hardener should be above
15 °C, otherwise extra solvent may be required to obtain the
correct application viscosity
– too much solvent will result in lower sag resistance and slower cure
– thinner should only be added after proper mixing of the base and
hardener
Induction time at 20 °C
none
Potlife at 20 °C
8 hours

Method Of Application

AIRLESS SPRAY
Recommended thinner
91-92 (flashpoint 20 °C)
Volume of thinner
0 – 5% for 75 – 125 μm – 10 – 25% for 50 – 75 μm
Nozzle orifice
approx. 0.46 mm (0.018 inch)
Nozzle pressure
150 bar (approx. 2100 p.s.i.)
AIR SPRAY
Recommended thinner
91-92 (flashpoint 20 °C)
Volume of thinner
5 – 10%
Nozzle orifice
1.5 – 2.0 mm
Nozzle pressure
3 – 4 bar (approx. 43 – 57 p.s.i.)
BRUSH AND ROLLER
Recommended thinner
91-92 (flashpoint 20 °C)
Volume of thinner
0 – 5%
CLEANING SOLVENT
90-53 (flashpoint 30 °C)

Environmental

Complies with VOC specifications such as LEED etc.

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About SIGMACOVER 280


Two component polyamide cured corrosion inhibiting epoxy primer