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Application

Structural steel framing.

Description

Gloss, two pack, aliphatic polyurethane topcoat

  • For shop or site application.
  • Excellent resistance to atmospheric conditions.
  • Gloss and colour retention: Up to ten years.
  • Resistant to a range of corrosive and marine environments. Suitable for use in environments C1–C5 (to ISO 12944) with suitable primer and intermediate coat.
  • Easily cleaned.
  • Easily recoated.
  • Gloss finish in RAL and BS colours.
  • Contains isocyanates: Use SigmaDur 540 where isocyanate content is inappropriate.
  • Suitable for use as a top coat for intumescent systems in environments C1–C5 (to ISO 12944).

Preparation:

  • Suitable for application over PPG Protective & Marine Coatings primers and intermediate coats; SigmaCover 280, SigmaFast 278, SigmaZinc 109 HS, SigmaCover 435 and SigmaCover 456.
  • Product is supplied as two packs in correct proportions for use.
  • Air temperature 0–40ºC. Surface temperature -5–40ºC. Surface temperature must exceed dew point by 3ºC.
  • Drying times vary with environmental conditions. Indicative: At 20ºC a coat can be touch dry in one hour, dry to handle in six hours. Consult manufacturer.
  • Application: Airless or conventional spray, brush or roller. Brush or roller application may require additional coats.
  • Check coating thickness using non destructive dry film thickness metre, e.g. Mikrotest or Elcometer.

Overcoating:

  • More than one coat may be required for full opacity.
  • Recoatable after six hours at 20ºC

Site safety, warranties, limited liability:

Consult manufacturer's information.

Application:

Structural steel framing.

General information
Finish

Gloss

Features

Two component aliphatic acrylic polyurethane

Unlimited recoatable

Excellent resistance to atmospheric exposure conditions

Good colour and gloss retention

Non-chalking, non-yellowing

Cures at temperatures down to -5°C (23°F)

Resistant to splash of mineral and vegetable oils, paraffins, aliphatic petroleum products and mild chemicals

Up to 10 years durability

Highways Approved Item No. 168

Material

Two component aliphatic acrylic polyurethane

Size

4 and 20 L

Uniclass 2015
Pr_35_31_22_79 Solvent-based finishing coatsPrimary
CAWS

G10/630 Galvanizing plus site-applied

G10/635 Thermally sprayed zinc coating plus site-applied

G10/640 Shop painting

G10/650 Site painting

G10/660 Shop plus site painting

M60/12 Gloss paint

M60/18 Special coating

M61/110 On site coating to primed steel

Specification data - Solvent-based finishing coats
Product Reference

PPG SigmaDur 550

Colour

White

Various other colours available, consult PPG for details.

Number of coats

One, thickness 50–60 µm

Recommended.

Thinner

Not permitted

Required, 21-06

Suitable for airless and air spray.

Formulation

Solvent borne

Volume solids

55%

Volatile organic compounds (VOCs)

334 g/kg (430 g/L to EC SED 1999/13/EC)

Standard product features

Colour:

White and various other colours.

Features:

  • Two component aliphatic acrylic polyurethane.
  • Unlimited recoatable.
  • Excellent resistance to atmospheric exposure conditions.
  • Good colour and gloss retention.
  • Non-chalking, non-yellowing.
  • Cures at temperatures down to -5°C (23°F).
  • Resistant to splash of mineral and vegetable oils, paraffins, aliphatic petroleum products and mild chemicals.
  • Up to 10 years durability.
  • Highways Approved Item No. 168.

Finish:

Gloss.

Material:

Two component aliphatic acrylic polyurethane.

Size:

4 and 20 L.

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