PPG SigmaDur 541 – Non-Isocyanate Epoxy Acrylic Finish

PPG SigmaDur 541 is a two-component, non-isocyanate epoxy-acrylic topcoat designed for long-lasting protection and colour stability across large-scale architectural and infrastructure projects. Available in thousands of colours including RAL, BS, NCS and NCS 2050, it offers a high-quality decorative finish with excellent performance in demanding environments.

With good gloss and colour retention, a non-yellowing formulation, and a long pot life combined with fast drying, SigmaDur 541 provides smooth application and efficient project turnaround. It performs exceptionally well without thinning, making it suitable for both new builds and maintenance programmes.

Ideal for bridges, stadiums, commercial buildings, venues, transport infrastructure and large structural steelwork.

Key Features:

• Two-component, non-isocyanate epoxy-acrylic finish

• Available in RAL, BS & NCS 

• Good gloss & colour retention with non-yellowing performance

• Long pot life but fast drying for efficient application

• Smooth application without thinning required

• Ideal for commercial, structural and infrastructure environments

Surface Preparation

Substrate temperature
• Substrate temperature during application and curing should be above 5°C (41°F)
• Substrate temperature during application and curing should be at least 3°C (5°F) above dew point

Technical Data

Mixing ratio by volume: base to hardener 10:1
• Adding too much thinner results in reduced sag resistance
• The temperature of the mixed base and hardener should preferably be above 15°C (59°F), otherwise extra thinner
may be required to obtain application viscosity
• If required, thinner should be added after mixing the components

Induction time
0 minute

Pot life
8 hours at 20°C (68°F)

DFT Theoretical spreading rate
50 µm (2.0 mils) 11.4 m²/l (457 ft²/US gal)
60 µm (2.4 mils) 9.5 m²/l (381 ft²/US gal)

Directions for Use

Air spray
Recommended thinner
THINNER 91-92
Volume of thinner
0 - 10%, depending on required thickness and application conditions
Nozzle orifice
1.0 - 1.5 mm (approx. 0.040 - 0.060 in)
Nozzle pressure
0.3 - 0.4 MPa (approx. 3 - 4 bar; 44 - 58 p.s.i.)

Airless spray
Recommended thinner
THINNER 91-92
Volume of thinner
0 - 5%, depending on required thickness and application conditions
Nozzle orifice
Approx. 0.38 – 0.46 mm (0.015 – 0.018 in)
Nozzle pressure
15.0 MPa (approx. 150 bar; 2176 p.s.i.)

Brush/roller
Recommended thinner
THINNER 91-92
Volume of thinner
0 – 5%

Data Sheets

SigmaDur 541 TDS

SigmaDur 541 Base MSDS

SigmaDur 541 hardener MSDS