SigmaDur 520
£192.36 (inc. VAT)
£160.30 (ex. VAT)
- Can’t see your colour? Contact us — we can probably mix it
PPG SigmaDur 520 – High-Build Semi-Gloss Polyurethane Finish
PPG SigmaDur 520 is a two-component, high-build aliphatic acrylic polyurethane finish designed for long-term durability in industrial and marine environments. Offering excellent resistance to atmospheric exposure, it can be recoated an unlimited number of times, even after prolonged weathering, making it highly suitable for maintenance programs.
This tough, abrasion-resistant coating provides non-yellowing, non-chalking colour stability and cures at temperatures down to –5°C (23°F), ensuring year-round application. Available in thousands of colours, including RAL, BS, NCS, and the new NCS 2050 range, SigmaDur 520 delivers performance without compromising aesthetics. (Note: The aluminium version weathers to a grey finish.)
Easy to apply by roller or airless spray, it provides strong resistance to mineral and vegetable oils, paraffins, aliphatic hydrocarbons, and mild chemicals.
Key Features:
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Two-component, high-build aliphatic acrylic polyurethane finish
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Unlimited recoatability, even after long weathering
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Excellent resistance to UV, abrasion & atmospheric exposure
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Non-chalking, non-yellowing colour stability
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Cures down to –5°C (23°F)
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Resistant to splash of oils, paraffins & mild chemicals
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Easy application by roller or airless spray
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Available in RAL, BS & NCS
Surface Preparation
Substrate conditions
• Previous coat (epoxy or polyurethane) must be dry and free from any contamination
• Surface of previous coat should be sufficiently roughened if necessary
Substrate temperature and application conditions
• Substrate temperature during application and curing down to -5°C (23°F) is acceptable; provided the substrate is
free from ice and dry
• Substrate temperature during application and curing should be at least 3°C (5°F) above dew point
• Relative humidity during application and curing should not exceed 85%
• Premature exposure to early condensation and rain may cause color and gloss change
Technical Data
Pot life
5 hours at 20°C (68°F)
Note:
- See ADDITIONAL DATA – Pot life
Spreading rate and film thickness – White
DFT Theoretical spreading rate
50 µm (2.0 mils) 11.6 m²/ (465 ft²/US gal)
75 µm (3.0 mils) 7.7 m²/ (310 ft²/US gal)
Directions for Use
Mixing ratio by volume: base to hardener 88:12 (7.33:1)
• The temperature of the mixed base and hardener should be above 10°C (50°F), otherwise extra thinner may be
required to obtain application viscosity
• Adding too much thinner results in reduced sag resistance
• Thinner should be added after mixing the components
• Aluminum version has lower gloss than the standard version and the color could be different by application method
Air spray
Recommended thinner
THINNER 21-06
Volume of thinner
5 - 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 21-06
Volume of thinner
0 - 5%, depending on required thickness and application conditions
Nozzle orifice
Approx. 0.46 mm (0.018 in)
Nozzle pressure
15.0 MPa (approx. 150 bar; 2176 p.s.i.)
Brush/roller
Recommended thinner
THINNER 21-06
Volume of thinner
0 – 5%
Cleaning solvent
• THINNER 90-53
Data Sheets
We aim to deliver your products as quickly, safely and efficiently as possible. Below you'll find a full overview of our delivery process, options, pricing and terms. If you have any questions or a time-sensitive order, our team is always happy to help — just give us a call on 01902 712286.
📦 Standard Delivery
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Free delivery on all orders over £100 + VAT within UK mainland.
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For orders under £100 + VAT, a standard shipping fee will apply at checkout.
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Orders are typically delivered within 2–5 working days after receipt of cleared payment.
We use Parcelforce and FedEx as our main carriers, though this may vary based on location or size of your order.
⚠️ Important Notes on Delivery
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Orders placed after 12 midday (Monday–Friday) are usually dispatched the next working day.
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If you require urgent dispatch or Saturday delivery, please call us before placing your order.
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Do not schedule contractors or start work until goods have arrived and been checked — we cannot be held responsible for project delays due to late or damaged deliveries.
🚚 Next Day & Timed Delivery Options
We offer express shipping for orders needing a quicker turnaround:
| Service | Typical Cost* (Ex. VAT) |
|---|---|
| Next Day Delivery | £10.50 |
| Next Day AM Delivery | £15.00 |
| Specialist Items | £22–£25+ |
*Pricing depends on order contents and size. For mixed/tinted paint or specialist coatings, next-day delivery may cost more due to courier restrictions.
Please contact us if your order is time-sensitive — we’ll confirm what options are available based on your products and location.
📍 Delivery Outside UK Mainland
International Delivery
We are pleased to offer worldwide delivery on both parcel and pallet orders.
Parcel Shipments
All international parcel deliveries are handled by FedEx International. Shipping times and costs vary depending on destination, parcel size, and service availability.
Pallet Shipments (Including Dangerous Goods)
For palletised orders — including those containing dangerous goods - we work with independent specialist freight companies experienced in compliant global hazardous materials transport.
Due to the nature of these shipments, pricing and transit times are provided on a case‑by‑case basis.
Requesting an International Delivery Quote
If you would like to place an international order, simply get in touch and we will prepare a personalised shipping quote. Please provide the following details:
- Your full name
- Delivery address (including country and any required customs information)
- Details of the items you would like to order
- Quantities for each item
Once we have this information, we’ll handle the rest - from calculating the most suitable shipping method to arranging safe and compliant delivery to your destination.
🛠️ Specialist Products & Pallet Deliveries
Some coatings are made to order, particularly from premium brands like Sigma/PPG. These orders:
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May have longer lead times
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May carry a £150 + VAT delivery charge
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Could require pallet delivery — a separate charge may apply
If your order requires palletisation, we’ll contact you after checkout to confirm delivery costs. You're also welcome to contact us first for a delivery quote before placing the order.
📦 Stock & Availability
We hold a large amount of stock ready for immediate dispatch, but:
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Some products may need to be ordered in from manufacturers
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Specialist items may be tinted or made to order, causing additional lead time
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We’ll always aim to part-deliver where possible to avoid unnecessary delays
If you’re on a strict deadline, please get in touch before ordering so we can advise on delivery timeframes.
🚫 Delivery Liability
While we work hard to ensure your order arrives safely and on time, we use third-party carriers and cannot be held liable for:
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Delays in transit
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Lost shipments
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Goods damaged in delivery
If your order is damaged or delayed, please let us know as soon as possible. We are not always informed automatically by the courier, so your input is essential.
We will work with you to resolve any issues — whether that means replacing items or chasing the carrier.
Note: Address changes after dispatch may incur additional charges, so please double-check your delivery details at checkout.
🧾 Payments & Order Processing
Orders are only processed once full cleared payment has been received.
You will receive email updates at each stage of the process:
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Pending – order received
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Processing – being picked, packed or manufactured
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Dispatched – on the way with the carrier
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Back order / Part dispatched – if stock is split or delayed
Need Help?
If you're unsure about shipping costs, timelines, or need your order by a specific date, we strongly recommend giving us a quick call before placing your order:
📞 01902 712286
📧 info@andrewscoatings.co.uk
We're here to help make sure you get the right product, in the right place, at the right time.
