Should I choose 1K or 2K for my project?

1K is ready to use and suited to light to medium duty and touch-ins. 2K is hardener activated and offers higher chemical and abrasion resistance for exterior metalwork, shopfronts and high-traffic areas.

What PPE do I need, especially for 2K?

Use appropriate respiratory protection, eye protection and gloves, with good ventilation. Follow the product safety data sheet for detailed PPE guidance, especially with 2K systems.

What is pot life and why does it matter for 2K?

Pot life is the workable time after hardener activation. Once expired, the coating thickens and performance drops. Activate only what you can use within the recommended window; temperature will affect pot life.

Can I apply 2K over an existing 1K coating?

Yes, if the existing coating is sound. Clean, degrease and abrade to a uniform key, and use a compatible primer where needed. Always test a small area first.

Which sheen works best outside or on high-touch surfaces?

Satin 30 percent is a common choice for shopfronts and doors. Semi gloss 60 percent offers a brighter look with good cleanability. Full gloss 90 percent maximises shine but highlights surface imperfections.

Do aerosols cover as well as tins and what is a typical yield?

A 400 ml aerosol typically covers up to around 2 square metres per coat. Tins with compliant spray gear can deliver higher transfer efficiency. Coverage depends on colour, surface profile and application technique.

RAL Effect 660-M - Sky Blue Aerosol Spray Paint 400ml

Buy RAL Effect 660-M - SKY Blue Aerosol Spray Paint 400ml, colour matched & mixed to order. Available in 1K or 2K with matt, satin or gloss finishes. Professional fan nozzel, even coverage & fast UK delivery.

Product Name: RAL Effect 660-M - Sky Blue Aerosol Spray Paint

Manufacturer: One Stop Aerosols

Product Code: RAL11990

Price: £12.99 – £74.99

Availability:In Stock

RGB Colour Code: 85-151-157

Hexadecimal Colour Code: #55979D

30-day returns policy on all eligible faulty products. Read more about our returns policy.

About our Paints

RAL Effect 660-M - SKY Blue Aerosol Spray Paint is part of the RAL Effects Aerosol Spray Paint Colour Chart. We mix every order from fresh using quality Lechler binders and colourants, so the shade you choose stays consistent across aerosols and tins.

Formats & sizes: 400ml aerosols in 1K (ready to use) or 2K (with built-in hardener), litre tins, plus repair pots/pens for touch-ups.
Finish options: Matt 0%, Satin 30%, Semi 60%, or Full Gloss 90%—pick the sheen that suits your project.
Optional extras: Add UV Protection for outdoor use or a High-Resistance package for tougher, high-traffic or coastal environments.
Smoother spraying: Our vari-nozzle lets you switch between wide and narrow fan patterns with HVLP-style atomisation for low overspray and an even finish.

The Lechler-based system provides excellent flow, adhesion and long-term colour stability across a wide range of substrates (use the correct primer where needed).

Tip: Not sure which paint type or gloss to choose? Tap the info buttons next to Size, Paint Type and Gloss Level, or send us a message. For a quicker reply, WhatsApp us here .

Please note: 2K aerosols are supplied in Acrylic Enamel only.

Safety Data Sheets

Customer Reviews

Isobel Y.

★ ★ ★ ★ ★

Satin looks premium on our doors. ...read more

24 Nov 2024

Gary Q.

★ ★ ★ ★ ★

2K still looks new after heavy footfall. ...read more

22 Nov 2019

Isla H.

★ ★ ★ ★ ★

Primer guidance was spot on for plastic. ...read more

28 Oct 2016

Frequently Asked Questions

1K: Ready to use, quick to apply, good for light to medium duty projects, small parts and touch-ins.

2K: Hardener activated, higher chemical and abrasion resistance, better for exterior metalwork, shopfronts and high-traffic areas.

Rule of thumb: If durability, cleaning resistance or exterior exposure are key, choose 2K.

Use appropriate respiratory protection, eye protection and gloves. Ensure good ventilation. Follow the product safety data sheet for specific PPE guidance, especially when using 2K systems.

Tip: Work in well ventilated spaces and avoid spraying near ignition sources.

Pot life is the workable time after the hardener is activated. After this window the material thickens and performance will drop. Only activate what you can use within the recommended time.

Tip: Warmer temperatures reduce pot life, cooler temperatures extend it.

Often yes, if the existing coating is sound. Clean, degrease and abrade to a uniform key. Use a compatible primer where needed and always test a small area first.

Avoid: Applying over poorly adhered, chalky or reactive finishes without proper preparation.

Satin 30%: Popular for shopfronts and doors, balances appearance and cleanability.

Semi gloss 60%: Brighter look with good wipe-down performance.

Full gloss 90%: Maximum shine and improved cleanability. Highlights substrate imperfections more than lower sheens.

A 400 ml aerosol typically covers up to approximately 2 m² per coat. Tins applied with compliant spray gear may achieve higher transfer efficiency. Coverage varies with colour, surface profile and technique.

Tip: Keep the nozzle clean and maintain consistent distance and speed for even film build.

Please note – Our aerosol cans, litre tins and touch up and repair pots/pens are custom mixed and should be tested before application. We do not take responsibility for any colour difference once you have applied the paint to your surfaces. If the colour is not accurate, please contact us to arrange a return.