Which paint type should I choose (1K, 2K, 2K Air-Dry)?

1K is ready to use and suits lighter-duty jobs and touch-ups. 2K contains a built-in hardener for higher chemical and abrasion resistance on demanding surfaces. 2K Air-Dry provides 2K performance with a non-isocyanate hardener for easier handling. Note: our 2K aerosols are supplied as Acrylic Enamel only.

Do I need a primer, and which one is right?

Preparation is essential: clean, degrease and key the surface. Use the correct primer for the substrate: plastic adhesion primers for plastics, glass or fibreglass primers for those materials, and metal/etch primers for metals. Using the right primer improves adhesion and longevity.

How long does it take to dry, and when can I recoat?

For 1K, apply light passes and recoat after around 10–15 minutes; typical cure is about 30 minutes depending on conditions. For 2K, recoat after around 20–30 minutes, touch-dry is about 40 minutes, and full cure is usually 24–48 hours. Temperature and humidity affect all drying and curing times.

How much will I need (coverage & coats)?

A 400 ml aerosol typically covers up to approximately 2 m² per coat on smooth, primed surfaces. Most jobs need 2–4 coats depending on the colour, surface profile and the shade being covered.

Any tips for a smooth, professional finish?

Shake the can for 2–3 minutes and during use. Spray 15–25 cm from the surface in light, even passes with slight overlap. Keep the can upright and clear the nozzle with a short burst after use. Use adjustable fan patterns to suit the area and reduce overspray.

Can I spray indoors, and what safety should I consider?

Only spray indoors with excellent ventilation and appropriate PPE such as a respirator, gloves and eye protection. Protect surrounding areas from overspray. Refer to product data sheets for detailed safety and handling guidance.

RAL 5021 Water Blue Aerosol Spray Paint Cans, Tins & Pens

Product Name: RAL 5021 Water Blue Aerosol Spray Paint

Manufacturer: One Stop Aerosols

Product Code: RAL99

Price: £7.99 – £69.99

Availability:In Stock

RGB Colour Code: 0-117-119

Hexadecimal Colour Code: #007677

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

About our Paint

RAL 5021 Water Blue Aerosol Spray Paint is one of the colours from the RAL Classic Aerosol Spray Paint Colour Chart and is available in Cellulose, Acrylic and Synthetic Enamel aerosol systems.

All our paints are custom mixed using premium Lechler binders and colourants for a consistent, long-lasting finish.

RAL 5021 Water Blue Aerosol Spray Paint can be supplied as 400ml aerosols (1K or 2K with built-in hardener), litre tins, and touch-up pots or pens.

Choose your gloss level from Matt (0%) through to Full Gloss (90%).

Optional additives include UV protection and high-resistance packages for tougher environments.

Our aerosols feature a vari-nozzle for wide/narrow patterns, HVLP-style atomisation, minimal overspray and stable pressure.

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

Safety Data Sheets

Customer Reviews

Rachel W.

★ ★ ★ ★ ★

High-Resistance additive worth it for coastal property. ...read more

27 Jan 2025

Jacob N.

★ ★ ★ ★ ☆

Pens are handy for small scuffs on trims. ...read more

27 Mar 2025

George C.

★ ★ ★ ★ ★

Tin and aerosol looked identical once dry. ...read more

07 Aug 2024

Frequently Asked Questions

1K: Ready to use. Great for lighter-duty jobs and quick touch-ups.
2K: Built-in hardener in the can for superior chemical/abrasion resistance on demanding surfaces.
2K Air-Dry: 2K performance with a non-isocyanate hardener—easier handling, no separate activator.

Note: Our 2K aerosols are supplied as Acrylic Enamel only.

Good prep is essential: clean, degrease and lightly key the surface. Use the correct primer for the substrate:

Plastics: use a plastic adhesion primer (see our plastic primer).
Glass/Fibreglass: use appropriate glass/fibreglass primers.
Metals: use metal/etch primers; bare steel should be protected promptly.

1K: Light passes; recoat after ~10–15 mins. Typically cures in ~30 mins (conditions dependent).
2K: Recoat after ~20–30 mins. Touch-dry ~40 mins; full cure 24–48 hrs.

Temperature and humidity affect all drying/curing times—test first on a small area.

A 400 ml aerosol typically covers up to ~2 m² per coat on smooth, primed surfaces. Expect 2–4 coats depending on colour, surface profile and the shade you’re covering.

Shake for 2–3 minutes and intermittently during use.
Spray 15–25 cm from the surface in light, even passes; overlap each pass slightly.
Keep the can upright; clear the nozzle with a short burst after use.
Use our vari-nozzle’s wide/narrow fan to suit the area and reduce overspray.

Only with excellent ventilation and appropriate PPE (respirator, gloves, eye protection). Protect surrounding areas from overspray. See our data sheets for details:

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.