Glass Shading Heat Reduction Paint for Windows

Coverage per size

• A 2.5L tin will cover approximately 50m² per coat when diluted 2:1 with water
• Adjusting the dilution ratio allows you to control how much light and heat are blocked. Applying straight will have the greatest blocking effect.

Recommended coats

• The number of coats depends on how much light and heat you wish to block. Each additional coat increases the blocking effect, allowing you to control the level of light reduction.

Example calculation

• For a 4m² window, mix 0.2 L of paint with 0.1 L of water. This mixture will cover one coat.
• Always dilute the glass shading paint using half the volume of water relative to the paint.

Surface Preparation

• Ensure glass is clean, dry, and free from grease or contaminants
• Remove any loose or flaking material
• Ensure surface temperature is above 5°C

Application

• Apply using a brush or roller
• Product can be applied undiluted for maximum shading / blocking effect
• Alternatively, dilute with clean water to adjust transparency
• Typical dilution: 2 parts paste : 1 part water, the less water the more light/visibility blocking
• Apply 1 or more coats as required
• Additional coats will increase the blocking effect
• Allow 1–2 hours between coats

Drying & Curing

• Touch dry: 1–2 hours
• Full drying time may be extended in cold or high-humidity conditions

Fast, Reliable & Fully Tracked UK Delivery

Every order is dispatched from our warehouse using a fully tracked DX or FedEx service, so you always know when your paint will arrive.

Delivery Options

• FREE Standard Delivery (orders over £75) Arrives in 2–3 working days
• Standard Delivery – £7.95 Arrives in 2–3 working days
• Express Delivery – £13.95 Next working day delivery when you order before 12:00 noon (Mon–Thu)
• Spending £75+? Select Express Upgrade at checkout and only pay the difference

Dispatch & Delivery Times (What Happens After You Order)

• Express delivery (order before 12:00 Mon–Thu) Dispatched same day, delivered next working day
• Standard delivery (Mon–Wed orders) Dispatched next working day, delivered 2–3 working days later
• Orders placed Thursday (standard delivery) Dispatched Friday for Monday delivery
• We do not dispatch or deliver on weekends or UK bank holidays

What to Expect on Delivery

Please provide a contact telephone number at checkout. This allows the courier to share tracking updates or contact you if there are any delivery issues.

Most orders require a signature on delivery. If you may not be available during the day, we recommend delivery to a workplace, business address, or another location where someone can sign.

Outside the UK Mainland?

Delivery prices shown apply to UK Mainland only.

For the Highlands, Islands, Northern Ireland, or non-mainland addresses, please contact us for a quick personalised quote via live chat, by calling 01482 222 421, or emailing info@specialistpaintsonline.co.uk.

Bottom Line

Order today, get fast and reliable delivery, track every step, and get painting without delays.

Free Delivery on Orders Over £75: Stock up on everything you need in one go and complete the job properly

• Fluxaf Power Clean: clean glass or plastic thoroughly before shading application
• Application Tools: Brushes, short pile rollers, extension poles for higher areas

These products are commonly combined for best long-term results.

SPO Glass Shading Heat Reduction Paint gives you instant relief from heat and glare by blocking sunlight on glass, acrylic, and clear panels. Its advanced formula lowers indoor temperatures, creating a cooler, more comfortable environment that boosts productivity and cuts energy costs, no expensive air conditioning required.

Key Benefits

• Stay Cooler, Work Smarter – Reduce heat and glare from direct sunlight to create a more comfortable & productive space for people and healthier conditions for plants.
• Protect What Matters – Blocks harmful UV rays to prevent stock, equipment, and furnishings from fading or overheating, while improving visibility indoors.
• Cut Your Energy Bills – By lowering heat build up, you’ll rely less on fans and cooling systems, saving money and energy every month.
• Boost Privacy & Security – The opaque finish helps shield interiors from view, deterring prying eyes and adding an extra layer of protection.
• Apply Quickly, See Results Fast – Low odour formula brushes on easily and dries in just 1–2 hours, ideal for homes, offices, and greenhouses.

Get cooler, more comfortable spaces fast, no hassle, no mess. SPO Glass Shading Heat Reduction Paint brushes on easily, dries in just 1–2 hours, and is ready to transform your glazing in a single coat. With next day delivery available, you can order today, paint tomorrow, and feel the difference within days.

• Colour: White
• Finish / Texture: Matt, solar-reflective film
• Base: Water-based polymer dispersion
• Specific Gravity: 1.68 @ 20 °C
• Total Solids: 70 %
• Pack Sizes: 5 L
• Coverage: Up to 20 m² per L (2 parts paint : 1 part water)
• Drying Times @ 20 °C: Touch-dry 1–2 h
• Re-coat Interval: When touch-dry (≈2 h)
• Minimum Application Temp.: 5 °C
• VOC Content: Low
• Flash Point: Non-flammable
• Application Method: Brush or roller; dilute 2 : 1 with water
• Surface Suitability: Glass, acrylic, polycarbonate
• Storage: Protect from frost and excessive heat

Need detailed specs or prep guidance? Chat with our experts today, and cool temperatures tomorrow.

Technical Data Sheet

Safety Data Sheet

1. What is SPO Glass Shading Heat Reduction Paint used for?

SPO Glass Shading Heat Reduction Paint is a water-based coating designed to lower interior temperatures in greenhouses, factories, and other glass structures. It filters out excessive sunlight, helping maintain cooler conditions.

2. How does it reduce heat buildup?

The paint’s reflective properties help deflect intense sunlight, preventing the interior from overheating. This keeps plants, equipment, and occupants safer and more comfortable, potentially reducing cooling costs.

3. Is it suitable for different types of transparent surfaces?

Yes. This paint adheres to glass, acrylic, polycarbonate, and various other transparent materials, offering broad usage possibilities in different environments.

4. How do I apply the paint?

You can mix the paste to your desired dilution ratio, then apply using a brush or a short pile roller. Ensure the surface is clean and dry before painting. A thin, even coat helps achieve optimal results.

5. How long does it take to dry?

Typically, the paint is touch-dry within 1–2 hours, depending on temperature and humidity. This quick drying time means you can re-coat or make adjustments sooner, minimising project downtime.

6. Will this paint block too much light for greenhouse plants?

You can customise the dilution to balance heat reduction with adequate light transmission for plant growth. Start with a lighter application and adjust coverage based on your specific shading requirements.

7. How long does the heat-reducing effect last?

When applied correctly, the paint provides a long-lasting, cooling barrier throughout the hot season. Reapply as needed if you notice diminished effectiveness over time or after heavy weather exposure.

Need more guidance on controlling heat and sunlight in your space?

For tailored advice or additional information, contact our experts now via live chat—we’re here to help you create a cooler, more comfortable environment!