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Can you spray/paint uPVC windows
LTI TransformationsJun 21, 2022 4:03:00 PM2 min read

Can you spray/paint uPVC windows?


We're often asked whether it can be beneficial to spray or paint uPVC windows, and in most cases, the answer is yes, however, it depends on the condition of the windows, the preparation you carry out and the quality of the finish. 

For example, a growing number of homeowners in the UK are opting for anthracite grey uPVC windows to achieve a sleek, modern look. If your window frames and glass are in good condition, then it makes sound financial sense to spray them, however, to achieve a professional/factory finish which will serve you well for many years to come, you require a fully comprehensive system similar to respraying a car.

Spray uPVC like a pro

With an HVLP sprayer, you can atomize paint more swiftly, accurately, and softly than you would with a regular paint gun, resulting in a smoother spray. You'll also require two-pack polyurethane chemically curing paint and UV filtering lacquer, ensuring excellent weather resistance and UV stability.

A six-step process for success

Remove existing silicone

The first step is to remove all sealant and any other residue from the surface of the uPVC. You may find you save time and energy by using a wire brush fitted to a drill.

Clean/ degrease frames

Next up, thoroughly clean all window surfaces using white or methylated spirits. The cleaner the windows are, the better the paint will adhere.

Masking and preparation

You'll also need to mask up all areas you don't wish to paint using brown masking paper and tape. Once complete, lightly sand all surfaces with 220 or 240-grit sandpaper to ensure the paint will adhere to the uPVC.

Base and topcoat

It's now time to spray on a coat of etching primer, which will provide outstanding adhesion to a typically challenging surface like uPVC. A high-quality UPVC primer is the best choice because you can use it for many other aspects of your home's exterior, such as doors, downpipes and fascia.


Once the final coat is dry, you can apply two coats of UV filtering lacquer for optimum durability, allowing each coat to dry for around one hour before applying the next. If you're looking to achieve a professional finish, it's worth noting that this process can be time-consuming and will require some experience with spray paint.

Apply new silicone to finish

To finish, simply re-apply new silicone to the perimeter of each window. It's essential to take your time and ensure you leave no small gaps or cracks. When windows and doors aren't sealed properly, cold air floods the property, and the warm air from your home escapes. This leads to higher energy costs in the long run, so whilst this is a relatively simple step, it's crucial to get it right!

Why expertise and experience are essential

For best results, we recommend working with a specialist company with the equipment and expertise to perform the job correctly, such as LTI Transformations.

With decades of hands-on experience, we can transform the appearance of your home. Whether you're looking to change your uPVC windows from white to anthracite grey or freshen up your exterior with a leaf green hue to complement the surrounding countryside, we've got you covered.

To learn more about us and how we can help you, please call us on 0800 771 0097 or send us a message here