Does Your Project Require Rendering & Insulation?

How to Clean Silicone Render Like a Pro | The Ultimate Guide

Ah, the beauty of a freshly painted home! It’s like a breath of fresh air for your soul. And nothing beats the clean, modern look of silicone render on your exterior walls. But as time passes, dirt, stains, and mould can take over, making your home look dull and lifeless.

That’s where we come in – to help you clean and maintain your silicone render like a pro.

Silicone render is a popular choice for exterior walls for several reasons. For one, it’s highly durable and weather-resistant, making it ideal for harsh climates.

It’s also breathable, allowing moisture to escape inside your walls and preventing mould and rot. And let’s not forget the aesthetic appeal – silicone render comes in multiple colours, textures, and finishes, giving you plenty of options to express your style and personality.

However, even the most durable and beautiful render system can lose its charm over time if not correctly cared for. That’s why we’ve put together this ultimate guide to help you keep your silicone render looking new and fresh.

From removing dirt and stains to preventing future buildup, we’ve got you covered. So let’s dive in!

>> Also Read: How Much Does Silicone Render Cost in 2023?

Understanding Silicone Render

First things first, let’s define silicone render. It’s an exterior wall coating made of silicone resins, fillers, and pigments. This composition makes it highly flexible, breathable, and water-repellent. It also resists fading, cracking, and peeling, making it a low-maintenance option for homeowners.

Silicone render differs in several ways from other types of renders, such as acrylic or cementitious. For one, it’s more expensive due to its superior performance and quality, and it also requires a professional installer, as the application process is more complex and precise. However, the investment pays off in the long run, as silicone render lasts longer and looks better than its alternatives.

When it comes to colours, textures, and finishes, silicone render offers a wide range of choices. You can opt for a smooth or textured surface, a matte or glossy finish, and many hues that match your preferences or surroundings. Additionally, silicone render can be applied to various surfaces, such as brick, block, or concrete, giving you more flexibility in your design options.

>>Related Reading: Can You Apply Silicone Render Over Existing Render?

How to Clean Silicone Render: Cleaning Methods with Pros & Cons

Regular cleaning is essential to maintaining the beauty and longevity of your silicone render. It helps remove dirt, stains, and pollutants that can cause discolouration, degradation, or even health hazards. How often you clean your silicone render depends on several factors, such as the climate, location, and level of pollution in your area. Generally, it’s recommended to clean your render at least once a year or more frequently if you notice any signs of buildup or damage.

Now, let’s explore the different cleaning methods for silicone render and their pros and cons.

Pressure Washing Silicone Render

Pressure washing is a popular method for cleaning silicone render, especially for larger surfaces or heavily soiled areas. It involves using a high-pressure water spray to remove dirt and stains from the surface. The pressure can range from 1000 to 3000 psi, depending on the type and condition of the render.


  • Efficient and fast
  • Removes tough stains and debris
  • Doesn’t require chemicals


  • Can damage the render if used improperly
  • May cause water infiltration if not sealed properly
  • Requires professional equipment and training

ProGuard Exteriors are your local experts for external wall insulation, exterior wall coatings, coloured render systems, and exterior painting for your home.

ProGuard Exteriors are your first choice for quality local workmanship throughout the South East of England.

Call us today on 0800 612 5254 to arrange a free quote or get in touch for more information on how to protect and transform your home!

Cleaning Silicone Render with water force
ProGuard Exteriors
clearing silicone render

Using a Soft Brush to Clean Silicone Render

A soft brush is a gentle and effective way to clean silicone render, especially for delicate or hard-to-reach areas. It involves using a soft-bristled brush, water, and a cleaning solution to scrub the surface and remove dirt and stains.


  • Safe for the render
  • Can reach tight spaces and corners
  • Allows for targeted cleaning


  • Requires manual labour and time
  • May not remove deep stains or mould
  • Requires proper technique and cleaning solution

Removing Stains from Silicone Render

Silicone render can develop stains from various sources, such as algae, mould, or rust. Removing these stains requires different techniques and products, depending on the type and severity of the stain.

silicone render on external walls

a. Cleaning Mould and Mildew from Silicone Render

Mould and mildew can grow on silicone render, especially in damp or shaded areas. To remove them, you can use a mixture of bleach and water or a commercial mould remover. Apply the solution to the affected area, let it sit for a few minutes, and then rinse it off with water.

b. Using a Cleaning Solution on Silicone Render

A cleaning solution can help remove general dirt and stains from silicone render. You can use a mild detergent, such as dish soap or laundry detergent, mixed with water. Apply the solution to the surface using a soft brush or sprayer, then rinse it off with water.

c. Polishing Silicone Render to Restore Its Appearance

If your silicone render has lost its shine or colour, you can polish it to restore its appearance. You can use a silicone render polish or a wax-based sealer to create a protective layer and enhance the colour and texture of the render.


  • Can restore the look of the render
  • Protects the surface from future damage
  • Easy to apply


  • May require frequent reapplication
  • May change the texture or finish of the render
  • May not be suitable for all types of silicone render

Preventing Dirt Buildup on Silicone Render

Preventing dirt buildup is an effective way to reduce the need for frequent cleaning of silicone render. You can apply a water-repellent or a silicone protective paint coating to the surface, preventing water and pollutants from sticking to the surface and making cleaning easier in the future.

Cleaning silicone render requires proper technique, equipment, and products. Depending on your needs and preferences, you can choose from various methods and products to keep your render looking new and fresh. Remember to follow safety precautions and manufacturer’s instructions when cleaning and maintaining your silicone render.

How to Clean Silicone Render: DIY Cleaning 

If you’re up for the task, you can clean your silicone render like a pro by following these DIY cleaning steps:

1. Gather the Necessary Tools and Materials

Before starting the cleaning process, you must gather the necessary tools and materials. These may include:

  • A pressure washer: You can rent a pressure washer from a local hardware store.
  • A soft brush: Use a soft-bristled brush to clean the silicone render’s surface.
  • A cleaning solution: Choose a cleaning solution appropriate for silicone render. Alternatively, you can make your own cleaning solution using water, vinegar, and baking soda.

2. Prepare the Surface and Surrounding Areas

Before cleaning, you should prepare the surface and protect the surrounding areas. These may include:

  • Covering nearby plants, windows, and doors with plastic sheets to protect them from the cleaning solution and water.
  • Wetting the surface of the silicone render with water before cleaning.
  • Removing any loose debris or dirt from the surface of the render using a soft brush.

3. Apply the Cleaning Solution

Apply the cleaning solution to the silicone render according to the manufacturer’s instructions. Alternatively, you can use your homemade cleaning solution by mixing water, vinegar, and baking soda.

  • Spray the cleaning solution onto the surface of the silicone render.
  • Leave the solution on for a few minutes to soak into the render and break down any dirt or stains.
  • Use a soft brush to gently scrub the surface of the silicone render, paying particular attention to any areas with stubborn stains or mould.

>> Also Read: Does Silicone Render Crack?

4. Rinse the Surface

Once you have finished scrubbing the silicone render, rinse the surface thoroughly using a pressure washer or hose.

  • Start at the top of the wall and work your way down.
  • Use a high-pressure setting to remove all traces of the cleaning solution and any dirt or debris that has been dislodged.

5. Spot Clean Stains or Mold

If any stubborn stains or mould did not come off during the general cleaning process, you could spot-clean these areas.

  • Apply a small amount of cleaning solution directly to the affected area.
  • Use a soft-bristled brush to scrub the stain or mould.
  • Rinse the area thoroughly with water.

Maintenance of Silicone Render

Silicone render can last for many years if properly maintained. Here are some tips to help you keep your silicone render looking new and clean:

  • Prevent Dirt Buildup: Regularly rinse the silicone render with a hose to remove any dirt or debris that may have accumulated on the surface. This will help prevent staining and discolouration over time.
  • Use a Cleaning Solution: To keep your silicone render looking its best, you can use a cleaning solution designed for silicone render. This can help remove any dirt or stains that may have built up on the surface over time.
  • Polish the Surface: If your silicone render has become dull or discoloured, you can restore its appearance using silicone render polish. This will help to bring back the shine and lustre of the surface.
  • Inspect and Repair: Regularly inspect your silicone render for any signs of damage, such as cracks or chips. These should be repaired as soon as possible to prevent further damage and ensure your silicone render’s longevity.
  • Prevent Mold and Mildew: To prevent mould and mildew from forming on your silicone render, ensure the area is well-ventilated and does not stay damp for long periods. Additionally, remove any organic debris or materials that may have accumulated on the surface.

>>Also Read: Silicone Render Showdown: Finding the Best Option for Your Home

Keeping Your Silicone Render Looking Like New

Cleaning and maintaining your silicone render is essential for preserving its appearance and durability. By following the tips and techniques outlined in this ultimate guide, you can ensure that your silicone render stays clean, bright, and free from stains, mould, and dirt buildup.

Whether you hire a professional cleaning service or DIY the process yourself, it’s crucial to use the right tools, materials, and methods for the best results. With proper care and attention, your silicone render can last for many years and enhance the beauty and value of your property.

silicone render cleaning
cleaning stained render

Cleaning silicone render – FAQ’s

How often should i clean my silicone render?

The frequency of cleaning your silicone render depends on various factors, such as the location, weather conditions, and pollution levels. However, cleaning your silicone render at least once a year is recommended to maintain its appearance and prevent dirt buildup.

Can I pressure wash my silicone render?

Yes, pressure washing is a suitable cleaning method for silicone render, but it should be done carefully to avoid damaging the surface. Use a low-pressure setting and hold the wand at a slight angle to prevent water from penetrating behind the render.

>> Related Reading: How Long Does Silicone Render Take to Dry?

Can I use bleach to clean my silicone render?

Bleach can be used to clean silicone render, but it should be diluted with water to avoid discolouration or damage to the surface. A mixture of one-part bleach to four parts water is recommended.

Can I use a soft brush to clean my silicone render?

Yes, a soft brush can be used to clean silicone render, especially for spot-cleaning stains or dirt buildup. Use a gentle circular motion and avoid using abrasive or harsh materials that can scratch or damage the surface.

Can I clean my silicone render myself, or should I hire a professional?

You can clean your silicone render yourself if you have the necessary tools, materials, and knowledge of the proper cleaning techniques. However, if you’re not confident or have a large area to clean, it’s advisable to hire a professional cleaning service specialising in cleaning silicone render.

External Rendering & Insulation Specialists

ProGuard Exteriors Ltd is a highly rated external rendering and insulation company providing bespoke packages for homeowners, developers and businesses across South East England.

5-Star Google Reviews