DIY Guide: How to Apply Silicone Render Like a Pro – Tips and Tricks Included!

Looking to apply silicone render to your home or building? Look no further than this step-by-step DIY guide!

Silicone render is an excellent choice when it comes to enhancing the appearance and durability of your home’s exterior. If you’re considering a DIY project to apply silicone render, you’re in the right place. In this comprehensive guide, we’ll walk you through the silicone render step-by-step process of achieving a flawless application. Plus, we’ve included valuable tips and tricks to help you achieve a professional finish that will stand the test of time.

With tips and tricks included, you’ll be able to achieve a professional-looking application that will leave your property looking great for years to come.

What is Silicone Render and Why Use it?

Definition of Silicone Render

Silicone render is a type of external wall finish that offers both aesthetic and functional benefits. It’s a mixture of silicone resin, aggregates, and water repellent agents. This combination creates a breathable yet water-resistant surface that protects your walls while maintaining a visually appealing appearance.

The silicone element contributes to the render’s flexibility, making it ideal for areas prone to movement.

Benefits of Using Silicone Render

  • Weather Resistance: One of the most significant advantages of silicone render is its exceptional ability to withstand various weather conditions. Whether it’s heavy rain, strong winds, or temperature fluctuations, silicone render can handle it all, keeping your walls looking pristine year-round
  • Breathability: Unlike conventional renders that can trap moisture, silicone render allows water vapor to escape. This breathability prevents the accumulation of moisture within the walls, reducing the risk of dampness and related issues.
  • Longevity: When properly applied, silicone render can last for decades without fading, cracking, or deteriorating. This durability makes it a worthwhile investment in the long run, saving you from frequent maintenance.
  • Low Maintenance: Thanks to its self-cleaning properties, silicone render helps keep your exterior walls looking fresh. Rainwater can wash away dirt and debris, minimising the need for frequent manual cleaning.

Tools and Materials Needed for Applying Silicone Render

List of Tools Needed

  • Trowels:Invest in finishing, pointing, and notched trowels. These tools are essential for applying, shaping, and texturing the render.
  • Hawk or Board: A hawk or a flat board will serve as your rendering surface, allowing you to scoop and hold the render as you work.
  • Rasps & Scrapers: The rasping tools helps to create a flat surface on EPS insulation boards prior to base coat being applied.
  • Sponge Float: A sponge float versatile tool is crucial for achieving a uniform and professional texture on the surface.
  • Brush: A brush is handy for pre-wetting surfaces and cleaning tools during the application process.
  • Mixing Paddle or Drill: Achieve a consistent render mix by using a mixing paddle or drill to blend the ingredients.
  • Protective Gear: Prioritise safety by wearing gloves, goggles, and a mask to shield yourself from potential hazards.

List of Materials Needed

  • Silicone Render Mix: Obtain a high-quality silicone render mix from a reputable supplier. Ensure it’s suitable for your project and climate conditions. We suggest Picking up a pre-mixed silicone render like EWI PRO (EWI-075) If you are a beginner.
  • Base Coat Adhesive: The adhesive acts as a foundation for the render. Choose one that’s compatible with the silicone render to enhance adhesion. We often use premium base coats such as EWI-225.
  • EPS External Insulation (Optional): If you are looking to save long term on energy costs then it maybe a good idea to use external insulation (10mm up to 100mm).
  • Bonding Adhesive (Required If using External Insulation): Adhesive will be used to bond external insulation boards onto the brick/block wall or existing render.
  • Pin Hammer Fixings (Required If using External Insulation): Pin Hammer Fixings are needed to fix external insulation boards into place and to make sure the boards have been secured.
  • Render Corner Bead & Stop Bead: These beads will be used around the edges of walls, around windows an at the bottom of where insulation boards sit.
  • Mesh Reinforcement: If your walls require additional support, consider using mesh reinforcement to prevent cracking.
  • Primer: Apply a primer that’s designed to work seamlessly with the chosen render. This step optimises adhesion and ensures a lasting finish.
  • Water: Water is essential for mixing the render and cleaning tools. Use clean water to achieve the desired consistency.

Step-by-Step Guide on How to Apply Silicone Render



Surface Preparation

Before diving into the application process, your walls need to be in optimal condition. Begin by thoroughly cleaning the surface, removing dust, dirt, and loose particles. Repair any cracks or defects with appropriate fillers. Once the repairs are complete, apply a suitable primer to enhance the bond between the surface and the render.

Weather Conditions

Timing is crucial when applying silicone render. Choose a day with moderate temperature and low humidity. Avoid extremely hot, cold, or wet weather, as these conditions can affect the render’s curing process.


Applying the EPS External Insulation (Optional)

Start by cutting the external insulation boards down into manageable size and mixing the bonding adhesive. Next, coat one side of the board with adhesive and fix them securely into the wall (You will need to start from bottom of the wall and work your way up). While you are applying these insulation boars boards remember to install stop beads and rendering corner beads into place.

rasp the EPS insulation boards

It is very important to create a even and flat surface using the rasping tool at this stage.Otherwise, it can become very difficult for beginners to straighten and flatten out the walls within base coat and silicone rendering coats.

Mixing the Render

Follow the manufacturer’s instructions to create a consistent render mix. Whether you’re mixing by hand or using a drill, ensure the ingredients are thoroughly blended. Consistency in the mix is key to achieving a smooth application.

Applying the First Coat

Start by applying a thin, even layer of base coat adhesive to the prepared surface. If you’re using mesh reinforcement, embed it into the adhesive. Allow sufficient drying time as recommended by the manufacturer.

Applying the Second Coat

With the base coat in place, it’s time to apply the first layer of silicone render. Use a trowel to evenly spread the render over the surface. Aim for a uniform thickness and texture. Once applied, allow this layer to set before moving forward.

Finishing Touches

For the final layer of silicone render, again use your trowel to apply the material. As the render starts to dry, employ a sponge float to create a consistent and professional texture. This step requires a gentle touch to achieve the desired finish. Remember, cleaning your tools promptly after use ensures their longevity and effectiveness.

Tips and Tricks for Applying Silicone Render Like a Pro

Choosing the Right Colour

While functionality is essential, aesthetics matter too. Select a colour that complements your property’s overall style. To ensure the perfect match, request samples from the manufacturer and assess them under different lighting conditions.

Maintaining Consistency

Consistency is vital throughout the process. Follow the manufacturer’s guidelines for mixing ratios, application techniques, and drying times. Avoid rushing through any step to achieve a flawless result.

Avoiding Common Mistakes

  1. Take Your Time: Rushing through the application process can lead to uneven surfaces and subpar results. Exercise patience and attention to detail at every stage.
  2. Wet Tools: Keep your tools slightly damp while applying the render to prevent it from sticking. This technique contributes to smoother application and a more professional finish.


Recap of Steps

Incorporating the steps outlined in this guide will empower you to achieve a professional-grade silicone render application. From meticulous surface preparation to mastering the art of applying each coat, you’ve laid the foundation for a stunning exterior transformation.

Final Thoughts and Recommendations

Undertaking a silicone render application as a DIY project is commendable. However, if you encounter uncertainties or complexities, don’t hesitate to seek professional advice. This investment in your property’s exterior not only enhances its aesthetics but also offers long-lasting protection against the elements.

By following this detailed guide and integrating the provided tips and tricks, you’re well-equipped to apply silicone render like a seasoned pro. The right tools, materials, and techniques, coupled with patience and dedication, will yield remarkable results that you can admire for years to come. As you embark on this transformative journey, remember that attention to detail and a commitment to excellence are the keys to achieving a flawless and enduring finish. Happy rendering!

Here at Plaster House LTD our team are highly experienced in silicone rendering and are on hand to help you with your home renovation project in London!


Need more convincing for silicone rendering your home?

We are real advocators of silicone rendering and are sure that you will love it too! read our blog for why you should silicone render your home.


Can you apply silicone render over existing render?

Yes, applying silicone render over existing render is possible, but certain considerations must be taken into account. The key is to ensure that the existing render is in good condition and properly prepared to receive the new silicone render layer.

Can silicone render be patched?

Yes, silicone render can be patched when minor areas require touch-ups or repairs. Patching silicone render involves carefully addressing localised damage without affecting the overall appearance of the wall.

Here’s how to do it:

  1. Clean and Prepare: Clean the area around the damaged section to remove any loose or compromised render. Ensure that the surface is clean and free from dust and debris.
  2. Priming: Apply a layer of primer to the patched area. This primer should be compatible with both the existing silicone render and the new patch.
  3. Patching: Using the same silicone render mix as you used for the original application, carefully fill in the damaged area. Blend the new render seamlessly with the surrounding texture to create a uniform look.
  4. Finishing: Use a sponge float or appropriate tool to texture the patched area to match the rest of the wall. This step ensures a consistent appearance.

Does silicone render need painting?

No, silicone render typically does not need painting. One of the notable advantages of silicone render is that it comes in a range of vibrant colours, and the colour is mixed throughout the material during manufacturing. This means that the colour remains consistent throughout the entire render layer, eliminating the need for painting.

The durable colour retention of silicone render is due to its resistance to fading, even when exposed to sunlight and harsh weather conditions. This property ensures that your property’s exterior maintains its attractive appearance for years without the need for additional painting.