If you are looking to buy silicone render systems, then EWI Store is the place for you! Silicone render systems are a great way to protect the exterior façade of your home. The silicone render system helps prevent penetrating damp, as well as helping to improve the external appearance of your home.

Silicone render systems are often described as crack-free render systems, due to their flexibility. The presence of fibreglass mesh within the basecoat layer allows the silicone render system to move with the building. Also, the silicone render topcoat itself is extremely flexible. Both of these features ensure that once a silicone render system is installed on your property, it will be maintenance-free for years to come!

Our EWI Pro silicone render systems have an unrivalled track record across Europe due to their ease of install, the quality of the products involved and the fact thousands of colours are available -all delivered to site the very next day!

What makes up a silicone render system?

A silicone render system is made up of several core components, although various features like windows and roofs will potentially require some additional items to be incorporated into the system.

The silicone render system is thin coat – this means that unlike monocouche or scratch renders, the silicone system is very thin. The benefit of this is that it makes it extremely flexible; hence it is often referred to as a crack-free render system.

The first core component of the silicone render system is the basecoat layer. This is sometimes referred to as a reinforcement layer and basically consists of a 6mm layer of cement based adhesive with a layer of fibreglass mesh embedded within.

Installing the basecoat layer within silicone render systems

To install the basecoat layer of the silicone render system, the adhesive is first mixed with the correct quantity of water (most of our adhesives require 6 litres of water). This basecoat adhesive is applied using a 10mm notched trowel held at a 45 degree to the wall. It is important to ensure the basecoat layer is not too thick, otherwise it will lose some of its flexibility. However it needs to be sufficiently thick to provide some impact resistance – as mentioned, 6mm is the ideal thickness of the basecoat layer in the silicone render system.

The next stage of installing this type of render system is to embed the fibreglass mesh – this can be done in one of two ways. The first is to apply the full 6mm layer of adhesive to the wall then push the mesh into the adhesive by drawing the notched trowel up over the wet basecoat; this will pull it through the mesh. The key is not being able to see any mesh once it is embedded, as otherwise it will poke through the silicone render system.

Some installers prefer to add the basecoat adhesive to the wall in two goes. The first time, they add 3mm of render to the wall, then press the mesh gently into this. The prior to the adhesive completely drying they add the second 3mm layer of adhesive – this creates the desired 6mm layer of adhesive and ensures the fibreglass mesh is embedded right in the middle of the adhesive. Remember this is key to the Silicone render system as it ensures the system is flexible once it has been installed.

The key to all thin coat Silicone render systems is preparation. There is no point trying to apply the final top coat render if the basecoat layer is not level and you can see mesh coming through the adhesive in areas. The reason for this is that the final top coat layer is only 1.5mm (or 1mm, 2mm or 3mm depending on the size of granulate used) thick – it is very unforgiving.

Prior to applying the final top coat of the silicone render system, the basecoat needs to be primed. This primer does two things – firstly it helps limit the absorptivity of the basecoat, ensuring water is not sucked from the render at too fast a rate. Secondly it helps increase the bond between the basecoat and the render itself.

The render is applied with a standard trowel to the trowel and the excess is removed, leaving an extremely thin layer of render on the wall. Once the render has been on the wall for 15 minutes or so, a plastic float is used to give the textured finish.

Features of the EWI Pro silicone render system

  • Pre-mixed render in 25kg tubs – ready to use straight out of the bucket!
  • Our silicone render systems are available in thousands of different colours, all available to be delivered to site the very next day!
  • Our systems are specifically designed not to crack!
  • Long lasting and maintenance free.
  • The renders are UV stable, so even the most vibrant colours don’t fade over time.
  • The silicone render systems are hydrophobic – meaning they are self cleaning.
  • Our render systems are easy to install and hundreds of installers up and down the country are benefiting from this!
  • Silicone render is breathable, meaning water vapour can cross the surface ensuring the building can breath – reducing the risk of condensation.