What Is Silicone Based Rendering?
Silicone based rendering is a modern exterior wall finishing system that uses silicone resin technology to create a water-repellent, breathable, and flexible protective coating for buildings.
Introduction
Compared to traditional sand and cement render, silicone render offers improved durability, reduced maintenance, and better resistance to cracking and staining.
It is commonly applied to residential and commercial buildings as a decorative and protective outer layer.
What Is Rendering?
Rendering is the process of applying a protective coat to external walls to improve appearance and shield masonry from weather damage.
- Protect masonry from weather
- Improve property appearance
- Increase property value
- Improve thermal performance (when used with insulation systems)
What Is Silicone Render Made Of?
- Silicone resins (for water repellency)
- Polymer-modified binders
- Mineral aggregates
- Pigments (pre-mixed colour)
- Additives for flexibility and adhesion
Key Benefits
Water Repellent
Repels rainwater rather than absorbing it, helping prevent damp issues and staining.
Breathable
Allows water vapour to escape, reducing trapped moisture and structural damp problems.
Flexible & Crack Resistant
Handles minor building movement and temperature changes better than traditional cement render.
Low Maintenance
Resistant to dirt and algae growth. Often does not require painting as colour is pre-mixed.
How Is Silicone Render Applied?
- Substrate preparation (brick, block, or insulation board)
- Base coat application
- Reinforcement mesh embedded
- Primer coat
- Silicone top coat finish
Silicone Render vs Other Render Types
| Feature | Silicone | Acrylic | Sand & Cement |
|---|---|---|---|
| Water Repellency | Excellent | Good | Poor |
| Breathability | High | Medium | Low |
| Flexibility | High | Medium | Low |
| Maintenance | Low | Medium | High |
Summary
Silicone based rendering is a high-performance exterior finish that combines water repellency, breathability, flexibility, durability, and low maintenance. It has become one of the most popular modern rendering systems due to its long lifespan and clean finish.
