The Story
Professional-Grade Surface Preparation for External Rendering
Bostik Renderers Stabilising Primer, powered by Plasprime® Technology, is developed for the rendering professional. It primes and stabilises both porous and non-porous external surfaces, ensuring excellent adhesion and a uniform substrate for new render applications. Grey in colour for easy visibility, it also contains approximately 20% recycled material, supporting more sustainable building practices.
Key Features & Benefits
- Exceptional surface key: Promotes render adhesion on concrete, brick, block, and plaster
- Replaces scratch coats: Eliminates the need for an initial keying layer on many substrates
- Controlled application: Grey tint ensures even, visible coverage
- Ready to use: No mixing required—apply directly with brush or roller
- Sustainable formulation: Contains ~20% recycled content
Technical Specifications
- Form: Viscous liquid
- Colour: Grey
- Coverage: 2–4 m² per litre depending on substrate
- Drying Time: Typically 24 hours
- Application Temperature: Above +5 °C
- Shelf Life: 12 months in unopened packaging
Application Guidelines
- Ensure surface is dry, clean, and free of dust, oil, or loose material.
- Apply directly from the container using a soft brush or roller.
- Allow to dry fully (approx. 24 hrs) before applying render.
Product Comparison: Stabilising Primer vs Common Alternatives
| Feature / Product | Bostik Renderers Stabilising Primer | SBR Bonding Agent | PVA Bonding Agent | Traditional Scratch Coat |
|---|---|---|---|---|
| Purpose | Priming & stabilising before render | Bonding agent for difficult substrates | Bonding & sealing | Mechanical keying layer |
| Porous Surfaces | ✔ | ✔ | ✔ | ✔ |
| Non-Porous Surfaces | ✔ | ⚠ Requires mechanical key | ✘ | ✘ |
| Replaces Scratch Coat | ✔ | ✘ | ✘ | N/A |
| Ready to Use | ✔ | ✘ (dilution needed) | ✘ (dilution needed) | ✘ (site mix) |
| Coloured for Visibility | ✔ Grey | ✘ Clear/white | ✘ Clear | ✘ |
| Interior/Exterior Use | ✔ Both | ✔ Both | ✘ Mainly interior | ✔ Both |
| Adhesion Strength | ⭐⭐⭐⭐ | ⭐⭐⭐⭐ | ⭐⭐ | ⭐⭐⭐ |
| Contains Recycled Material | ✔ ~20% | ✘ | ✘ | ✘ |
Storage & Safety
- Store upright between +5 °C and +30 °C in a dry place, protected from frost and sunlight
- Secure lid tightly after use to prevent drying
- Clean tools immediately with water
- Refer to SDS for full handling precautions
Bostik Renderers Stabilising Primer simplifies exterior wall preparation—cutting labour, increasing consistency, and delivering dependable adhesion for professional render applications.
Description
Professional-Grade Surface Preparation for External Rendering
Bostik Renderers Stabilising Primer, powered by Plasprime® Technology, is developed for the rendering professional. It primes and stabilises both porous and non-porous external surfaces, ensuring excellent adhesion and a uniform substrate for new render applications. Grey in colour for easy visibility, it also contains approximately 20% recycled material, supporting more sustainable building practices.
Key Features & Benefits
- Exceptional surface key: Promotes render adhesion on concrete, brick, block, and plaster
- Replaces scratch coats: Eliminates the need for an initial keying layer on many substrates
- Controlled application: Grey tint ensures even, visible coverage
- Ready to use: No mixing required—apply directly with brush or roller
- Sustainable formulation: Contains ~20% recycled content
Technical Specifications
- Form: Viscous liquid
- Colour: Grey
- Coverage: 2–4 m² per litre depending on substrate
- Drying Time: Typically 24 hours
- Application Temperature: Above +5 °C
- Shelf Life: 12 months in unopened packaging
Application Guidelines
- Ensure surface is dry, clean, and free of dust, oil, or loose material.
- Apply directly from the container using a soft brush or roller.
- Allow to dry fully (approx. 24 hrs) before applying render.
Product Comparison: Stabilising Primer vs Common Alternatives
| Feature / Product | Bostik Renderers Stabilising Primer | SBR Bonding Agent | PVA Bonding Agent | Traditional Scratch Coat |
|---|---|---|---|---|
| Purpose | Priming & stabilising before render | Bonding agent for difficult substrates | Bonding & sealing | Mechanical keying layer |
| Porous Surfaces | ✔ | ✔ | ✔ | ✔ |
| Non-Porous Surfaces | ✔ | ⚠ Requires mechanical key | ✘ | ✘ |
| Replaces Scratch Coat | ✔ | ✘ | ✘ | N/A |
| Ready to Use | ✔ | ✘ (dilution needed) | ✘ (dilution needed) | ✘ (site mix) |
| Coloured for Visibility | ✔ Grey | ✘ Clear/white | ✘ Clear | ✘ |
| Interior/Exterior Use | ✔ Both | ✔ Both | ✘ Mainly interior | ✔ Both |
| Adhesion Strength | ⭐⭐⭐⭐ | ⭐⭐⭐⭐ | ⭐⭐ | ⭐⭐⭐ |
| Contains Recycled Material | ✔ ~20% | ✘ | ✘ | ✘ |
Storage & Safety
- Store upright between +5 °C and +30 °C in a dry place, protected from frost and sunlight
- Secure lid tightly after use to prevent drying
- Clean tools immediately with water
- Refer to SDS for full handling precautions
Bostik Renderers Stabilising Primer simplifies exterior wall preparation—cutting labour, increasing consistency, and delivering dependable adhesion for professional render applications.
