Description
Sika® Reactivation Primer – Roof & Balcony Membrane Recoat Primer
Restore adhesion and safely recoat existing Sika liquid waterproofing systems.
Sika® Reactivation Primer is a high-performance, one-component polyurethane primer designed to reactivate existing Sika liquid applied roofing membranes and balcony waterproofing systems. It enables strong intercoat adhesion when the standard recoating window has been exceeded, allowing additional layers to be applied with confidence.
Ideal for maintenance, refurbishment, and repair projects, this easy-to-use primer ensures continued system performance without the need for full removal.
Key Features & Benefits
- One-Component Formula – Ready to use straight from the tin, no mixing required
- Restores Intercoat Adhesion – Ensures new layers bond effectively to existing membranes
- Extends Recoating Window – Apply further coats even after standard overcoating times have passed
- Fast Drying – Typically ready for overcoating in 3–4 hours (at 20°C)
- Versatile Compatibility – Suitable for a wide range of polyurethane roofing systems (subject to testing)
- Ideal for Refurbishment – Avoid costly strip-outs and extend system lifespan
Typical Applications
- Recoating Sika Liquid Applied Roofing Membranes
- Refurbishment of balcony waterproofing systems
- Maintenance of existing polyurethane roof coatings
- Preparing aged membranes for additional protective layers
Why Use a Reactivation Primer?
When the original recoating window of a liquid waterproofing system is exceeded, adhesion between layers can be compromised. Sika® Reactivation Primer chemically prepares the surface, ensuring new coatings bond securely—helping maintain waterproof integrity and long-term durability.
Product Information
- Packaging: 5L metal container (~5.15kg)
- Colour: Clear, low viscosity liquid
- Chemical Base: Solvent-borne polyurethane
- Density: ~1.03 kg/l (at 23°C)
- Shelf Life: 12 months from production
Application Guidelines
- Application Temperature: +5°C to +30°C
- Humidity: Max. 85% RH
-
Overcoating Time:
- ~3–4 hours at 20°C
- ~5–6 hours at 5°C
- Must be overcoated within 48 hours
- Ensure substrate is at least 3°C above dew point to prevent condensation
Once opened, use promptly—partial storage may affect performance.
Compatibility
Suitable for use with:
- Sika Liquid Applied Roofing Systems
- Sika Balcony Waterproofing Systems
- Existing polyurethane membranes (subject to adhesion testing)
Why Buy from Clever Shield?
- Specialist supplier of professional waterproofing systems
- Expert technical advice for refurbishment and roofing projects
- Fast UK delivery
- Competitive pricing on the full Sika range
Need Technical Advice?
Not sure if your existing system is suitable for recoating? Our team can help you specify the correct preparation and products.
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