Why use a water-repellent agent? With the right stone impregnation product, you can waterproof your stone and make your facade long-lasting. This page explains which products work (water-based or solvent-based silane/siloxane), how to apply them, and what to consider for a lasting result. ✓ Protection against driving rain, frost damage,...
Waterproofing agent & impregnating agent – protect your facade
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BRB International BVWater-repellent silicone emulsion 50
€31,58€26,10
Water-repellent silicone emulsion 50 is a water-thinnable, solventless silane / siloxane emulsion concentrate. Application Dilute solutions of Water-repellent silicone emulsion 50 are recommended for: Masonry water repellents Ideal for many porous mineral and alkaline surfaces, such as bricks, tiles, limestone,...
Why use a water-repellent agent?
With the right stone impregnation product, you can waterproof your stone and make your facade long-lasting. This page explains which products work (water-based or solvent-based silane/siloxane), how to apply them, and what to consider for a lasting result.
- ✓ Protection against driving rain, frost damage, lime efflorescence and contamination
- ✓ Vapor permeable: allows moisture to escape from the wall, but repels water
- ✓ Invisible: colorless, retains the original appearance
- ✓ Durable: years of effectiveness with proper preparation and application
SEO note: Many people also search for “water repellent” – the same solution is referred to as water repellent .
Selecting a hydrophobic agent (silane/siloxane)
Silane/Siloxane (Facade)
- Deep penetration, reacts in capillaries (hydrophobic effect)
- Suitable for brick, concrete, sand-lime brick and natural stone*
- Available in water-based and solvent-based
Silicone Emulsion (PDMS)
- Oil-in-water (O/W) emulsion, water-dilutable and easy to use
- Forms a water-repellent film; ideal for maintenance and textiles
- Can be used as a top coat/maintenance after silane/siloxane
*Note: Always test on a sample surface when using natural stone ; some types of stone may discolour or shine differently.
Self-Waterproofing: Step-by-step plan
- Inspection & Cleaning – Remove algae, salt efflorescence, grease, and loose particles. Let the wall dry completely.
- Masking – Cover windows, frames, metal and plants.
- Test area – Always test 0.5–1 m² first for absorption and appearance.
- Application – Apply wet-on-wet with low pressure (spraying) or rolling. Work from bottom to top.
- Post-treatment – Remove excess material from hard parts immediately; allow to harden according to the data sheet.
Do's
- Dry, clean surface (RH < 80%, no rain expected)
- Temperature 5–25°C, no full sun or frost
- Sufficient material consumption (saturation is key)
Don'ts
- Facades with moisture problems without addressing the cause
- Spraying on paintwork, glass or metal (may cause stains)
- Respraying vapor-tight paint/systems (risk of blistering)
Surfaces: brick, concrete and natural stone
- → Brick & mortar: standard choice: silane/siloxane (deep penetration)
- → Concrete: choose silane (low molecular weight) for better penetration
- → Natural stone: first test area (sensitive to color deepening)
Frequently asked questions about impregnating your own wall
Which product is the best waterproofing agent for my facade?
For mineral surfaces, silane/siloxane impregnators offer the most durable performance. If you're working on textiles or need maintenance/coating, a silicone emulsion is suitable.
How long does a stone impregnation agent remain effective?
Depending on the substrate, weather conditions, and product: typically several years. Proper cleaning and saturation extend the lifespan.
Is there a chance of discoloration?
Colorless products are designed to preserve appearance. Always test a sample area; natural stone can show nuances.
Can I do this waterproofing myself or is it better to call in a professional?
With a good step-by-step plan and the right tools, you can tackle many projects yourself. Large or vulnerable facades? Consider hiring a professional.
What do people mean by "waterproofing agent"?
That's a common misspelling for waterproofing agent. It refers to the same product.
Advice & order - impregnate your wall yourself
Ready to get started? Choose your stone impregnation product (silane/siloxane or silicone emulsion) and follow our step-by-step plan for waterproofing your own stone. If you have any questions, please contact us for product selection, usage, and application tips.