Water Repellents for Facades, Terraces, and Showers: The Fila Guide
Quick answer: a water repellent protects facades, terraces, and outdoor surfaces from water without blocking the material, so it keeps breathing. It's the best prevention against water infiltration, mold, algae, efflorescence, and frost damage. The Fila range covers everything from a basic water repellent to a consolidating anti-infiltration treatment for cracked terraces, plus specific solutions for showers.
Prevents efflorescence in grout lines and slows aging in humid environments
From surface protection to structural repair
Simple water repellent (Hydrorep, HYDROREP): repels surface water, protects against mold and frost.
Consolidating water repellent (Concrete Hydro, Salvaterrazza): in addition to repelling water, it compacts the material and prevents it from crumbling (surface dusting), ideal if the substrate is already somewhat deteriorated.
Pre-grouting (PRW200): applied before the installation stage, not after.
Before applying a water repellent
The surface must be clean and completely dry. If there's construction dirt, remove it first (see the construction site cleaning guide).
If there's residue from a previously misapplied waterproofing product, strip it first with Fasezero.
Apply the water repellent with a brush, roller, or sprayer, avoiding pooling and direct sunlight.
Let it dry for the recommended time before exposing the surface to rain.
Frequently asked questions
Does a water repellent make the surface 100% waterproof?
It repels rainwater and surface moisture, but it doesn't replace structural waterproofing on roofs with serious infiltration problems; in that case, a consolidating treatment like Salvaterrazza is a better fit.
Can a water repellent be applied over a wall with mold?
Not over active mold: it must first be removed with a specific product, and then the water repellent applied as prevention. See the anti-mold and anti-algae guide.
How often does a facade's water-repellent treatment need to be renewed?
It depends on orientation and exposure, but as a general reference it's usually checked every few years, verifying whether water still beads on the surface.
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