Hydro Shield

Dubond’s Hydro Shield is a solvent free silicone micro emulsion silicon and siloxanes. The ready to use, aqueous solution of Hydro shield serves as a high quality, general purpose water repellent for impregnating and priming mineral and even alkaline substrates.
Areas of Application:

Hydro shield is recommended for a “Hydrophobisation” (water repellency) of facades. It is used as a general purpose water repellent for absorbent, mineral and even alkaline substrates, such as natural stone, brick concrete and sand lime brick, as well as for mineral paints and stuccos. HYDRO SHIELD is also suitable as a primer for dispersion based paints and stuccos, silicone resin paints and stuccos, concrete coatings, and as a water repellent for the in-plant treatment of lightweight aggregates and clay building materials, aerated concrete, sand-lime brick, fiber reinforced concrete and mineral fiber materials.
Damage to facade is always due to moisture, rain and surface water. Salt water damage occurs in porous building materials, only when moisture is present.
The sources of salivation are deicing salts, rising dampness and reaction between the binder used in facade materials and paints. In addition to that, building materials have an inherent salt content. The moisture transports this salts to the surface of the substrate where it crystallization out. Salts are not only deposits on the surface but it cause the hydration and crystallization pressure. This builts up finally led to embrittlement and crumbling away of the surface. Acid rain i.e. sulphuric acid is by product in the form of sulphur dioxide by burning of industrial fuels, bound to particle of dust and droplets of water, is the primary cause for corrosion. Sulphuric acid reacts with the carbonates, the binder in mortars, lime washes, concrete, stones etc. Attack by moss and micro-organisms such as fungi and algae which are consequence of protected wetting of facade surfaces. The above mentioned facade damages can be diminished by impregnation with water repellant agents. The main aim of this is to form “hydrophobic” or dry zone on surface. The dry zone are not ideal for biotopes mosses, fungi, algae. The silicon molecules of Hydro shield do not clog the pores and so the surface retains its permeability to water vapour and “breathes”. Therefore treated buildings do not suffer from condensation damage. Buildings treated with Hydro shield may absorb very little water and can release it again readily in dryer conditions.

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