DUBOND’S HYDROSHIELD S is a silicone concentrate that is based on silane/siloxane. It is colorless, hence maintains natural color of the substrate. Dilute solutions of HYDROSHIELD S in organic solvents serve as high-quality general purpose water repellents for impregnating and priming mineral and highly alkaline substrates. After application, HYDROSHIELD S reacts with the atmospheric moisture or pure water in the substrate, there by generating the active ingredient and liberating acetate. The active ingredient greatly lowers the water absorbency of the substrate. Since neither pores nor capillaries are clogged, the substrate retains a Solvent Based Oligomeric Siloxane Water Repellent Product 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
Areas of Application
Visible cracks must be sealed by Du Flex PS 600, polysulphide, or polyurethane sealant and primer. This sealants are not attacked by the repellent Hydro shield. Brush application is the simplest method Flat brushes or rollers can be used for application, while solution is applied, as the success or failure of such treatment depends on this factor. Surface penetration is most important step before application to get best results and avoid failure The surface must be free from any loose materials, crumbling powdery encrusted walls, fungus, moss, oil, grease and mould release agents. Clean the surface using scrappers and wire brushes Then clean the walls with high pressure water, wait for 2 days for the surface to dry The walls must be dry before the application Use of acidic and alkaline chemicals, detergents, cationic surfactants should be avoided It is advisable to wait for 28 days for curing the fresh masonary / new concrete.
Precautions & Limitations
HYDRO SHIELD S is also suitable as primer for exterior paints. It is NOT suitable for rendering gypsum water repellent.
Packing and Coverage
2 HYDRO SHIELD S covers approx. 3 to 4 M / liter. Minimum 2 coats are recommended (Depends on the porosity of substrate.
Shelf Life & Storage
HYDRO SHIELD S has a shelf life of at least 12 months, if stores in tightly closed original containers between 0°C and 30°C the containers must be protected against direct sunlight. The “Best use before end” date of each lot is shown on the product label.
Health & Safety
HYDRO SHIELD S is a non-toxic and non-flammable. Avoid contact with skin and eyes, Incase of contact with eyes or skin, wash thoroughly with plenty of water and contact doctor.
|Viscosity of flow cup B4 at 30deg c, seconds||13 ± 5|
|Specific gravity, at 30deg c gm/cc||1.3 ± 0.02|
|pH||value 12 - 14|
|Density at 25°C, approx. (g/cm³)||1.05|
|Viscosity at 25°C approx. (mm²/s)||20|
|Flash point, approx.||38°C|
|Dilution ratio||Ready to use|
|Intercoat period||Immediate wet on wet|
|Breathing efficiency||Min 70 %|
|UV resistance & weather durability||Excellent|
|Packaging Details||1ltr, 5 ltr, 10 ltr, & 20 ltr container|