KingCoat WR®
Water repellent impregnation based on water borne Silane/Siloxane.
SpecWorld has the Spec Pack, CSI specification and drawings for registered specifiers.
Overview
KingCoat WR is a water based, ready for use, single component, water repellent impregnation for application on vertical or steeply sloping concrete, mineral-based natural and artificial stone, cementitious substrates, mineral plasters and mineral paints.
Where to use
KingCoat WR provides excellent water repellency and protection from weathering to vertical or steeply sloping concrete, mineral-based and artificial stone, cementitious substrates and mineral paints.
KingCoat WR can also be used for injection into walls to prevent rising damp.
KingCoat WR can be used as moisture barrier primer that is recoatable with water and solvent borne paints.
Why use it
- Good penetration into substrate.
- Good reduction of water and chloride intrusion.
- Excellent resistance to alkalis and UV light.
- Increases freeze thaw resistance.
- Minimizes efflorescence.
- Breathable, allows for water vapour release.
- Very good resistance to dust and dirt pick-up.
Technical properties
Values @ 25°C
| Specific gravity: | 1.00 ± 0.02 | |
|---|---|---|
| Viscosity (Brookfield, N₁S₂₀) | < 5 cP | |
| Rapid chloride permeabilityASTM C1202 | Medium | |
| ISATBS 1881, Part 208:1996 (replacesBS 1881, Part 5:1970) | < 0.1 ml/m²/sec, after 60 | |
| VOCASTM D2369 | < 10 g/ltr | |
| Performance characteristics | EN 1504-2 requirement | Measured value |
| Depth of penetrationEN 1504-2, Table 3 | Class I<10mm Class II≥10mm | ≤ 4 mm (Class I) |
| Drying rate coefficientEN 13579 | Class I > 30% Class II >10% | ≥ 75% (Class I) |
| Water absorptionEN 13580 | <7.5% compared to control untreated sample | ≤4% (Pass) |
| Resistance to alkaliEN 13580 | < 10% | ≤ 9.3% (Pass) |
Standards and approvals
KingCoat WR complies with the requirements of EN 1504-2 Surface Protection Systems for Hydrophobic Impregnation (H) Principles 1.1, 2.1 and 8.1.
How to use
Surface preparation
Surface must be clean, sound and free from oil, grease, curing compound, or any contamination. Any contaminants should be removed by light grit blasting. Water jets is then used as the end step of substrate cleaning.
Note: Avoid the use of acidic or alkaline chemical detergents and cationic surfactants. If detergents are used for cleaning, it is necessary to rinse well the cleaned surface by water in order to remove any detergent residue.
Application
It is recommended to apply two consecutive coats of KingCoat WR at the stated rate of application, or one flood coat.
Impregnation can be carried out using airless spray machine, brush, or roller.
Curing
The water repellent properties fully develop in approximately 72 hours @ 25°C.
Cleaning
Tools and equipment can be cleaned with water when wet.
Limitations and notes
KingCoat WR should not be applied when rain is forecasted within 24 hours. Wait at least 24 hours after rain or water cleaning.
Be sure that impregnated surfaces by KingCoat WR are not exposed to water and rain for at least 12 hours after application.
DO NOT USE DETERGENTS for cleaning impregnated surfaces by KingCoat WR, washing occurs only by water.
Coverage, packaging and storage
Coverage
0.1 - 0.4 litre/m² depends on the porosity of the substrate.
Packaging
KingCoat WR is available in 20 litre pails and 200 litre drums.
Storage
Shelf life is 1 year when stored under cover, out of direct sunlight and protected from extremes of temperature. Failure to comply with the recommended storage conditions may result in premature deterioration of the product or packaging. For specific storage advice consult KingKrete's Technical Services Department.
Health and safety
As with all chemical products, care should be taken during use and storage to avoid contact with eyes, mouth, skin and foodstuffs. Treat splashes to eyes and skin immediately. If accidentally ingested, seek medical attention. Reseal containers after use. Use in well ventilated areas and avoid inhalation.