KingCoat K®
Water repellent impregnation based on water borne silicone.
SpecWorld has the Spec Pack, CSI specification and drawings for registered specifiers.
Overview
KingCoat K is a transparent, ready for use, single component, water based silicone used to impart water repellency for mineral construction materials.
Where to use
- KingCoat K provides outstanding early water repellency and protection from weathering to natural stones, clays, terracotta, bricks, sandstone, limestone, aerated concrete, insulating materials, gypsum and gypsum-based fiber boards.
- KingCoat K is also suitable to be applied immediately on manufactured low-fired clay products such as roof tiles, floor tiles, and flower pots.
Why use it
- Good penetration into substrate.
- Provides excellent water repellency to a wide variety of substrates.
- Excellent reduction of water intrusion.
- Excellent resistance to UV light.
- Increases considerably freeze thaw resistance.
- Minimizes efflorescence.
- Breathable, allows for water vapour release.
- Very good resistance to dust and dirt pick-up.
Technical properties
| Appearance | Clear |
|---|---|
| Specific gravity | 1.01 ± 0.005 |
| Water absorption resistance compared to untreated stone sample:*ASTM C642, 24 hr immersion | > 300% improvement in water resistance |
| UV resistanceASTM C1315 | No yellowing or deterioration |
| Depth of penetration in stone:* EN1504-2 | 3.5 mm |
| VOC | < 10 g/ltr |
*Results may differ depending on type of stone and its porosity.
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.
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 jet is then used as the end step of substrate cleaning.
Application
It is recommended to apply two consecutive coats of KingCoat K at the stated rate of application with a maximum recoat time of 10 minutes, 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 24 hours @ 25°C.
Cleaning
Tools and equipment can be cleaned with water when wet.
Limitations and notes
Limitations
- KingCoat K is not suitable for polished and glazed surfaces.
- KingCoat K can cause a white deposit on the surface of colored construction materials.
- KingCoat K cannot be applied on surfaces previously treated with water repellent materials.
- KingCoat K is not recommended for application on new and reinforced concrete.
Notes
- KingCoat K should not be applied on glass, wood, plastic, aluminum and metals. Rinse immediately with water in case of accidental exposure.
- KingCoat K 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 K are not exposed to water and rain for at least 8 hours after application. Allow the treated surface to dry for at least 24 hours to develop maximum water repellency.
- DO NOT USE DETERGENTS for cleaning impregnated surfaces by KingCoat K, washing occurs only by water.
Coverage, packaging and storage
Coverage
0.1 - 0.4 litre per m² depends on the porosity of the substrate.
Packaging
KingCoat K is available in 20 litre plastic pails and 200 litre plastic 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.