KingAdd 77WP®
Powder waterproofing admixture.
SpecWorld has the Spec Pack, CSI specification and drawings for registered specifiers.
Overview
KingAdd 77WP is powder waterproofing admixture formulated from selected organic salts specially designed to reduce the permeability in all cement based mortars, screeds and concrete. KingAdd 77WP blocks the natural pores in the mix and imparts the hydrophobic properties which reduce moisture permeability.
Where to use
KingAdd 77WP is a waterproofing admixture for use in all cement based mortars, screeds and concrete.
Why use it
- Improves durability by minimizing penetration of moisture and water based chemicals.
- No additional water into dry or semi-dry mixes.
- Reduces efforescence and pigment leaching from cement mortars.
- Chloride free.
COMPATIBILITY
KingAdd 77WP can be used with all types of Portland cement and cement replacement materials. KingAdd 77WP is compatible with other KINGKRETE admixtures used in the same concrete mix. If more than one type of admixture is to be used in concrete mix, they must be dispensed to the concrete separately.
Technical properties
Values @ 25°C
| Colour | White |
|---|---|
| Chloride contentBS 5075 | Nil |
EFFECTS OF OVER DOSAGE
KingAdd 77WP over dosage will increase air entrainment which may cause a reduction in the compressive strength.
POINTS TO BE CONSIDERED IN WATERPROOF CONCRETE
- Lower water to cement ratio gives lower permeability concrete.
- Good concrete placing and compaction are very important to produce waterproof concrete.
- Fresh concrete should be protected against rapid drying and cured properly.
- Cold joints must be avoided.
How to use
Method of use
KingAdd 77WP should be added to the mix at the same time as the cement, sand and other aggregates. Do not pre-dissolve in the mixing water.
DOSAGE
The guidance dosage of KingAdd 77WP is 1 kg/50 kg of cementitious materials in the mix, including GGBFS, PFA or microsilica.
Representative trials should be conducted to determine the optimum dosage of KingAdd 77WP to meet the performance requirements by using the materials and conditions on actual use.
Cleaning
KingAdd 77WP can be removed immediately by brush. If the spillage is mixed with water, attention should be taken not to leave slippery film.
Coverage, packaging and storage
Packaging
KingAdd 77WP is available in 1 kg bags.
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.