Product description
BLACK BEAR Waterproofing Cement Additive is a powdered waterproofing admixture used in cementitious materials to reduce water permeability and absorption. It is appropriate for the surface of roofs or walls where the waterproofing properties need to be improved.
Typical Properties
Base | Tire crumb rubber |
Appearance | Gray |
Form | Fine powder |
Bulk density | 0.30 – 0.50 g/ml |
Solubility in water | Insoluble |
Features/ Benefits:
- Enhancements to the waterproof properties of mortar.
- Easy-to-use and good to use.
- Make mortar waterproofing and breathable.
- Structurally integral protection
- Extend the lifetime of exterior paint.
- Excellent bond to the concrete substrate.
Application
BLACK BEAR is ideal for use in Portland cement/sand matrix. It is suitable for the surfaces where the waterproofing properties need to be improved. For example:
- Concrete substrate: rooftops or exterior walls.
- Brick walls.
- Corner chamfers.
50kg of cement + 150kg of sand + 1 Bag (2kg) of Black Bear is sufficient to apply to an area of 4 m2 with 3cm thickness.
Dosage
For mortars: the recommended addition is 4wt% of cement. The mixing ratio of cement and sand is recommended to 1:2 or 1:3 by weight. The water content is varied based on consistency required.
Procedure
Must clean the surface and remove any dust, contaminated material, plaster, or organic waterproofing membrane before use. Cementitious adhesive should be used to increase the adhesive strength between the surface and newly waterproofing mortar. Fresh Portland cement, sand and Black Bear must be mixed firstly. Then, water in the appropriate amount is added into the dry mixture. All ingredients are blended until it reaches the right consistency. To ensure quality, please follow the instruction when preparing and do not use other chemical admixtures. It is recommended that the newly applied mortar can be kept wet with water in the first few days for curing.
Precaution
BLACK BEAR is non-toxic. Use with proper ventilation. To avoid breathing dust, please wear a dust mask, long sleeves and eye goggles during the operation. If contact with skin occurs, wash with water and soap. In the case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
Packaging & Storage
BLACK BEAR is supplied in 2KG per bag. Black Bear should be stored dry at ambient temperature. The shelf life of 12 months from date of production if stored properly in original unopened packs.
Technical Data
Time of setting
Test item | Result |
Initial set: | 3 hrs 50min. |
Final set: | 5 hrs 10min. |
Test method: CNS 3763(2009) and requirements: Initial set: not less than 1 hr, Final set: not more than 10 hrs.
Soundness
Test item | Result |
 Visual observation | No shrink, expansion
crack or warp |
CNS 3763(2009) & requirements: No shrink, expansion crack or warp
Compressive strength and ratio
Test item | Result | ||
Control group (Kgf/cm2) | 448.6 | Â
ratio |
Â
0.92 |
Test group (Kgf/cm2) | 411.4 |
CNS 3763(2009) & requirements: ≧ 0.85.
Water absorption ratio
Test item | Result | ||
1 hour | 0.20 | Â
ratio |
Â
0.22 |
5 hours | 0.20 | ||
24 hours | 0.27 |
CNS 3763(2009) & requirements: ≦ 0.50.
Permeability ratio
Test item | Result | ||
Control group (g) | 8.8 | Â
ratio |
Â
0.32 |
Test group (g) | 2.8 |
CNS 3763(2009) & requirements: ≦ 0.50.
Enhance the adhesives strength of ceramic tiles
Test item | Result |
Normal mortar | 2
8.1 kgf/cm |
Mortar with BLACK BEAR | 2
11.8 kgf/cm |
CNS 3763(2009) & requirements: ≧ 6kgf/cm2.
Cl ion in cementitious material
Test item | Result |
Mortar with BLACK BEAR | 0.0024 % |
Test method: CNS 14703(2002) & standard for green building material labe: ≦0.1%.
Water absorption rate
Test item | Result |
Normal mortar | 6.9% |
Mortar with BLACK BEAR | 1.5% |
Detector: Kett HI-520-2 Concrete and Mortar Moisture Tester
Water absorption
Water repellency effect
Waterproofing & Breathability
Important Notice:
BLACK BEAR believes the information on the data sheets is reliable and accurate as is technical advice provided by the company. SCTC makes no warranties (expressed or implied) regarding the accuracy of the information and assumes no liability regarding the handling and usage of this product. In every case we urge and recommend that purchasers before using any product in full-scale production make their own tests to determine to their own satisfaction whether the product is of acceptable quality and is suitable for their particular purpose under their own operating conditions. SCTC further disclaims any liability for consequential or incremental damages of any kind including lost profits. No agency or representative or employee of this company is authorized to change this provision.