CONCRETE RUBBER (SBR)
SEA STAR CONCRETE RUBBER 4815 is a ready for use aqueous dispersion of a Styrene-Butadiene copolymer with high stability against electrolytes. It contains an anionic/nonionic emulsifier system and is free from film forming aids, solvents, plasticizers and ammonia.
SEA STAR CONCRETE RUBBER 4815 is used in floor, screeds, leveling compounds, adhesive – bonded joints, sealers / primers, repair mortars for concrete restoration, cement – based anti corrosion paints, gypsum –based stoppers / fillers, and building adhesives. Owing to the limited UV-stability of styrene – butadiene copolymers surface chalking can occur. This behaviour is identical with unmodified mortars. Addition of 10 – 50 % by weight of SEA STAR CONCRETE RUBBER 4815 – related to the cement content – is recommended for the improvement of mortars.
SEA STAR CONCRETE RUBBER 4815 is used in combination with cement, lime gypsum, etc. Addition of SEA STAR CONCRETE RUBBER 4815 improves workability, wet adhesion and plasticity of fresh mortars.
The dispersion has no corrosion promoting action on steel reinforcements and is film forming above + 3 °C. Additions of film forming agents or plasticizers are therefore not required.
The dispersion has a strongly liquefying effect and reduces the water requirement at the same mortar consistency. SEA STAR CONCRETE RUBBER 4815 improves following end properties, flexural strength (up to 50 %), adhesive strength, abrasion / water / chemical / freeze / thaw resistance and shrink /swell behavior. SEA STAR CONCRETE RUBBER 4815 has extremely good resistance to saponification, by which long term stability in the strongly alkaline region even under moist conditions is secured.
SEA STAR CONCRETE RUBBER 4815 is preserved against bacterial and fungal attack. In the manufacture of finished products, the material has to be retreated, as usual, with suitable biocides to give enhanced preservation.
On available data SEA STAR CONCRETE RUBBER 4815 has no hazard classification according to 88/379 EEC. The surfactants and to a lesser extent the free monomer present in polymer dispersions can cause dermatitis through repeated contact in sensitive individuals. Eye contact may cause irritation.
Chemical Nature: Aqueous dispersion of a copolymer of styrene and 1,3 butadiene Isononylphenol ,ethoxylated >=1%
7.0- 9.0 (20 C)
100 C Water
No flash point
1.010 – 1.040g/cm3
Conditions to avoid
Direct sunlight and freezing
Solid content, %
Glass Transition Temperature, °C
Mean Particle Size, μm
Minimum Film-Forming Temperature, °C
Tensile Strength, N/mm²
Elongation at break, %
SEA STAR CONCRETE RUBBER 4815 has to be stored protected from frost and, as far as possible, below 40°C. Storage at temperatures between + 5 and + 30 °C is recommendable. SEA STAR CONCRETE RUBBER 4815 contains a preservative to counter microbial attack during transportation. Care must be taken to ensure that storage containers are tightly closed. When stored correctly SEA STAR CONCRETE RUBBER 4815 has a storage life of 12 months from date of delivery.
This product contains Portland cement which is slightly alkaline when wet. For people with sensitive skin, continuous use may cause irritation. Gloves or a suitable barrier cream should be used. As a general Code of safety practice all chemical products should be treated with care, kept away from children and animals, especially protect eyes and skin. In emergency seek medical advice.
EXPOSURE CONTROL AND PERSONAL PROTECTION
Wash with water removed contaminated clothing.
Wash with large amount of water. Seek medical attention if irritation persists.
Give plenty of water to drink and obtain medical advice.
Masks when spraying
Gloves if risk of skin contact
Goggles if risk of splashing
Standard industrial overalls if splashing.