SBR Waterproofing Chemical In Patna

SBR waterproofing chemicals refer to Styrene-Butadiene Rubber (SBR) latex-based compounds used primarily to improve waterproofing, adhesion, flexibility, and durability of cementitious systems. These chemicals are commonly used in construction for both repair and new build waterproofing applications.

What is SBR (Styrene Butadiene Rubber)?

SBR is a synthetic rubber derived from the co-polymerization of styrene and butadiene. It is typically sold as a milky-white liquid latex and is mixed with cement, sand, or other mortars to create waterproof slurries and coatings.

 Key Properties of SBR Waterproofing Chemicals:

Property Details

Form Liquid latex (usually white or off-white)

pH Typically between 9 – 10

Solids content ~ 45%–50%

Compatibility Cement, sand, concrete, and masonry

Setting time Depends on temperature and mix, generally 2–6 hours initial set

Curing Moist curing is recommended

 Typical Applications:

Waterproofing of basements, terraces, and bathrooms

Bonding agent between old and new concrete

Repair mortars for spalled concrete

Cementitious floor screeds and toppings

Water-retaining structures like tanks and reservoirs

Tiling substrates in wet areas

 Mix Ratio Examples (Common SBR Usage):

Application Cement Sand SBR Water

Slurry coat for waterproofing 1 - 0.2–0.25 (of cement wt.) Enough for brushing consistency

Waterproof plaster 1 3 0.1 (of cement wt.) As needed

Repair mortar 1 2–3 0.1–0.2 (of cement wt.) As needed

 Application Method:

Surface Preparation: Clean the surface thoroughly; remove dust, oil, laitance, or loose materials.

Priming: Sometimes a diluted SBR solution (1:1 with water) is used as a primer.

Mixing: Combine SBR with water first, then add cement/sand gradually.

Application: Brush, trowel, or roll depending on the mix and surface.

Curing: Protect against rapid drying. Cure for 5–7 days for best performance.

 Advantages of SBR Waterproofing Chemicals:

Excellent adhesion to most construction materials

Improved water resistance and chemical resistance

Enhances flexibility of cementitious layers

Reduces shrinkage and cracking

Resists alkalis, making it ideal for concrete and plaster

UV stable to some extent (depending on formulation)

 Limitations:

Not suitable for permanently submerged applications unless specially formulated.

Must be protected from rapid drying.

Not a standalone waterproofing solution – always mixed with cementitious material.