Pak SBR LaTeX

 

Description-Pak SBR LaTeX

Pak SBR LaTeX is based on modified styrene butadiene latex supplied as a ready to use
bonding agent in liquid consistency. It is used for repair of spalled concrete – floors, columns,
beams, chhajas, slabs & waterproofing of toilets & bathrooms, small terraces etc. as it bonds
strongly to old & new concrete and to plasters. Pak SBR LaTeX reduces shrinkage, prevents cracking, dust
pick up & amp; improves abrasion resistance.

Standard Compliance / specification

Meets the requirements of BS 6319 part 2:1983 & ASTM C 190-85 standards

Typical Applications-Pak SBR LaTeX

• For concrete repairs – Spalled concrete of floors, columns, beams, chajja, slabs, parapets, etc.
• For waterproofing – Small roof terraces, sunken portions of toilets & bathrooms, chajja & lift
pits, balconies.
• As a bond coat – For bonding of new concrete to old concrete, masonry stone work,
plastering.
• For cladding – Fixing or re-fixing of slip bricks, tiles, stones & marble bedding.
• As external rendering – Weatherproof & frost resistant render.
• As bonding slurry coat for pinhole treatment on concrete surface.
Features
• Multipurpose – It is multipurpose & economical product, easy to use.

• Cracking – It prevents cracking by improving flexural strength.
• Hardness – Improves the hardness & prevents dust generation.
• Shrinkage – Reduces drying & aging shrinkage cracks.
• Bonding – Bonds strongly to concrete, masonry, stonework, plasters, cementitious surfaces.
• Erosion & corrosion – Improves erosion resistance & prevents corrosion.
• Abrasion resistance – Improves abrasion resistance of the cement mix.
• Grouting – Reduces viscosity of cement injection grout for better fluidity & bonding.Pak SBR LaTeX
Packaging
0.2 kg, 0.5 kg, 1 kg, 5 kg, 10 kg, 20 kg & 50 kg

Method of Application-Pak SBR LaTeX

1 SURFACE PREPARATION
• Clean the surface with wire brush or scrubber to remove hidden dirt, loose particles, laitance &
dust. Degrease the surface by using suitable solvents.
• Repair the spalled concrete portion by saw, cutting the extreme edges of the repair location to
a depth of at least 10 mm to avoid featheredging & to provide strong bond.
• Clean the concrete surface to remove any contamination where breaking is not possible.
Roughen the surface by light scrabbling or grit blasting.
• For priming of concrete substrate, the surface should be thoroughly saturated with potable
water. Remove any excess of water prior to application.
2 WATERPROOFING COATING
• For a waterproofing coating Mix Pak SBR LaTeX : Cement in the ratio 1:1.5 by volume.

• Mix for 2-3 minutes to avoid air entrapment. Keep on slowly adding cement to Pak SBR LaTeX
until the required consistency is achieved.
• Brush apply 2 coats of the mix in a span of 4-6 hours on the prepared concrete substrate.
• Overlay the coating with a protective screed to the desired slope & thickness.
3 BONDING PRIMER
• For a bonding primer coat of Pak SBR LaTeX mix : Cement in the ratio 1:1 by volume.
• Brush apply 1 continuous coat of the mix on the prepared concrete substrate.
• Ensure to overlay the repair mortar when the bond coat is still tacky.
4 REPAIR MORTARS & RENDERS
• A suitable mix ratio for patching repair mortar or render is as follows:
• Mix design – Portland Cement: 50 kg, Washed sand: 150 kg, Pak SBR LaTeX: 6-7.5 kg &
Water: 10 Lit
5 FLOOR SCREEDS  PCC
A suitable mix ratio for patching repair mortar or render is as follows:
• Mix design – Portland Cement: 50 kg, Washed sand: 75 kg, 6 mm downsize aggregates: 75 kg,
Pak SBR LaTeX: 6-7.5 kg & Water: 10 Lit
6 MIXING & APPLICATION
• A forced action mixer is essential (PAN Mixer) & recommended to ensure that Pak SBR LaTeX
mortar is thoroughly mixed. Use a suitable sized drum with heavy-duty electrical drill machine
fitted with spiral paddle mixer at slow speed of 400-500 rpm.
• Hand mixing is permissible only for 25 kg or less quantity.
• Charge the mixer with required quantity of clean & dry sand(or coarse aggregates as needed),
cement & mix for 1-2 minutes, then add the recommended dosage of Pak SBR LaTeX

dispensed in water which is pre-batched. Mix for 2-3 minutes to avoid air entrapment. Keep on
slowly adding water until the required consistency is achieved.

Mix Design Using Pak SBR LaTeX
Wide range of mix designs are recommended for different application using Pak SBR LaTeX
Application Composition Quantity of Pak SBR LaTeX 

Consistency &
thickness

Patching & repair
mortar

OPC – 50 kg
Washed sand: 150 kg
Water: 10 Lit

6 -7.5 kg Mortar consistency,
5-25 mm thickness

PCC/Floor Screed OPC – 50 kg
Graded & washed
sand – 75 kg
Coarse aggregates
(6mm down size) –
75 kg Water – 10 Lit

6 – 7.5 kg Mortar consistency,
10-40 mm thickness

Waterproofing
coating

OPC – 50 kg 20 – 22 kg Brushable
consistency

4 Slurry for pin hole
treatment & grouting

OPC – 50 kg Water –
5 Lit

5 kg Slurry consistency

Technical Information
PROPERTIES RESULTS
Nature Milky white, translucent,
free flowing liquid

Type SBR Latex- (Styrene Butadine

Rubber latex)

Total solids % by mass @ 1050C 38 + 1
pH value 7.7
Sp. gravity at 27.50C 1.01
Coverage (URP:Cement in 1:1.5 ratio) in 2
coats, as a waterproofing slurry coat

2 -2.2 m2
for the mix of 1 part of
URP and 1.5 part of cement

Dosage
• As a waterproofing coating – Mix proportion by volume 1:1.5 (Pak SBR LaTeX: Cement).
• As a mortar modifier – 10-15 % of Pak SBR LaTeX by weight of cement.
• As a bonding agent – Mix proportion by volume; 1:1 (Pak SBR LaTeX: Cement).

Coverage-Pak SBR LaTeX 

• As a waterproofing coating – 2 – 2.2 m2/kg in 2 coats.
• As a mortar modifier – 6-7.5 kg of Pak SBR LaTeX per 50 kg of cement.
• As a bonding agent – 4.2 – 4.5 m2/kg per coat.
Precautions & Limitations
• Recommended dosage to be followed to achieve desired results.
• When working in hot temperature conditions, extra water may be added to the repair mortar to
compensate for the evaporation loss & make the mortar workable.
Shelf Life

• Best before one and half years from the date manufacture when in sealed pack and stored
under proper condition.
• Store in a cool & dry place in unopened condition away from direct sunlight.
Health & Safety Precautions
• Cementitious mortars & slurries modified with Pak SBR LaTeX when mixed or when become
damp, may release alkali which can be harmful to skin & eye.
• Wear suitable protective clothing, gloves, eye protection and respiratory protective equipment
during application.Pak SBR LaTeX 
• In case of contact with skin, rinse with plenty of clean water and then cleanse with soap water.
• In case of contact with eyes, rinse immediately with plenty of clean water and seek medical
advice.