Construction Materials Product Data Sheet

Vetobond PB434
Polymeric bonding agent,
waterproof mix enhancer & primer

Uses
uu Production of high strength waterproof renders,
screeds, cement slurries and mortars.
uu Enhancing cementitious mixes such as plasters,
tile adhesives, screeds,...etc.
uu As a primer and surface sealer for plasters and
repair mortars.
uu Enhancement of cementitious mixes to freeze
and thaw cycles.
Product Description
Vetobond PB434 is a modified styrene butadiene rubber emulsion which is supplied as a ready to use white liquid. It
is designed to improve the quality of site-batched cementitious mortars and slurries. When used as a primer; it works
to seal the substrate and enhance bond to mortars and plasters. Being resistant to hydrolysis, it is ideal for internal and
external applications in conjunction with cement.

Advantages Technical Data

uu Factory controlled single component easy to Vetobond PB434 Typical Values
use and easily gaged. Appearance Milky liquid

Technical Data Sheet -Vetobond PB434

uu Water emulsified, environment friendly product. Density @ 25ºC 1 kg/Ltr approx.
uu Odorless and non flammable. Drying Time @ 25ºC 1 - 2 hours
Chloride content Nil
uu Resistant to hydrolysis, used externally and Mix Enhancement Result Control
internally. Compressive Strength
35 N/mm2 28 N/mm2
uu Improves mortars to provide waterproof BS6319
repairs, renders and toppings which are highly Tensile Strength
3.5 N/mm2 2.5 N/mm2
resistant to freeze/thaw cycling EN13286
uu Improved tensile and flexural properties Flexural Strength
9 N/mm2 8 N/mm2
allowing thin applications. BS6319
Slant Shear Bond
uu Excellent bond to concrete, masonry, 20 N/mm2 2.5 N/mm2
BS6319
stonework, plaster and block walls.
uu Chloride free. Usage Instructions
Surface Preparation
Saw cut the extremities of the repair locations to a
depth of at least 10 mm to avoid feather edging and to
provide a square edge. Break out the complete repair
area to a minimum depth of 6 mm up to the sawn edge.
Clean the surface and remove any dust, unsound
or contaminated material, plaster, oil, paint, grease,
corrosion deposits or algae. Where breaking out is not
required, roughen the surface and remove any laitence
by light scabbling or grit blasting.
 Construction Materials Product Data Sheet

Oil and grease deposits should be removed by steam 1. Patching and repair mortar (Recommenced
cleaning, detergent scrubbing or the use of a proprietary thickness 6 mm to 40 mm)
degreaser. The effectiveness of decontamination 50 kgs Ordinary Portland Cement
should then be assessed by a pull-off test. 150 kgs grade C/M sharp sand
Expose fully any corroded steel in the repair area 10 liters Vetobond PB434
and remove all loose scale and corrosion deposits. 8 liters (approximately) clean water
Steel should be cleaned to a bright condition paying
particular attention to the back of exposed steel bars.
2. Heavy-duty floor screed (Recommended thickness
Grit blasting is recommended for this process.
10 mm to 40 mm)
Where corrosion has occurred due to the presence of 50 kgs Ordinary Portland Cement
chlorides, the steel should be high-pressure washed 75 kgs 3 mm to 6 mm granite chips
with clean water immediately after grit blasting to 75 kgs grade C/M sharp sand
remove corrosion products from pits and imperfections 10 liters Vetobond PB434
within its surface. 6 liters (approximately) clean water
Substrate Priming The screed should be of a semi-dry cohesive
consistency.
The substrate should be thoroughly soaked with clean
water and any excess removed prior to commencement.
A slurry primer should be prepared consisting of 1 3. Render (Recommended thickness 6 mm to 9 mm)
volume Vetobond PB434 to 1 volume clean water to 3
50 kgs Ordinary Portland Cement
volume fresh cement. To obtain a smooth consistency,
150 kgs grade C/M sharp sand
the cement should be blended slowly into the premixed
10 liters Vetobond PB434
liquids. The slurry primer should be stirred frequently
6 liters (approximately) clean water
during use to offset settlement.
The render should be of a semi-dry cohesive
The slurry primer should be scrubbed well into the
consistency.
surface of the concrete. Avoid applying too thickly and
avoid ‘puddling’.
The repair mortar, topping or render must be applied 4. Bonding mortar for slip bricks, tiles, etc:
on to the wet slurry primer. If the slurry primer dries 50 kgs Ordinary Portland Cement
before application of the mortar, it must be removed 125 kgs grade C/M sharp sand
Technical Data Sheet -Vetobond PB434

and the area reprimed before continuing. 10 liters Vetobond PB434

7 liters (approximately) clean water
In exceptional circumstances, e.g. where a substrate/
repair barrier is required or where the substrate is likely Water is adjusted to give a firm mortar. For fine joints,
to remain permanently damp. use grade M/F sand. Support where necessary until the
mortar is set. Recommended thickness 6 mm to 40 mm.
Contact Saveto Technical Support for further
information.

Mixing Note: The mix designs are based on the use of dry
sand and aggregate. Adjustments must be made to
Care should be taken to ensure that Vetobond PB434 the water demand relative to the moisture content of
mortars are thoroughly mixed. A forced-action mixer is the sand and aggregate used. It should also be noted
essential. that, due to the frequent inconsistencies of site stored
Mixing in a suitably sized drum using an approved materials and variable conditions, actual results may
spiral paddle in a slow speed (400/500 rpm) heavy- differ from those published above.
duty drill is acceptable for occasional use.
A wide range of mix designs is achievable using Weigh the cement, sand and, where required,
Vetobond PB434. Typical designs are detailed below: aggregate into the mixer and dry blend together for
one minutes. With the machine in operation, add the
pre-mixed Vetobond PB434 and clean water. Continue
mixing for 3 minutes to ensure complete dispersal into
the sand and cement. Make any small adjustment to the
quantity of clean water but do not significantly exceed
the amount shown above. Additional water should be
kept to a minimum. Continue mixing up to a maximum
of 5 minutes until a smooth and fully homogeneous
consistency is achieved with the required workability

Ref No.: G9-BA010-02-17

Product Data Sheet Construction Materials

and application properties. It is critical that allowance use of Vetocure XT426, sprayed on to the surface of the
is made for the moisture content of the sand and finished mortar in a continuous film, is recommended.
aggregate, particularly where they are stored on site. In harsh drying conditions, supplementary curing with
polythene sheeting must be used.
Application
Over-coating with protective decorative fin-
For application to all surfaces, Vetobond PB434 mortars,
toppings and renders must be well compacted on ishes
to the primed substrate by trowel. It is frequently Vetobond PB434 mortar repairs are extremely durable
beneficial to work a thin layer of the mortar into the and will provide excellent protection to the embedded
slurry primer and then build the mortar on to this layer. steel reinforcement within the repaired locations. The
Exposed steel reinforcement should be completely surrounding parts of the structure will generally benefit
encapsulated by the mortar. from the application of a barrier/decorative coating to
Vetobond PB434 mortars can be applied at a minimum limit the advance of chlorides and carbon dioxide, thus
thickness of 6 mm and up to 40 mm thickness, bringing them up to the same protective standard as
dependent on the location and configuration of the the repair itself.
repair zone. The thickness achievable in overhead Saveto recommend the use of the Vetotouch range of
locations without the use of formwork is largely protective, anti-carbonation coatings. These products
dependent on the profile of the substrate. provide a decorative and uniform appearance as
Refer to the recommended thicknesses shown in well as protecting areas of the structure which might
the ‘Mix design’ section above. If the recommended otherwise be at risk from the environment. Vetotouch
thickness is exceeded and sagging occurs, the affected products may be applied over the repair area without
section must be completely removed and reapplied in prior removal of the Vetobond AB432 curing membrane.
accordance with the procedure described above. The This is best achieved by light grit or sandblasting.
use of formwork may facilitate achieving the required
Cleaning
build. If formwork is used, it should have properly
sealed faces to ensure that no water is absorbed form Clean tools with water promptly before material
the repair material. hardens. Hardened material can be mechanically
removed.
Where thicker sections up to a total thickness of 40 mm
are to be built up by hand or trowel application, the Packaging & Coverage
surface of the intermediate layers should be scratch-
keyed and cured with Vetobond AB432. Application of Product Pack Size Coverage

Technical Data Sheet -Vetobond PB434

the slurry primer and a further application of Vetobond
Vetobond PB434 20 & 200 Ltr As required
PB434 mortar may proceed as soon as this layer has set.

Finishing Shelf Life & Storage

Vetobond PB434 mortars can be finished with a steel, Original sealed container of Vetobond PB434 has a shelf
plastic or wood float, or by a damp sponge technique, life of 12 months provided it is stored clear of ground in
to achieve the desired surface texture. The completed a dry shaded place below 35ºC.
surface should not be overworked.
Limitations
Low temperature working
Vetobond PB434 mortars, toppings and renders should
In cold conditions down to 5ºC, the use of warm not be applied when the temperature is below 5ºC and
water (up to 30ºC) is advisable to accelerate strength falling. Neither should they be exposed to moving
development. water curing application. Exposure to heavy rainfall
Normal precautions for winter working with prior to the final set may result in surface scour. If any
cementitious materials should then be adopted. doubts arise concerning temperature or substrate
conditions, consult the local Saveto office.
High temperature working
At ambient temperatures above 35ºC, the material Health & Safety
should be stored in the shade and cool water used for
mixing. Cementitious mortars and slurries modified with
Vetobond PB434 contain cement powders which,
Curing when mixed or become damp, release alkalies which
can be harmful to skin.
Vetobond PB434 mortar, toppings and renders are
cement based. In common with all cementitious During use, avoid inhalation of dust and contact with
materials, they must be cured immediately after skin and eyes. Wear suitable protective clothing, gloves,
finishing in accordance with good concrete practice. The eye protection and respiratory protective equipment.

www.saveto.com
 Product Data Sheet Construction Materials

The use of barrier creams provide additional skin

protection. In case of contact with skin, rinse with
plenty of clean water, then cleanse with soap and
water. In case of contact with eye, rinse immediately
with plenty of clean water and seek medical advice. If
swallowed, seek medical attention immediately – do
not induce vomiting.
Refer to Material Safety Data Sheet for further
information.

Additional Information
Saveto manufactures a wide range of construction
chemicals and specialty products for various
applications divided into the following product groups:
uu Waterproofing.
uu Concrete Repairs, Grouts and Enhancement.
uu Flooring and Coating Systems.
uu Wall & Facade Systems.
uu Sealants and Joints.
uu Renders & Finishes.
uu Plasters & Masonry.
uu Tiling Systems.
uu Primers & Ancillary Products.
uu Specialty Products.
Saveto also provides various technical information
Technical Data Sheet -Vetobond PB434

such as CAD details, detailed method statements,

specification clauses, application manuals, product
selectors and technical support both in contractors
and consultants offices as well as construction sites.
For further information on these products and systems
kindly check our website or contact your local Saveto
representative.

LEGAL DISCLAIMER
Saveto endeavors to ensure that any advice, recommendations, information it may give, is accurate and correct. It cannot accept any
liability either directly or indirectly arising from the use of its products, because it has no direct or continuous control over where or how
its products are applied, whether or not in accordance with any advice, specification, recommendation or information given by us.
Saveto has the right to change any of the specifications mentioned in the Technical data sheets upon its discretion without prior
notification. Hard copies of TDSs are printed once or twice a year, while our technical data sheets are continuously being updated as per
R&D improvements and new 3rd party testing; kindly refer to our website for the latest updated TDSs.

Ref No.: G9-BA010-03-18 www.saveto.com