Next generation

environmentally advanced

binder

Formulating two-component cementitious

waterproofi ng membranes

PRIMAL™ AS-8012 Styrene Acrylic Emulsion Polymer

Dow Construction Chemicals

Lon g-ter m protecti on

of build in g st ructur es

Version March 2014

Dow Construction Chemicals

– PRIMAL™ AS-8012 Styrene Acrylic Emulsion Polymer2

Introducing PRIMAL™ AS-8012 Styrene Acrylic Emulsion Polymer

– Dow’s latest generation of binders speciallydesigned to support durable waterproofi ng

– Off ering high fl exibility and elongationas well as tensile strength

– Supporting long-term protection of building structures

– Helping to raise constructionand environmental quality

A watertight approach to polymer developmentWhether it’s protecting concrete and masonry substrates from wet weather conditions, surface water splash, ground moisture ingress or the destructive action of soluble salts, responsible building designers and owners want to ensure the best possible defences.

Highly fl exible cementitious waterproofi ng membranes, applied with a brush, roller or spray cure to form a fl exible coating preventing water penetration and providing crack-bridging.

Key to the performance capabilities of the fi nal membrane are the technical characteristics of the polymer which must provide essential properties to the waterproofi ng mortar including adhesion at the mortar-substrate interface and act as an eff ective binder to hold together fi ller particles.

Performance requirementsCementitious membranes are expected to off er excellent resistance to water and long-term weathering, even when permanently exposed. High water vapour permeability helps avoiding issues such as blistering, and high toughness and scratch resistance off er durability. The systems must be easy to apply, even on complex, uneven surface shapes, and result in fully-bonded surfaces with no joints.

Such performance benefi ts have led to their widespread use in applications such as waterproofi ng wet areas, basement walls, swimming pools, balconies, facades terraces and waste-water drains. Flexible systems are also used as protective surface-coatings for concrete structures.

The importance of polymer choicePolymers act as the binder to bring adhesion, fl exibility and water resistance to waterproofi ng membranes – which are core requirements for such systems. Eff ective polymers must therefore off er: – Good fi lm formation behaviour: suitable emulsion

polymers defl occulate particles which results in a tight, non-porous, fi lm

– Stability in cement-based mixtures – Wet mortar properties (ease of application) – Water and alkali resistance – A good balance between fl exibility and tensile strength – Low glass transition temperature (Tg)

Today’s market also demands materials with a good environmental profi le alongside eff ective product performance.

Critical requirements of two-component cementitious

waterproofi ng membranes:

– Flexibility: crack bridging

– Water impermeability: water tightness

– Adhesion to concrete

– Low water absorption

3®™ Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow.

PRIMAL™ AS-8012 Acrylic EmulsionPolymer – performance features and benefi tsPRIMAL™ AS-8012 Acrylic Emulsion Polymer has been designed to off er manufacturers of two-component, cementitious waterproofi ng systems an excellent balance of performance features and mechanical properties.

This next generation polymer imparts high fl exibility, elongation and excellent crack-bridging ability.PRIMAL™ AS-8012 also helps the formulation of membranes with market-leading environmental performance and compatibility with key construction standards, including potable water applications.

Supporting standardsSelecting the right polymer is vital in the production of qualifi ed waterproofi ng materials that can meet key standards in the sector.

European standard EN 14891-2007: covering liquid applied water impermeable products for use beneath ceramic tiling bonded with adhesives PRIMAL™ AS-8012 has been designed to help achieve required performance standards in classes O (external application, crack-bridging capability at low temperatures) and P (swimming pool application, resistant to contact with chlorinated water).

Supporting potable water certifi cationA sample two-component, cementitious, fl exiblewaterproofi ng membrane containing PRIMAL™ AS-8012 wascertifi ed as compliant with BS 6920: Part 2: 2000 “Suitabilityof non-metallic products for use in contact with waterintended for human consumption with regard to their eff ecton the quality of the water” (including high temperature tests up to 50°C in accordance with BS 6920: Part 3: 2000).

Formulation recommendations and a BS 6920: Part 2 compliance letter are available in order to help producers meet regulatory requirements.

Environmental performancePRIMAL™ AS-8012 Styrene Acrylic Emulsion Polymer is APEO-free 1) and formaldehyde-free 2), and has very low Volatile Organic Content (VOC), helping manufacturers to fulfi l required product standards without compromising on their commitment to the environment.

Production and packagingPRIMAL™ AS-8012 Styrene Acrylic Emulsion Polymer is produced at Dow’s expanded manufacturing site in the Jebel Ali Free Zone (JAFZA), a state-of-the-art facility producing speciality products. The product is available in drums and in bulk.

For more information on how you could benefi t from PRIMAL™ AS-8012 Styrene Acrylic Emulsion Polymer in your two-component, cementitious, fl exible waterproofi ng systems, contact your local Dow sales representative or visit www.dowcc.com.

1) APEO is not intentionally added and is not knowingly introduced from another raw material

2) Made without formaldehyde or formaldehyde-generating materials and does not release formaldehyde under normal operating conditions. Dow however does not routinely analyze PRIMAL™ AS-8012 for

formaldehyde or any other substances that are not listed in the Safety Data Sheet or Sales Specification

Features Benefi ts

ü Balanced mechanical

properties

ü Imparts high tensile strength as well as

elongation

ü Tailored polymer design ü Good water and alkali resistance

ü Specifi cally designed

for waterproof coating

ü Supports formulation of a fi nal product

with excellent impermeability and crack

bridging performance

ü Excellent powder

compatibility

ü Improved formulation stability and

workability compared to previous polymers

Please note that the values shown are typical values for your guidance. They are not to be taken as

specifications and are subject to certain variability. Please consult the sales specifications for details.

Typical Properties

Appearance Milky White

Polymer Type Styrene acrylic

Solid, by weight, % 56

pH 6

MFFT, °C <�0

Tg -�8

Viscosity (LV_S3; 30rpm; 25°C) <�1100

Dow Chemical IMEA GmbH

P.O. Box 7893, Dubai

United Arab Emirates

Phone: +971 4 4537 000

Fax: +971 4 4537 117

Email: dccinfo@dow.com

For more information please

send your email to:

dccinfo@dow.com

Or consult our web site

www.dowcc.com

Notice

No freedom from infringement of any patent owned by Dow or others is to be inferred. Because use conditions and applicable laws may differ from one location to another and may change with time, Customer is

responsible for determining whether products and the information in this document are appropriate for Customer’s use and for ensuring that Customer’s workplace and disposal practices are in compliance with

applicable laws and other government enactments. The product shown in this literature may not be available for sale and/or available in all geographies where Dow is represented. The claims made may not have been

approved for use in all countries. Dow assumes no obligation or liability for the information in this document. References to “Dow” or the “Company” mean the Dow legal entity selling the products to Customer unless

otherwise expressly noted. NO WARRANTIES ARE GIVEN; ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY EXCLUDED.

Form No. 840-02501-0314

Version March 2014

Dow Southern Africa (Pty) Ltd

P.O. Box 2434,

New Germany, Kwa-Zulu Natal,

South Africa, 3620

Phone: +27 31716 5925

Mobile: +27 82 412 68 68

Email: knaidoo@dow.com

®™ Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow.

About Dow in the Middle East

Dow has a longstanding relationship with the Middle East beginning

with the establishment of manufacturing and commercial facilities in

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industry, partnering with leading regional companies to set up state-

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