Technical Data Sheet
RHOPLEX™ MC-76
Acrylic Polymer
Introduction
RHOPLEX™ MC-76 cement modifier can be used in both sprayable and patching mortar
applications. This acrylic polymer is designed for sprayable cementitious compositions – like
exterior insulation and finish systems (EIFS) basecoats and adhesives and sprayable stucco-type
coatings – and can be applied over a variety of surfaces. Applied correctly, this modifier works well
on old concrete and masonry, brick, wood, metals and many other surfaces.
Typical Physical Properties
These properties are typical but should not be considered specifications.
Milky white liquid
Appearance
47 ± 0.5
Solids content, % by weight
pH (when packed)
9.3-10.2
Specific gravity
1.059
Density, lbs/gal
8.8
Freeze-thaw stability
5 cycles
Glass transition temperature (Tg), °C 13
Minimum film formation 10-12
temperature (MFFT), °C
Performance
Advantages
Wet Mortar Density
Cement mortars modified with RHOPLEX™ MC-76 exhibit increased tensile and flexural strengths
versus unmodified mortars. When ambiently cured, thin sections dry rapidly and exhibit excellent
toughness and good adhesion to old concrete masonry, brick, wood, metals and many other
surfaces. Chemical resistance is improved over unmodified mortars.
Pot Life
RHOPLEX™ MC-76 modified mortars exhibit exceptional pot life under high temperature conditions
versus other polymer-modified mortars. Under conditions of higher shear, such as spray applications,
mortars modified with RHOPLEX™ MC-76 offer good stability and ease of application.
Test method/formulation information can be provided upon request.
Pot Life Comparison: RHOPLEX™ MC-76 Versus Competitive Latex at 42°C
RHOPLEX™ MC-76
3-5 hours
Competitive Latex
<1 hour
Formulation
Guidelines
Contact your local Dow representative for suggested starting point formulations and related information.
Storage
RHOPLEX™ MC-76 emulsion is sediment-free and stable to a minimum of five cycles of freezing
at -18°C and thawing at 23°C. These characteristics help ensure trouble-free storage and package
stability for extended periods of time.
Safe Handling
Information
Animal toxicity screening tests conducted on closely related analogs of RHOPLEX™ MC-76 suggest
that this product should be essentially nontoxic by single acute oral or dermal exposure and that
it may also be a mild to moderate skin and eye irritant. In addition, many of the components of
cement used in conjunction with RHOPLEX™ MC-76 may also possess significant skin and eye
irritant potential.
Page 1 of 2
®™Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow
RHOPLEX™ MC-76 / Dow Construction Chemicals
July 2010
Product
Stewardship
Dow has a fundamental concern for all who make, distribute and use its products, and for the
environment in which we live. This concern is the basis for our product stewardship philosophy
by which we assess the safety, health and environmental information on our products and
then take appropriate steps to protect employee and public health and our environment. The
success of our product stewardship program rests with each and every individual involved with
Dow products – from the initial concept and research to manufacture, use, sale, disposal and
recycle of each product.
Customer Notice
Dow strongly encourages its customers to review both their manufacturing processes and
their applications of Dow products from the standpoint of human health and environmental
quality to ensure that Dow products are not used in ways for which they are not intended or
tested. Dow personnel are available to answer your questions and to provide reasonable
technical support. Dow product literature, including safety data sheets, should be consulted
prior to use of Dow products. Current safety data sheets are available from Dow.
Disclaimer
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, the Customer is responsible for determining whether products and
the information in this document are appropriate for the Customer’s use and for ensuring that
the Customer’s workplace and disposal practices are in compliance with applicable laws and
other governmental 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.
The Dow Chemical Company
www.dowconstructionchemicals.com
215-592-3000
Page 2 of 2
®™Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow
RHOPLEX™ MC-76 / Dow Construction Chemicals
Form No. 832-00132-0710P&M
July 2010