Agreement Expands the Company’s Distribution to North American Plastics Processors

Hawthorne, Calif. – July 15, 2009 – Cereplast, Inc. (OTC BB: CERP), developer of proprietary bio-based
sustainable plastics, today announced a new strategic partnership with Chase Plastics to distribute
Cereplast’s bio-based resins in North America. This agreement signals Cereplast’s long-term commitment
to broadening the supply of its bio-based resins to North American plastics processors. The strategic
partnership with Chase Plastics is another indication of the rapid rate of growth of the market for
Cereplast’s bio-based resins, as well as the company’s ability to supply a major channel of distribution.

Chase Plastics is one of North America’s fastest growing, full-service specialty engineering thermoplastic
distributors, serving plastic processors in the United States, Canada, Mexico, and Central America.
Chase Plastics delivers specialty, engineering and commodity thermoplastics in a wide variety of
compounds encompassing every thermoplastic. Chase operates more than 20 warehouses throughout
North America capable of carrying and stocking Cereplast’s bio-based resins available for next day shipping.

Plastics processors purchasing Cereplast’s bio-based resins will benefit from the many advantages that
Chase Plastics offers, including local inventory and stocking programs, technical service, broad product
line, and professional sales staff.

“With this agreement we are able to supply Cereplast Compostables® and Hybrids® to a wide range of
plastics processors to create the innovative, “green” products that today’s brands and retailers are looking
for to meet their sustainability objectives.” said Kevin Chase, President. Plastics processors interested in
purchasing Cereplast bio-based resins from Chase Plastics can call 1-800-232-4273 or visit www.chaseplastics.wpengine.com

About Cereplast, Inc.
Cereplast, Inc. (OTCBB:CERP) designs and develops proprietary bio-based, sustainable plastics which
are used as substitutes for petroleum-based plastics in all major converting processes – such as injection
molding, thermoforming, blow molding and extrusions – at a pricing structure that is competitive with
petroleum-based plastics. On the cutting-edge of bio-based plastic material development, Cereplast now
offers resins to meet a variety of customer demands. Cereplast Compostables(R) resins are ideally suited
for single use applications where high bio-based content and compostability are advantageous, especially
in the food service industry. Cereplast Hybrid Resins(R) combine high bio-based content with the
durability and endurance of traditional plastic, making them ideal for applications in industries such as
automotive, consumer electronics and packaging. Learn more at www.cereplast.com

About Chase Plastics
Chase Plastics distributes more than 4,500 varieties of specialty and engineering thermoplastics from
the industry’s leading manufacturers and global suppliers. In addition, Chase delivers engineering
expertise and blending, repacking, inventory management, third-party storage capabilities and logistics
services via a network of distribution centers, warehouses and sales locations throughout North and
Central America.

Chase Plastics is redefining plastics distribution with an approach to business that puts customer needs
first. Formed in 1992, Chase Plastics has built its business on the ability to respond quickly with all of
the flexibility and agility that its customers require. Based in Clarkston, Mich., Chase Plastics was
founded by Kevin and Carole Chase who serve as the company’s president and vice president,
respectively.

Find more information at www.chaseplastics.wpengine.com

Safe Harbor Statement
Matters discussed in this press release contain forward-looking statements within the meaning of the
Private Securities Litigation Reform Act of 1995. When used in this press release, the words “anticipate,”
“believe,” “estimate,” “may,” “intend,” “expect” and similar expressions identify such forward-looking
statements. Actual results, performance or achievements could differ materially from those contemplated,
expressed or implied by the forward-looking statements contained herein. These forward-looking
statements are based largely on the expectations of the Company and are subject to a number of risks
and uncertainties. These include, but are not limited to, risks and uncertainties associated with: the
impact of economic, competitive and other factors affecting the Company and its operations, markets,
product, and distributor performance, the impact on the national and local economies resulting from
terrorist actions, and U.S. actions subsequently; and other factors detailed in reports filed by the Company.

Contact:

For Cereplast, Inc.
Philippe Ravera
(310) 676 5000
investor.relations@cereplast.com

Download PDF: Cereplast’s Bio-Based Resins to be Distributed by Chase Plastics