CORPORATE PRESENTATION August 2001 Wire & CableBrass MillsProfilesFlexible Packaging

Contents n Company Overview n Business Units Overview and Highlights: Wire & Cable Brass Mills Flexible Packaging Aluminum Profiles & Curtain Walls

Company Overview: Madeco’s Ownership Structure (*) (*) As of June 30, 2001; this diagram only includes the Company’s key operating subsidiaries; for a complete listing, refer to the Company’s 20-F report

Company Overview: Revenues (1H2001) Business Unit Breakdown Regional Breakdown Total Consolidated Revenues * Ch$190,969 million (US$304 million) * In constant real pesos of June 30, 2001 Exchange rate US$1.00 = Ch$ Wire and Cable 62% Brass Mills 20% Flexible Packaging 11% Aluminum Profiles 8% Exports 19% Brazil 41% Chile 22% Argentina 12% Peru 5%

Company Overview: Consolidated Income Statement: 1Q00 - 2Q01 * In constant real pesos of June 30, 2001

Company Overview: Trends - Revenues and Operating Income Ch$ million Revenues Operating Income Ch$ million

Company Overview: Trends - SG&A as %Revenues & Operating Margin SG&A as % Revenues Operating Margin %

Company Overview: Trends - Headcount and Productivity Headcount Productivity

Company Overview: Madeco’s Strategic Initiatives 4 Focus on core businesses 4 Consolidate activities and maximize synergies through coordination 4 Improve productivity and efficiency of operations 4 Strengthen customer-oriented culture in order to best meet the needs of our clients 4 Enhance computer automation and information systems 4 Reduce consolidated debt level through internally generated funds, the sale of non-strategic assets and controlled investment activities

Santiago (15,100 tons) Buenos Aires (2) (17,690 tons) Salvador de Bahia (18,000 tons) Sao Paulo (28,500 tons) Rio de Janeiro (2) (18,000 tons) (1,000,000 kms) Lima (11,880 tons) DGMs : Durable Goods Manufacturers Wire & Cable: Products and Plants

* In constant real pesos of June 30, Calculations based on net sales revenues prior to intercompany eliminations MARKET SHARE‡ 2000 Chile 34% Argentina 8% Peru 48% Brazil-Metal 21% Brazil- Optical Fiber 18% ‡ Sources: Estimates based on Company reports, import and export reports, competitors’ reports, reports from Cochilco, Colada Continua and Cobrecon Wire & Cable: Summary of Results Argentina 8% Optical Fiber 24% Peru 13% Chile 16% Brazil 39% Revenue Breakdown+ 1H2001

+ Maximize productivity and revenues through capacity utilization optimization and coordinated regional sales efforts + Develop cable products for new applications + Implement a standardized cost and production control system across the four countries + Exploit regional synergies in the procurement of supplies + Further decrease SG&A expense levels + Restructure Brazil’s and Argentina’s operations Wire & Cable: Strategic Actions

Santiago (2) (117,500 tons) Buenos Aires (3) (18,900 tons) Quilpue (7,800 tons) Brass Mills: Products and Plants DGMs : Durable Goods Manufacturers

Revenue Breakdown+ 1H2001 Chile 67% Argentina 11% Coin Blanks 17% MARKET SHARE‡ 2000 Chile 66% Argentina 24% Coins 15% Brass Mills: Summary of Results * In constant real pesos of June 30, Calculations based on net sales revenues prior to intercompany eliminations ‡ Sources: Estimates based on Company reports, import and export reports, competitors’ reports, public and private coin bids

+ Focus special commercial efforts on export markets + Develop copper pipes as an alternative to PVC in Argentina and Uruguay + Develop new products: fittings and silver-plated busbars + Improve logistics in production, warehousing and delivery to decrease inventory level and working capital + Maximize efficiency in copper pipe production + Increase annual production capacity with minimal investment levels + Improve quality control processes Brass Mills: Strategic Actions

Santiago (13,000 tons) San Luis (6,500 tons) Flexible Packaging: Products and Plants

MARKET SHARE‡ 2000 Chile26 % Argentina 6% ‡ Sources: Estimates based on Company reports, import reports, competitors’ reports and supermarket sales statistics Flexible Packaging: Summary of Results * In constant real pesos of June 30, Calculations based on net sales revenues prior to intercompany eliminations Revenue Breakdown+ 1H2001

Flexible Packaging: Strategic Actions + Improve coordination and logistics in production, warehousing and delivery + Reduce scrap levels from 23% to 18% + Focus on innovation by developing niche products in order to provide long term differentiation vs. competitors + Focus the entire organization towards the client in order to improve customer service and relations + Foster a culture of continuous improvement, in order to make constant gains in quality and reductions in the cost structure

Santiago (16,800 tons) Aluminum Profiles & Curtain Walls: Products and Plants DGMs : Durable Goods Manufacturers

Aluminum Profiles & Curtain Walls : Summary of Results * In constant real pesos of June 30, Calculations based on net sales revenues prior to intercompany eliminations ‡ Sources: Estimates based on Company reports, import and export reports, economic statistics, reports from the Camara Chilena de la Construccion and competitors’ reports MARKET SHARE‡ 2000 Aluminum Profiles65 % Curtain Walls15% Revenue Breakdown+ 1H2001

Aluminum Profiles: Strategic Actions + Maintain market leadership through close relationships with the entire commercial chain: F Real estate developers, construction companies, architects, distributors, and installers + Improve profitability through price level recovery to international standards and the introduction of higher value- added products (Superba line) + Make continuous technological updates both in terms of production and products + Increase per capita consumption through new product development, product substitution and new aluminum profile applications

Curtain Walls: Strategic Actions + Strengthen organization in order to improve project execution, administration and control procedures + Increase competitiveness through productivity gains and reduced operating costs + Be an important player in the Chilean curtain wall industry