DATA SHEET 07.2011 (replaces 08.2010) BALTEK SB Select Grade Structural Balsa CHARACTERISTICS Outstanding strength and stiffness to weight ratios Fulfills most FST (flame, smoke, toxicity) requirements First-class, select grade lumber Ecological product Extremely wide operating temperature range -212 ° to +163 ° (-414 ° to +325 ° C C F F) Excellent fatigue and impact resistance Good sound and thermal insulation Good moisture resistance ® APPLICATIONS Marine Hulls, decks, bulkheads, superstructures, interiors, tooling/molds Road and Rail Floors, roofs, side skirts, front-ends, doors, interiors, covers Wind energy Rotor blades (shear webs and shells), nacelles, spinners Aerospace: Floors, cargo pallets, cargo containers, bulkheads, general aviation (fuselage & wing) Defense: Naval vessels, containers, cargo pallets, shelters, ballistic panels Industrial: Tanks, ductwork, covers, containers, architectural panels, concrete forms, infrastructure, impact limiters, sporting goods PROCESSING BALTEK SB is a core material produced from select kilndried balsa wood in the ‘endgrain’ configuration. It has extremely high strength and stiffness to weight ratios, and achieves an excellent bond with all types of resins and adhesives. It is compatible with a variety of manufacturing processes and is resistant to temperature changes, or exposure to fire, or chemicals such as styrene. ® BALTEK SB is an ideal core material for an extensive range of applications subjected to static or dynamic loads in service. All while being a renewable resource. Adhesive bonding Compression molding Contact molding (hand/spray) Pre-preg processing (up to 180 ° 355 ° C, F) Resin injection (RTM) Vacuum infusion www.3ACCorematerials.com Europe ‫ ׀‬Middle East ‫ ׀‬India ‫ ׀‬Africa North America ‫ ׀‬South America Asia ‫ ׀‬Australia ‫ ׀‬New Zealand

Unit (metrical) Typical properties for BALTEK SB Apparent nominal density Compressive strength perpendicular to the plane Compressive modulus perpendicular to the plane Tensile strength perpendicular to the plane Tensile modulus perpendicular to the plane Shear strength Shear modulus Thermal conductivity at room temperature Standard sheet Finishing Options, other dimensions and tolerances upon request 1) 2) above 38 mm sheets are 609.6 x 609.6 mm Thicknesses > 50mm upon request Please specify Lamprep (micro-sanded) surface treatment or AL600/10 coating (decreases porosity and increases bond strength)...

Unit (imperial) Typical properties for BALTEK SB Apparent nominal density Compressive strength perpendicular to the plane Compressive modulus perpendicular to the plane Tensile strength perpendicular to the plane Tensile modulus perpendicular to the plane Shear strength Shear modulus Thermal conductivity at room temperature Standard sheet Finishing Options, other dimensions and tolerances upon request 1) 2) above 38 mm (1 ½ “) sheets are 24” by 24” Thicknesses > 2” upon request Please specify Lamprep (micro-sanded) surface treatment or AL600/10 coating (decreases porosity and increases bond strength)...