Corecell™ P-Foam Structural Core Material n Excellent impact tolerance n Suitable for dynamically-loaded structures n Suitable for processing with prepregs up to 85°C n Superior styrene and temperature resistance to linear PVC foam n Highly thermoformable Introduction Corecell P-Foam shares the benefits of SAN chemistry common to all Corecell products. Environmental stability – Tolerance for heat and chemical exposure Built in toughness – Very high ductility and damage tolerance compared to cross-linked PVC and Balsa Fine cell size – Resin absorption is very low, saving both weight and cost Superior uniformity – Low density variation Eliminating outgassing – Corecell eliminates the problems of foam outgassing Compatibility – Suitable for use with all polyester, vinylester and epoxy resins No inhibition – Corecell does not inhibit epoxy curing mechanisms Handling – Tough and easy to machine Corecell P-Foam is a development of Corecell A-Foam, intended for prepreg and SPRINT® manufacturing processes. Corecell P-Foam has incredible toughness and resistance to cracking, which comes from its high ductility. Corecell P-Foam can elongate up to 65% in shear before failure, making core shear failure in a laminate almost impossible. For the manufacturer of prepreg or SPRINT® structures, especially yacht hulls, Corecell P-Foam removes the problems of outgassing inhibition or thermal stability. Corecell P-Foam is also highly thermoformable, which is invaluable in the construction of high performance prepreg or SPRINT® structures. PDS-Corecell P-Foam-7-0511 1

Type Test Method Compression Strength P600 P800 100 122 155 220 lb/ft3 6.2 .6 7 9.7 13.7 kg/m3 89-110 111-133 140-169 200-240 lb/ft3 5.5-6.9 7 .0-8.3 8.7-10.5 12.5-15.0 MPa Density Range P500 kg/m3 Nominal Density Units P1200 1.25 1.78 2.67 4.90 ASTM D1621 psi ASTM D1621 – 1973 181 258 387 710 MPa 81 113 166 295 psi 11710 16330 24030 42800 MPa Compressive Modulus 57 80 117 209 ASTM D1621 – 2004 psi Shear Strength 8280 11550 16990 30260 MPa 1.34 1.65 2.12 3.06 ASTM C273 psi 443 65 101 5360 6940 9360 14640 % 70% 65% 58% 49% MPa ASTM C273 307 48 1.78 2.21 2.85 4.17 ASTM C273 Shear Elongation at...