Cork & Polyurethane Rubber Sheet

This red cork and polyurethane rubber blend is designed for demanding technical applications. It is particularly popular for use in flange gaskets, oil-resistant seals/gaskets, and special shapes/profiles for specific purposes or requirements. SP52 has great flexibility, and excellent tensile strength both with and across the grain, and is made for use in temperatures ranging from -40°C-110°C. It is durable and has a high coefficient of friction. 

Code: SP52

Sheet Size: 36" x 36"

Available thickness: 1/16", 3/16", 1/4", 3/8"

Binder: Polyurethane Rubber

Color: Red

Hardness: 46-66 Shore A

Density: 480-720 Kg/m ³ 

Tensile Strength (min): 
with grain-0.69 MPa
cross-grain-0.5 MPa

Compressibility @ 400 psi: 40-60%

Recovery @ psi: 75%

Cork Granule Size: 0.5-1mm

Flexibility, Original (F=5): No Cracks

Volume change after immersion:

ASTM N°1 Oil, 70h @ 100°C: -10% to +10%
IRM 903 Oil, 70h @ 100°C: +10% to +30%
ASTM Fuel A, 22h @RT: -5% to +20%

Thickness Change, IRM 903, 70h @ 125°C: 0% to +20%

Technical Data Sheet available upon request.