- Compression
- ASTM C170 Compressive Strength, w/Rift: 29,040 psi, Across Rift: 34,240 psi
- Flammability
- Non-Flammable
- Flexural Strength
- ASTM C99 Modulus of Rupture 1,470 psi; ASTM C880 Flexural Strength 1,740 psi
- Light Blocking
- Complete
- Maintenance
- See Cleaning and Sealing info
- Water Absorption
- ASTM C97 - 0.36%