SynFoam syntactic Foam Logo

SynFoam HP is a high performance syntactic foam designed to safely operate in underwater environments. SynFoam HP resists water absorption and provides excellent performance for deep water submersion in both manned and unmanned vehicles. These properties have made SynFoam HP a crucial component of ROV, AUV, UUV, and HOV underwater vehicles as well as buoyancy modules designed by industrial professionals. Our HP series of foams range in density from 24 to 32 pounds per cubic foot and are highly recommended for 1K, 2K, 3K, and 4K ROV's.

SynFoam HP is available as 6” x 12” x 24” fully cured blocks. The blocks may be further machined into different sizes and shapes by the end user to meet the necessary specific tolerances and requirements. Our syntactic foam is easily bonded together with the use of our syntactic adhesive to form large structures.

If you have a specific design for use with SynFoam HP we also provide final module fabrication services. Services include machining, assembly, and finishing with a quality marine based paint.

Standard Properties

Grade Density,
Depth Rating,
Service Pressure,
Water Absorption,
24 hrs at depth
Hydrostatic Crush,
Compressive Strength,
Compressive Modulus,
HP-24 24 ± 2 1,890(6,200) 2,820 < 3% 4,200 3,000 180,000
HP-26 26 ± 2 2,900(9,500) 4,330 < 3% 5,500 4,000 215,000
HP-28 28 ± 2 3,780(12,400) 5,650 < 3% 7,100 5,000 215,000
HP-32 32 ± 2 4,270(14,000) 6,380 < 3% 8,450 6,300 230,000
For More Information please contact us by phone at (973)994-4334 or by e-mail at to further discuss your application.