Subsea buoyancy foam and ballast

Syntactic and subsea buoyancy foam and ballast weights for trimming ROVs and AUVs. Choose foam by the depth grade the manufacturer rates it for, then size it from your vehicle's weight in water.

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Blu-Float Solid Buoyancy Foam

Blu-Sub Mechatronics

Blu-Float Solid Buoyancy Foam

Buoyancy foam

Density: 0.36-0.57 g/cm3 (+/- 0.02, by depth rating)
Depth Ratings: 500 m, 1,200 m, 1,500 m, 2,000 m, 3,000 m, 6,000 m
Compressive Strength: >=12 MPa (500 m) to >=70 MPa (6,000 m)

Subsea Buoyancy Foam: R-3312 (12 in X 6 in X 1 in)

Blue Robotics

Subsea Buoyancy Foam: R-3312 (12 in X 6 in X 1 in)

Enclosures, Buoyancy, and Ballast

Subsea Buoyancy Foam: R-3312 (12 in X 6 in X 1 in) from Blue Robotics, part number BR-100398-002. Earlier part…

Subsea Buoyancy Foam: R-3312 (16 in X 8 in X 1 in)

Blue Robotics

Subsea Buoyancy Foam: R-3312 (16 in X 8 in X 1 in)

Enclosures, Buoyancy, and Ballast

Subsea Buoyancy Foam: R-3312 (16 in X 8 in X 1 in) from Blue Robotics, part number BR-100398-003. Earlier part…

Subsea Buoyancy Foam: R-3312 (24 in X 8 in X 2.5 in)

Blue Robotics

Subsea Buoyancy Foam: R-3312 (24 in X 8 in X 2.5 in)

Enclosures, Buoyancy, and Ballast

Subsea Buoyancy Foam: R-3312 (24 in X 8 in X 2.5 in) from Blue Robotics, part number BR-100398-004. Earlier…

Subsea Buoyancy Foam: R-3312 (8 in X 4 in X 0.5 in)

Blue Robotics

Subsea Buoyancy Foam: R-3312 (8 in X 4 in X 0.5 in)

Enclosures, Buoyancy, and Ballast

Subsea Buoyancy Foam: R-3312 (8 in X 4 in X 0.5 in) from Blue Robotics, part number BR-100398-005. Earlier…

Subsea Buoyancy Foam: R-3318 (1.9 in X 3.4 in X 4.9in)

Blue Robotics

Subsea Buoyancy Foam: R-3318 (1.9 in X 3.4 in X 4.9in)

Enclosures, Buoyancy, and Ballast

Subsea Buoyancy Foam: R-3318 (1.9 in X 3.4 in X 4.9in) from Blue Robotics, part number BR-100398-001. Earlier…

Blue Robotics

Subsea Buoyancy Foam: R-3318 (24 in X 8 in X 2.5 in)

Enclosures, Buoyancy, and Ballast

Subsea Buoyancy Foam: R-3318 (24 in X 8 in X 2.5 in) from Blue Robotics, part number BR-100398-006. Earlier…

Showing 7 of 7 products.

How to choose buoyancy and ballast

Trim slightly positive

Most ROVs are trimmed to float very slightly, so a vehicle that loses power comes back up. Work out the net weight in water first, then the foam to offset it.

Buoyancy and ballast calculation →

Foam grade sets the depth

Foam compresses and loses buoyancy past its rated depth. Choose the grade for your deepest dive; deeper grades are denser and give less lift per litre.

Selection and build guides

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