Roto Marine Products Floats

Permafloat® Performance Dock Flotation®

Permafloat® Dock Floats are premium-quality, durable, and can be easily attached to nearly any new or existing wood, steel, or aluminum dock system. Cellofoam rotationally molds each Permafloat® with a nominal 0.150 inch thick walls using virgin polyethylene with ultraviolet inhibitors to make the floats extra durable to withstand damage from harsh marine environments. Permafloat® Dock Floats are filled with expanded polystyrene foam for superior buoyancy, and the rugged shell encapsulates the foam to protect the marine environment. The floats are suitable for both residential and commercial applications, and are backed by a 15-year limited manufacturer warranty.

Cellofoam was a pioneer in the encapsulation of EPS foam in docks to protect the environment. We have taken this environmentally friendly stance one step further by refusing to sell EPS foam for unencapsulated dock flotation.

24" x 48" x 12" Permafloat Performance Dock Flotation
Close-up photo of a Permafloat dock float showing two options for connecting to a dock
48" x 96" x 20" Permafloat Performance Dock Flotation

Key Features

Permafloat® Standards for Encapsulated Dock Flotation:

US Army Corp. of Engineers Regulation 36 CFR Part 327.30

Meets or exceeds US Army Corp. of Engineers requirements for encapsulated dock floats

Flame Retardant – UL94

LLDPE shell material and EPS foam fill material complies with UL94 HB test standard


Encasement Wall Thickness

➢ 0.150” nominal / 0.125” minimum

• ARM Falling Dart Impact Test

➢ Quality Control test at ambient and low temperatures.

• UV Stabilization – UV20

• Environmental Stress Crack Resistance (ESCR)

➢ >1000 hrs.

➢ ASTM D1693

• Complies With

➢ US FDA 21 CFR 177.1520 (c)3.1a (with restrictions)

➢ NSF51 and NSF61

FOAM FILL MATERIAL: Expanded Polystyrene (EPS)

7-Day Hunt Water Absorption Test

➢ Water absorption < 3.0 pcf

➢ Density = 0.90 pcf. minimum

• Flexural Strength Test* - ASTM C203-05(a)

➢ 12-14 psi

• Compressive Strength Test* - ASTM D1621

*Quality Control Tests to confirm EPS foam fusion for long-term performance and structural integrity

Purchasers of our floats and lift tanks should engage with professional design experts to incorporate these products into their marine systems.


Protect your product. Protect your brand. Protect what matters most with Cellofoam

We’re dedicated to manufacturing products that meet the highest standards of quality and performance. Need to know if Cellofoam’s products are right for your next project? Reach out to our team.