Flotation Foam, Ethafoam 4101-FR
SKU# ETHA4101-200
DOW Ethafoam is a highly buoyant polyethylene foam for use in flotation cushions.
Lightweight, strong, low abrasion, durable, and odorless. This FR variant contains flame-retardant additives designed to meet aerospace regulations. The foam is easy to fabricate using routing, water jet, and handsaws.
Sold per board of ≈ 2" x 36" x 24". Includes FAA burn certificate for 25.853(a). Discounts may be available for larger quantities. Please call or email to inquire.
Est. lead time: 4-8 weeks
| Color | White |
| Length |
36+ inches |
| Width |
24+ inches |
| Thickness |
2-2.3 inches |
| Weight |
2.2 lb |
| Density |
2.2 lb/ft3 |
| Compression Set, 50% (ASTM D3575) |
< 20% |
| Compressive Deflection (ASTM D3575) |
@ 10% = 8 psi |
| Water Absorption (ASTM D3575) |
0.3 lb/ft2 |
| Buoyancy (ASTM D3575) |
58 lb/ft3 |
| Flammability |
14 CFR (FAR) 25.853(a), Vertical Burn California Technical Bulletin 117 FMVSS 302, Automotive Flammability |
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If you need flotation foam in an amphibious vehicle, this product meets all requirements for automotive applications. |
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This product is acceptable for use in all types of aircraft and rotorcraft.
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This product is acceptable for use in marine applications. |
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This product has not been tested for Railway applications. In the rare scenario that you may need flotation foam for this application, this foam may be suitable. Contact us for more information. |
Buoyant, Certified Foam for Demanding Applications
When an application calls for reliable buoyancy and aerospace-grade fire performance, the right foam is key. Bramport Supply Co. offers Ethafoam 4101-FR, a highly buoyant DOW polyethylene foam designed for flotation cushions and other demanding uses across the transportation industry.
Built for Performance
Ethafoam 4101 is lightweight, strong, durable, and odorless, with low abrasion characteristics that hold up in real-world use. This FR variant contains flame-retardant additives designed to meet aerospace regulations, and it fabricates easily using routing, water jet, and handsaws; a practical advantage for shops producing custom parts.
Key Benefits
- Highly buoyant polyethylene foam suited for flotation cushions
- Lightweight, strong, durable, and odorless
- Flame-retardant additives designed to meet aerospace regulations
- Easy to fabricate with routing, water jet, and handsaws
Where It Performs Best
Ethafoam sheets and ethafoam blocks serve a range of transportation applications:
- Aircraft and rotorcraft, where it is acceptable for use in all types
- Marine applications requiring dependable flotation
- Automotive applications, including amphibious vehicles
- Projects needing the 25.853(c) Oil Burn for Seat Cushion test, when paired with Bramport Pro Fireblock Fabric
Browse the Collection
Ready to source certified, high-performance materials for your next project? Explore Bramport Supply Co.'s full range of technical textiles and foams, all tested and tailored for the transportation industry. Browse our collection today and equip your operation with materials you can trust.
Is Ethafoam 4101-FR certified for aircraft use?
Yes; it includes an FAA burn certificate for 25.853(a) and is acceptable for use in all types of aircraft and rotorcraft.
How is the foam sold?
It is sold per board measuring approximately 2" x 36" x 24". Discounts may be available for larger quantities; please call or email to inquire.
Can it be used in railway applications?
It has not been tested for railway applications; in the rare case you need it for this use, contact us for more information.