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Part# 01-37600
MFR Model#
Foam TypeThick
Sheet Size
Part No.
Styrofoam FB (Blue) Large Cell 2Lb/Cu. Ft.816 x 401-37600


This blue large cell expanded foam is 2 lb. per cubic feet density and cuts easily using a hot wire to airfoil shapes. Compatible with most adhesives, but should be used only with epoxies, not polyester resins. Will dissolve in fuels and solvents. For structural use in building aircraft such as VariEze, Long-EZ, Cozy, etc.
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Product is as expected. Arrived in good shape when expected. Shipping is too expensive!

Timothy G
April 13, 2021

I received my replacement product in perfect shipping condition. Thank You Aircraft Spruce.

Michael A
June 18, 2020

Excellent service and quick delivery. I found exactly what I needed and it arrived the day after I ordered it. Great experience from start to finish.

Jonah M
April 30, 2020

Great material for shaping with minimal shedding. Highly recommend this for laying up a part or filling voids

April 26, 2020


Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Is this material used to make small planes or like RC planes? I am confused.

This is a core material which is used in many sandwich construction composite aircraft, but can also be used to shape and make small scale models or RC planes.

Q: Is this large cell styrofoam compatible with POLY EPOXY STRUCTURAL EPOXY SYSTEM?

Yes, the epoxy systems we offer are compatible with the styrofoam and polyurethane foams we stock, Poly Epoxy included.

Q: I am looking at using some of the large cell Styrofoam for a project. I will need to adhere it some metal and am trying to figure out if I can use the adhesive I have or if it will eat away at the Styrofoam. Do you know what chemicals cannot be put on the foam?

It cannot be a solvent based adhesive which would consist of acetone or MEK. Epoxy adhesives are commonly used and will not hurt the foam.

Q: If you use this foam as a core for a sandwich layup, can it be postcured? If so, what is the maximum temperature that can be used without damaging the foam?

Max service temp is 165*F. You would first want to make a test panel and post cure at or below this temp to insure the safety of your part.

Q: Can this foam be cut with a hot wire?

Yes, large and small cell styrofoam can be cut with with a hot wire.

Q: The description says this is expanded foam. Is that a typo? EPS is not suitable for structural use in building aircraft. Since this is a homogenious closed-cell matrix, NOT made up of beads, isnt this product actually extruded foam (XPS)?

It is Dow XPS foam.

Q: Is this styrofoam sandable?

Yes, it is sandable large cell. Be careful with stronger grade of sandpaper which can take out large chunks. Higher grit sandpaper is better for sanding.

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