bulk head foam

I am looking for a supplier of closed cell foam to build a bulk head for a poly kayak. I started my search and there are about a billion different types of closed cell foam. I am not sure what to buy and where to get it.

Grainger has over 1000 types of closed cell foam. Does anybody have a good source? And what is an appropriate type of foam.


You are looking for Minicell foam
One supplier is http://sweetcomposites.com/Minicel.html

There are others.

Is This the Same Bulkhead Foam
Used in my 25+ year old Classic Ocean Kayak Scupper?

Depends on the intent of use

– Last Updated: Feb-26-14 12:48 AM EST –

Do you plan to merely section off an area
for an air pocket/bubble increasing flotation ?
Are you planning to put your feet on it for support,
bracing your body, controlling the kayak ?


Sekisui Voltek, LLC
100 Shepard Street
Lawrence, MA 01843
Tel: (800) 225-0668
Fax: (978) 685-9861
Email: prodinfo@sekisuivoltek.com

Sekisui Voltek, LLC
17 Allen Avenue
Coldwater, MI 49036
Tel: (800) 544-2254
Fax: (517) 279-8562

Density, is a key flexible polyurethane foam, specification.
It serves as an indicator of comfort , support, and durability.
Flexible polyurethane foam density is measured in
pounds per cubic foot (pcf) or the metric equivalent (kg/m3).
A broad range of densities exist from as low as 0.8 pcf to as high as 6 pcf.

Since density is actually a measurement of mass per unit volume
it is not to be confused with weight. The higher the polymer density
of the foam, the greater the cost of the foam. Additives and fillers
will modify the polymer density changing various characteristics.

Mini-cell foam surface firmness is independent of foam density.
High density foams can be produced to be very soft.
Low density foams can be made to be very firm.

Firmness is a measurement of the surface feel of the foam.
Support is the foam's ability to "push back" against weight
and prevent the foam from "bottoming out."
Higher density foam helps prevent the feeling of having the
foam collapse beneath body weight in an application.
Both firmness and support affect foam comfort.
Higher density foams also better retain their ability to provide support.