Questions in regard to COVID-19 Pandemic

General Questions

A: An example of our full product code is:  XP-40-X-4-CH

The first two letters signify the type of material. The following are our current materials:
XP = Crosslinked Polyethylene (XLPE)
EV = Ethyl Vinyl Acetate (EVA)
SC = Static Control
XI = Irradiated Crosslinked Polyethylene Roll
XE = Chemically Crosslinked Polyethylene Roll
EPP = Expanded Polypropylene
EPE = Expanded Polyethylene

The number in the middle signifies the density of the foam. If this is followed by a R, it indicates that the material is the single stage.
20 = 2lb, 30 = 3lb, 40 = 4lb, etc..

The letter code represents the billing size

Size Code X M W T
Billing Size 48" x 96" 39" X 79" 60" x 96" 42" x 89"

The number after represents the thickness in inches, if this is followed by a B, it indicates that the material has skins.

The letters at the end signify the color of the foam.

Color Charcoal Grey White Mint Green Lavender Blue
Color Yellow Red Lime Green Natural Black

XP-40-X-4-CH = Crosslinked Polyethylene, 4lb density, 4 x 48 x 96, Charcoal
For more information on color and size, please check out our XLPE sizing & color chart and Zotefoams sizing & color chart

A: Class "A" surface is defined as any exposed part of an automobile interior or exterior. The packaging utilized in the production, handling, and delivery of automobile parts must not in any way, affect the quality of the product. The parts must remain in the same condition as they were when originally produced.

A: Worldwide Foam manufacturers our XP/EV product line overseas using our own presses and molds. We also work with a variety of top foam manufacturers across the world to provide a wide range of products and SKUs.

A: 7 locations across North America.

A: WF does offer a variety of services to offer press-ready goods such as foam looping, PSA application, heat-lamination, and slitting. Contact us today for more information on our capabilities.

A: We are constantly expanding our product line with new materials. Please contact us at if you would like a free sample kit with all of our products.

Buying Questions

A: We offer a 1 day lead time for standard skived sheets and stock items. PSA, Heat-Lamination, and Foam Looping tend to have a 1-2 week lead time depending on the volume and current production schedules.

A: Freight is considered FOB our warehouse. We will cover the freight for orders that total $30,000 or more in a single shipment.

A: 53’ trailers can hold around 36,000 bdft depending on the material type.

A: We process all orders through the corporate headquarters in Elkhart, IN. Send your orders to for fastest service. Orders will be shipped from the most geographically correct location.

A: We accept checks, wire transfers, ACH payment, and online credit card payment. We do offer credit for those approved.

Standard stock and skived items will not have a minimum order, but there is a $50 processing fee on orders less than $500. Looped rolls and non-stock items will vary depending on material type. Contact us today for more information.

A: No, we do not. We do have different competitive pricing levels based on total annual volume. We also have annual contracts that provide you with a fixed price for the entire year. For more information, please contact our customer service.

A: If certain quantities are met we can do a custom foam run.


-100 bun minimum of 4" x 48" x 96" or equivalent
- At least 8-10 week lead time
- At least 10% price increase


-25 rolls or more for 2lb, 18 rolls or more for 4lb, and 15 rolls or more for 6lb and up (Or equivalent board feet)
-5% price increase on special size. Roll width ranging from 39" to 60"
-10% price increase on special colors
-At least 8-10 week lead time

Please contact us for more details.

A: We stock 1.5lb to 15lb densities XLPE: we stock most densities in grey or charcoal and some of them in white. 4lb is stocked in blue, yellow, and red as well. Additionally, 2lb is stocked in black, red, blue, yellow, natural, and red. Please refer to our color and sizing chart, or contact us for more details.

A: Generally no, although some materials are available with skins upon request.

A: Most tools that can be used to fabricate wood can also be used to cut our foam. These include table saws, band-saws, table routing, water-jet, etc.

A: We can return stock items and standard skived items for a 20% restocking fee. This fee is sometimes waived for contact customers. Any specialty items with added processing will be reviewed on a case-by-case basis for return eligibility.

A: We stock 3lb & 6lb static control XLPE with a surface resistivity measured from 105 to 109 ohm. For more information about the static control materials, please refer to the Static control foam whitepaper.

Typical Properties Questions

A: The foams were tested in accordance with ASTM C518-10. The R value for 2lb XLPE is around 4. Higher density foam has a lower R value. Our 15lb XLPE tested just under 2 in R value. Generally, the higher the R value, the better the insulation.

A: Maximum continuous operating temperature of our XLPE foam is between -40°F to 225°F (-40°C to 107°C)

A: XLPE foam does not have a shelf life.

A: Yes, it does; Due to the closed cell structure, XLPE is a water-resistant foam.  Click here for foam buoyancy calculation.

A: A clean room is a controlled space in which airborne contaminants are carefully kept within strict limits. These rooms are often used in manufacturing to prevent contamination. Our foam is biologically inert or dormant and is commonly used in many applications where a clean room is required.

A: Currently, we carry XP-18UL in charcoal color. It is compliant with UL 94 testing standard. In addition, most of our foam passes the FMVSS-302 motor vehicle specification. This standard measures the horizontal burn rate of materials that will be used in the occupant compartments of motor vehicles. A horizontal burn rate of fewer than four inches per minute qualifies as a pass.

A: Our foam does work well with adhesives. However, your adhesive supplier would be the best person to speak with regarding any specific questions. We carry various types of pressure-sensitive adhesive as an add-on service. Contact us for more info. <<PSA Selection Guide>>

A: EVA stands for ethylene vinyl acetate. WF's XLPE and EVA foam products are similar materials and are difficult to distinguish. The primary differences are that EVA is softer, more resilient, and has stronger recovery after compression. Whereas polyethylene foams are firmer and more resistant to heat. Both of them provide excellent protection and shock absorption for packaging applications. EVA is a copolymer of ethylene and contains wide range percentage of VA. The VA additive enhances the typical properties such as tensile, tear, elongation, and compression set while providing greater resilience and a smooth soft feel.

A: Less than 0.3125" +/- 0.03125" (1/32")
From 0.32" - .875" = +/- 10% of thickness
From .88 to 2" tolerances = +/- .094" (3/32")
Greater than 2" tolerances = +/- .125" (1/8")
2" single-stage foams, designated by the R = 1.875" Min, 2.00" Max
3" and 4" single-stage foams, designated by the R = +/- .125" (1/8")
(Single stage foam skived sheets fall under our standard tolerances)

A: Cellular foams are composed of millions of small cavities or cells. These cells may be interconnecting (open-cell) or non-connecting (closed-cell). Most of the cells or bubbles in closed-cell foams are not broken; they resemble inflated balloons compressed together in a compact configuration. Open-cell foams are connected to each other with an opening so that water, air, or gas can pass through them, similar to the way water is absorbed by a sponge. The cell walls, or surfaces of the bubbles, are broken and air fills all of the spaces in the material.

A: One-stage production uses only one set of molds and is considerably faster. Two-stage, as the name implies uses two sets of molds to manufacture the finished product. Within the same density range, two-stage foams typically come out with a smoother surface, less pinholes, and slightly better physical characteristics. One-stage tends to be heavier for a given hardness and have a coarser surface. Click here for One Stage v.s. Two Stage white paper.

A: XLPE is naturally UV resistant, dormant to bacteria, and non-toxic. We regularly test our foam for characteristics outlined in our typical property sheets. If you need to meet a certain standard or would like to do testing on your own we will gladly supply a sample of the desired foam. If certain volume requirements are met we may be able to test for a certain standard you are looking for. If you wish to have any additives added to the foam, this will count as a special order and special rates and requirements will need to be met.

A: Due to the crosslinking cell structure, XLPE foam is difficult to be recycled. However, after years of study and development, there are a few companies that have successfully developed ways to recycle XLPE scraps and reuse the materials for other applications.  This allows producers and converters of XLPE foam to save their scraps from the landfill. It provides thousands of dollars in savings for their supplier partners by eliminating disposal fees. Good for the planet, good for your bottom line. For more XLPE recycle information, please check out our Sources Web Page

A: Most of the materials in our standard XP/EV product line are stocked without skins, with the exception of our white buns and irradiated blocks. The Zotefoams XLPE and Sealed Air PE products are stocked in nominal thicknesses with skins on both sides. These can be removed per request.

A: Yes, we do stock a variety of ESD material options. Please click here to see our ESD white paper with our available material options!