While PORON might work for your project, you may also explore the possibility of other foam tape materials. We’ll review eleven different types of PORON, but if you’re interested in other types of foam tape, consider this extended list of options:

This foam is easy to die cut with precision. It will retain its shape long-term after being cut. CONS Once the pressure is released, the cushioning foam will expand to its full size or until it meets a new obstacle. This is a method of creating physical memory. PORON® Urethanes are patented open cell, breathable materials. The open cells act like tiny springs absorbing impact and providing cushioning to the body. PORON® Urethanes are designed to maintain their memory and continue to return to their original shape. The materials are resistant to moisture and other environmental conditions offering continued cushioning comfort in footwear, orthotic appliances, apparel and other applications. Available in different grades – including PORON® 4701-40 soft foam, PORON® 4701-50 firm foam for managing high energy impact and PORON® 4701-60 firm foam for energy management solutions including enclosure gaskets This is one of the most durable PORON products. It resists tearing, corrosion, mildew, and bacteria. PROSDie cut PORON foam can be customized to your project's exact needs while, at the same time, keeping the efficiency of mass production. Die cutting is just one customization service that will help you produce your foam parts in a timely and cost-effective manner. PN A thin adhesive mechanism has been integrated into the casting process which provides a high adhesive force after the release liner is removed and eliminates the need for adhesive tape

PORON foam is meant to keep its shape, cushioning, and contouring precisely in response to pressure. These viscoelastic properties are derived from the foam’s microcellular design. Finally, coming to the stabilizers. The keyboard uses PCB-mount screw-in stabilizers that attach to the PCB, instead of plate-mounted ones that, as the name suggests, attach to the switch plate. This is a nice addition to the keyboard as screw-in stabilizers are less prone to wire-popping and are more stable on the keyboard. They do not come pre-lubed, however, so make sure to have your preferred lube ready before you install it onto the PCB. As a polymer with a closed-cell structure, it will not revert to an expanded state after it has been vacuum-sealed. It cannot be reused for other applications. RECOMMENDED USE Besides the barebones kit, the Epomaker EK75’s box contains poron gaskets to be applied on the switch plate, seemingly high-quality gold plated PCB-mount stabilizer wires with transparent housing, a braided white USB-C cable, and a two-in-one switch and keycap puller. Epomaker EK75 - Design and Features Rogers Corporation, a global leader in materials development, has patented thirty-five PORON Industrial Polyurethanes. These open-cell polyurethane materials have solved unique engineering challenges, including filling gaps in the Hubble space telescope.

Microcellular Construction

This foam also tends to swell when it absorbs water. It cannot be submerged. Moreover, this foam series is not particularly resistant to automotive fluids. RECOMMENDED USE Due to this gradient, the PORON EVExtend® does not have a consistent density throughout. It functions in temperatures that range from -20ºC to 90ºC. PROS

ASRS has all the same excellent advantages as SR-S, Additionally ASRS is resistant to static electricitiy. It is ideal for anti-static applications. Low compression set– PORON cellular urethane has superior resistance to taking a compression set as compared to neoprene sponge or polyethylene foam. Less than 2% at 73°F and less than 10% at 158°F makes PORON an ideal gasketing material for many indoor enclosure applications where dust, light and incidental splash sealing are required. LF Special surface treatment technology provides higher surface slidability and adhesion prevention performance.Over time, repeated compression causes air to leak out of the closed cells. Because the cells shut it out, air cannot return to the foam. This process of exhalation deflates the foam. OPEN-CELL VS. CLOSED-CELL FOAM This polyurethane foam series is composed of the second softest PORON foams. Some of its softness is traded for higher tensile strength than the 4701-30 series. SS The high- resistance material, while similar to the Standard Series, is equivalent in softness to the SR-S grade. Its features excellent temperature dependence The AquaPro Series has been shown to waterproof even the most minor gaps. It seals gasket widths as narrow as 0.5mm. Once sealed, the gaskets are impervious to water. PORON 4701-60 is not soft. This makes it unsuitable for cushioning a human body directly or any delicate electronic components.