PORON® 4790-79 Gaskets
(Display Back Pad Foam)
PORON® ShockSeal® 4790-79 is a firm microcellular polyurethane foam engineered for shock absorption, impact management, and sealing applications. It is designed to absorb and dissipate impact energy while maintaining reliable sealing performance in applications exposed to vibration and mechanical shock. Its firm structure provides consistent support and excellent compression set resistance, helping maintain long-term performance in demanding environments.
Gasket and Seal Fabricators stocks PORON 4790-79 across a range of densities and fabricates precision die-cut parts to extremely tight tolerances. The material offers low-outgassing performance and is well suited for industrial equipment, electronic assemblies, and other applications requiring both impact protection and environmental sealing. Available with or without pressure-sensitive adhesive (PSA) backing.
Why Specify PORON® 4790-79 Gasket Material?
4790-79 solves a specific problem: protecting a display in a device where there’s almost no room to work with. At thicknesses ranging from 0.062″–0.375″, it adds negligible stack height while still absorbing and spreading the impact energy of a drop, reduce the risk of cracked screens and damage to sensitive components. Its firm character keeps the display properly supported and stabilized rather than allowing excessive flex. That’s why it’s so widely used as a display back pad and LCD stabilizer in slim consumer electronics, where every fraction of a millimeter counts.
Common Applications
PORON 4790-79 is built for ultra-thin protection and support in compact devices, including:
- Display back pads in smartphones and tablets
- LCD stabilization and support
- Thin-profile cushioning in handheld instruments
- Vibration management in compact electronic assemblies
- Shock absorption to help reduce the risk of screen damage from drops and impact
PORON® 4790-79 Specifications
Property |
Specification |
|---|---|
Firmness |
Firm (Thin Profile) |
Density Range |
Multiple density options available |
Standard Thickness Range |
0.062"-0.375" |
CFD @ 25% Deflection |
3 or 13 psi |
Primary Use |
Display back pad, LCD stabilizer, thin cushion |
Adhesive Options |
With or without PSA backing |
Compliance |
Contact Gasket & Seal for compliance information and application-specific requirements. |
Fabrication & Custom Options
Every PORON 4790-79 part is fabricated to your specifications. Ultra-thin material demands precision, and we die-cut and kiss-cut to tight tolerances, work from your CAD files, or reverse-engineer existing parts. Material is available as raw sheet stock or as finished pads, with PSA backing for simplified, repeatable assembly. We can supply parts kiss-cut on a liner for easy placement in high-volume electronics production.
Need More Thickness or a Softer Feel?
4790-79 is specialized for ultra-thin display protection. For extra-soft, slow-rebound cushioning and battery pads, see PORON® 4790-92. For thin display gaskets and LCD sealing with a softer touch, the very soft PORON® 4701-30 is also worth a look. Compare all grades on the main PORON® gasket page.
One Call, Complete Solutions
Talk to our technical team about selecting the right PORON grade, fabrication options, and pricing for your project.
