Desco 45000 Statfree J ESD-Safe Shock-Resistant Foam Rubber Roll, Black, 24" x 40'
Desco 45000 — Statfree J ESD-Safe Shock-Resistant Foam Rubber Roll, Black, 24" × 40' × .125"
The Desco 45000 Statfree J is a dissipative cellular foam nitrile rubber roll for ESD-protected bench mats, shelf liners, and cart liners where shock absorption and non-skid grip are required. Unlike dense rubber or vinyl bench mats, the foam rubber construction cushions PCBs and assemblies against surface contact shock and prevents parts from sliding during handling. The 24" × 40' roll can be cut to any required bench or shelf length. Meets ANSI/ESD S20.20 worksurface requirements. Lead-free RoHS compliant. Made in the USA.
Key Specifications
| SKU / Part Number | 45000 |
| Series | Statfree J |
| Color | Black |
| Dimensions | 24 in × 40 ft × .125 in |
| Material | Dissipative cellular foam nitrile butadiene rubber (NBR) |
| Surface Resistance (Rtt) | Dissipative: 1 × 10⁶ to 1 × 10⁸ Ω |
| Surface Texture | Non-skid foam rubber |
| Applications | Bench mat, shelf liner, cart liner |
| Compliance | ANSI/ESD S20.20, RoHS compliant (lead-free) |
| Vendor | Desco Industries |
Key Features
- Shock-Resistant Foam Rubber Construction: Cellular foam nitrile rubber absorbs surface contact shock — protects PCBs, discrete components, and assemblies from physical damage during placement and handling. Suitable for delicate assemblies that require cushioned support.
- Non-Skid Surface: Foam rubber grip prevents PCBs and parts from sliding during bench work, tray loading, and cart transport. Components stay in position without mechanical retention.
- Dissipative ESD Protection (10⁶–10⁸ Ω Rtt): Eliminates static charge generation and provides a path to ground when properly grounded. Meets ANSI/ESD S20.20 worksurface requirements.
- 24" Width × 40' Roll: Cut to any required bench, shelf, or cart liner length. 24-inch width covers standard single-operator bench depth and common shelf widths.
- Multiple Applications: Bench worksurface mat, shelf liner in ESD-protected storage, and cart shelf liner for in-process material handling.
- RoHS Compliant (Lead-Free).
Frequently Asked Questions
What is the difference between the Statfree J foam mat and a standard rubber or vinyl ESD bench mat?
The Statfree J (45000) uses a cellular foam nitrile rubber that is compressible and shock-absorbing — it cushions components against surface impact and prevents parts from sliding with its non-skid texture. Standard rubber bench mats (like the T2 Plus) and vinyl mats (like the Z2) are denser and firmer, providing a flatter, more chemically resistant worksurface suited to active assembly with tools. Choose the Statfree J when shock absorption, non-skid grip, or protection for delicate assemblies is the priority.
Does the Desco 45000 need to be grounded?
Yes. Like all ESD worksurface mats, the Statfree J must be connected to a common point ground to dissipate static charges. A Desco mat ground cord with the appropriate snap or eyelet must be purchased separately and connected to the mat snap and the workstation ground point.
Can the Statfree J foam roll be used as a cart liner?
Yes. The non-skid foam rubber surface is well suited for cart shelf liner applications where preventing parts and assemblies from shifting during transport is important. Cut to the required shelf length and ground via the cart frame if the cart is connected to a common point ground, or use a separate ground cord.
