Desco 66320 Statfree UC2 Dissipative Dual Layer Rubber Roll, Sky Blue, 30" x 40' x .080"
Desco 66320 — Statfree UC2 Dissipative Dual Layer Rubber Roll, Sky Blue, 30" × 40' × .080"
The Desco 66320 Statfree UC2 is a cleanroom-grade dissipative dual layer rubber roll for custom-cut ESD worksurface installations in controlled environments. The roll contains no detectable levels of silicone or DOP, making it suitable for use in Class 100 (ISO 5) and higher cleanrooms where outgassing and contamination control are critical. The 30-inch width suits standard single-operator bench configurations. Cut to any required bench length from the 40-foot roll. Meets ANSI/ESD S20.20 worksurface requirements. Made in the USA.
* Although cleanroom requirements vary, Statfree UC2 material will most likely meet the requirements for a Class 100 or higher cleanroom. Verify against your facility’s specific contamination control requirements.
Key Specifications
| SKU / Part Number | 66320 |
| Series | Statfree UC2 (Cleanroom) |
| Format | Roll (custom-cut to length) |
| Color | Sky Blue |
| Dimensions | 30 in × 40 ft × .080 in |
| Cleanroom Rating | No detectable silicone or DOP; approved for Class 100 (ISO 5) and higher cleanrooms |
| Top Layer Resistance (Rtt) | Dissipative: 1 × 10⁶ to <1 × 10⁹ Ω |
| Bottom Layer Resistance (Rtt) | Highly Conductive: <1 × 10⁴ Ω |
| Material | High strength nitrile rubber (no silicone, no DOP) |
| Compliance | ANSI/ESD S20.20, ANSI/ESD S4.1, RoHS compliant |
| Origin | Made in USA |
Key Features
- Class 100 Cleanroom Compatible: No detectable levels of silicone or DOP. Approved for use in Class 100 (ISO 5) and higher cleanrooms where outgassing and ionic contamination control are critical requirements.
- Dissipative Top Layer: Meets ANSI/ESD S20.20 worksurface required limits and ANSI/ESD S4.1 recommendations. Does not generate static charge; controls discharge rate from ESD-sensitive devices on the surface.
- Highly Conductive Bottom Layer (<1×10⁴ Ω): Lower-resistance path to ground than standard T2 Plus mats. Compatible with ESD workstation continuous monitors.
- High Strength Nitrile Rubber: Designed to withstand abrasion, stretching, and tearing. Suitable for soldering applications with flux and other chemicals.
- UV Stabilizer Additives: Preserves color retention and ESD performance; prevents surface cracking and deterioration over time.
- Roll Format — Custom Cut to Length: 30" × 40' roll can be cut to any required bench length. For a pre-cut cleanroom mat with ground cord included, see the Desco 66330 (30" × 72" UC2 mat).
- RoHS Compliant. Made in USA.
Frequently Asked Questions
What is the difference between the Desco 66320 roll and the 66330 mat?
Both are Statfree UC2 series cleanroom ESD mats with the same nitrile rubber compound and dual layer construction. Key differences: the 66320 is a 30" × 40' roll for custom-cut installations with no ground cord included. The 66330 is a pre-cut 30" × 72" mat that is cleaned and packaged in a Class 1000 controlled environment, double bagged, and includes the Desco 14213 ground cord for immediate installation.
Why does the UC2 series specify no silicone or DOP?
Silicone and DOP (dioctyl phthalate) are common plasticizers and mold release agents that outgas over time and can contaminate sensitive surfaces, optical components, and electronic assemblies in cleanroom environments. By using a compound with no detectable silicone or DOP, the UC2 series minimizes contamination risk for Class 100 and higher cleanroom applications.
Does the 66320 roll include a ground cord?
No. The 66320 is the roll only. A mat grounding cord must be purchased separately to connect the mat to a common point ground at the workstation. If you need a complete kit with ground cord included, see the Desco 66330 pre-cut mat.
