> For the complete documentation index, see [llms.txt](https://help.security.gallagher.com/knowledge-hub/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.security.gallagher.com/knowledge-hub/products/cc-hardware/readers/t-series/t-series-reader-materials-and-cleaning.md).

# Cleaning T-Series readers

Select safe cleaning agents for T-Series reader components and protective covers.

Different T-Series components use different plastics with different chemical resistance profiles. Using the wrong cleaning agent can cause permanent damage.

### Avoid damage from isopropyl alcohol

{% hint style="danger" %}
**Do not use Isopropyl Alcohol on T20 keypad keys, the T20 back cover (TPE component), or the T20 Protective Cover substrate.** Field failures and material degradation have been observed.
{% endhint %}

***

### Cleaning-agent compatibility

### T20 cleaning compatibility

| Component                      | Material                               | VHP                           | Isopropyl Alcohol                                                   |
| ------------------------------ | -------------------------------------- | ----------------------------- | ------------------------------------------------------------------- |
| T20 Substrate / Overmold       | Wonderlite PC with Hypershield coating | Good chemical resistance      | Good chemical resistance                                            |
| T20 Keypad (keys)              | PC keys with printing                  | Unknown                       | **Not recommended — field failures observed**                       |
| T20 Back Cover — TPE           | TPE Thermolast                         | Good (PC) chemical resistance | **Not recommended — embrittlement, stress cracking, discoloration** |
| T20 Back Cover — PC            | Wonderlite PC                          | Medium chemical resistance    | Good chemical resistance                                            |
| T20 Protective Cover Substrate | Wonderlite PC                          | Good chemical resistance      | **Not recommended — embrittlement, stress cracking, discoloration** |
| T20 Protective Cover Keypad    | Silicone                               | Good chemical resistance      | Good chemical resistance                                            |
| T20 Protective Cover Lens      | Wonderlite PC with Hypershield Coating | Good chemical resistance      | Good chemical resistance                                            |

***

### T11/T12 Protective Cover cleaning compatibility

| Component | Material                | VHP                                        | Isopropyl Alcohol        |
| --------- | ----------------------- | ------------------------------------------ | ------------------------ |
| T11 Cover | PC/PET Makroblend UT403 | **Not recommended — material degradation** | Good chemical resistance |

**Summary of safe cleaning approaches:**

* **VHP (Vaporised Hydrogen Peroxide):** Safe on most T20 surfaces; **not recommended** on T11/T12 protective covers.
* **Isopropyl Alcohol:** Safe on most T20 overmold surfaces; **not recommended** on T20 keypad keys, T20 back cover TPE, or T20 Protective Cover substrate.

***

🔗 **Related**

* [T-Series](/knowledge-hub/products/cc-hardware/readers/t-series.md). The reader and accessory range.


---

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