Zentek (ZTEK) licenses new graphite gel fire-retardant to Altek for U.S.

Rhea-AI Filing Summary

Zentek Ltd. submitted a Form 6-K for November 2025 that mainly forwards a press release about a new product and licensing arrangement. The exhibit notes that Zentek has developed a new graphite gel-based fire-retardant product and entered into an exclusive licence with Altek Advanced Materials Inc. for the United States market. This filing formally records that product development and exclusive U.S. licensing step for investors.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

OF THE SECURITIES EXCHANGE ACT OF 1934

For the month of November 2025

Commission File Number: 001-41310

ZENTEK LTD.

(Registrant)

24 Corporate Court

Guelph, Ontario N1G 5G5 Canada

(Address of Principal Executive Offices)

Indicate by check mark whether the Registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F  ☐            Form 40-F  ☒

Indicate by check mark if the Registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):  ☐

Indicate by check mark if the Registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):  ☐

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	ZENTEK LTD.
	(Registrant)
Date: November 5, 2025	By	/s/ Wendy Ford
		Wendy Ford
		Chief Financial Officer

EXHIBIT INDEX

Exhibit	Description of Exhibit
99.1	Press Release dated November 5, 2025 - Zentek Announces the Development of a New Graphite Gel-Based Fire-Retardant Product and an Exclusive Licence with Altek Advanced Materials Inc. for the US Market

FAQ

What does Zentek (ZTEK) report in this November 2025 Form 6-K?

The Form 6-K records a press release stating that Zentek Ltd. has developed a new graphite gel-based fire-retardant product and signed an exclusive U.S. licence with Altek Advanced Materials Inc..

What new product does Zentek (ZTEK) highlight in this filing?

Zentek highlights the development of a new graphite gel-based fire-retardant product, as described in Exhibit 99.1 to the Form 6-K.

Which company holds the exclusive U.S. licence for Zentek's new product?

The filing states that Altek Advanced Materials Inc. has an exclusive licence for Zentek's new graphite gel-based fire-retardant product in the U.S. market.

Does this Zentek (ZTEK) Form 6-K include a press release?

Yes. Exhibit 99.1 is described as a Press Release dated November 5, 2025 about Zentek's new graphite gel-based fire-retardant product and the exclusive U.S. licence with Altek Advanced Materials Inc.

Who signed Zentek's November 2025 Form 6-K?

The Form 6-K was signed on behalf of Zentek Ltd. by Wendy Ford, the company’s Chief Financial Officer, dated November 5, 2025.