Exhibit 99.2

JOINT FILING AGREEMENT

In accordance with Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of each of them of a statement on Schedule 13G (including amendments thereto) with respect to the common stock, par value $0.01 per share, of Solaris Oilfield Infrastructure, Inc., and further agree that this Joint Filing Agreement be included as an exhibit to such joint filings. In evidence thereof, each of the undersigned hereby executes this Joint Filing Agreement as of March 26, 2021.

*

Dan H. Wilks

*

Staci Wilks

THRC Management, LLC
By:	/s/ Matthew Wilks
Name: Matthew Wilks
Title: Attorney-in-Fact
THRC Holdings, LP
By:	/s/ Matthew Wilks
Name: Matthew Wilks
Title: Attorney-in-Fact

*By:	/s/ Matthew Wilks
	Matthew Wilks, as Attorney-in-Fact

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