Mary Hall
Analyst · Jefferies
Thanks, John, and good morning, all. Please turn to Slide 5. First quarter sales of $340.1 million were down 13% due primarily to our repositioning actions in Performance Chemicals, which included a plant closure and our exit from certain low-margin end markets. Also contributing to lower sales were continued weakness in China and certain industrial end markets that negatively impacted sales in our APT segment and industrial specialties product line, more than offsetting a 3% increase in Performance Materials sales.
For the quarter, we had $64.8 million of restructuring charges and $26.5 million of CTO resale losses related to the Performance Chemicals repositioning. These charges led to a GAAP net loss of $56 million. We've excluded the impacts of the restructuring charges and the CTO resale losses in our non-GAAP disclosure and our discussion for the remainder of this presentation.
A reconciliation of our non-GAAP measures to GAAP is in the appendix to this deck and also in our earnings release and Form 10-Q, which will be filed later this evening. Our adjusted gross profit of about $120 million declined 19% and our adjusted gross margin was down 260 basis points to 35.2% due primarily to the combination of lower sales in Performance Chemicals and APT and CTO spend that was significantly higher year-over-year on lower purchase volumes.
Adjusted SG&A improved 6% year-over-year. For the quarter, we realized a total of approximately $20 million of savings related to the Performance Chemicals repositioning and the other corporate actions taken last year. Of the $20 million in savings, about $5 million is reflected in SG&A and about $15 million in COGS. We are on track to realize our target of $65 million to $75 million in annual savings.
Our diluted adjusted EPS and adjusted EBITDA declined on lower earnings, but we still delivered a strong adjusted EBITDA margin of 22.6%, reflecting the underlying strength of the company's core portfolio as we complete the repositioning of Performance Chemicals and exit certain lower-margin products and end markets. We estimate our 2024 tax rate will be between 23% and 25%, slightly higher than last year.
Turning to Slide 6, the top-left chart shows a key impact of the Performance Chemicals repositioning. As we exit the low-margin end markets in PC, the Performance Materials segment becomes a larger percentage of total company sales increasing to 43% of sales this quarter. As we discussed last quarter, our actions are improving the company's overall portfolio mix, making it more balanced and improving the margin profile.
Our first quarter free cash flow was negative $28.7 million compared to negative $20 million in Q1 last year. Remember that negative free cash flow is more the norm for the first quarter as we're building inventory for the summer paving season. But this quarter's number also includes $19.8 million of cash losses on CTO resales and $7.3 million of cash spend associated with Performance Chemicals repositioning.
While our net debt was lower year-over-year, our leverage ratio increased due to lower EBITDA. We anticipate leverage will peak in the second quarter before improving to around 3x by year-end. Reducing our leverage is our number one priority for capital allocation this year. We are in compliance with all of our bank covenants and expect to remain so.
Turning to Slide 7, you'll find results for Performance Materials. Sales were up 3% to $145.1 million and EBITDA was up an impressive 12% to $78 million with an EBITDA margin of almost 54%. Truly, the business was firing on all cylinders for the quarter. There were many drivers of this performance.
Annual price increases went into effect. Our activated carbon volumes were up in all regions. We had no scheduled nor unplanned downtime and our talented engineers completed a series of debottlenecking projects that improved plant throughput. Also, input costs such as energy and certain key raw materials were lower year-over-year.
For the remainder of the year, the segment has scheduled downtime and at least one facility in each quarter, so the benefit we saw this quarter from high utilization rates is expected to be lower going forward and energy and other input costs can fluctuate significantly as you know.
On the positive side, auto production estimates are calling for higher production this year versus last year despite softer than expected production numbers in Q1. This is a longwinded way of saying don't expect every quarter to pull or post 54% EBITDA margins. As we always caution, quarters can be choppy. For example, last year, quarterly margins ranged from 44% to 51%. We continue to expect mid-to-high 40% full year margins for this segment.
Turning to Slide 8, revenue in APT was $48 million, down 27% to primarily the lower volumes, which we attribute to the continued global demand weakness in many of the segments and markets. As John mentioned in his earlier comments, APT had a strong Q1 last year, but end market demand weakness beginning in second quarter last year.
So the Q1 year-over-year comp is challenging. China demand in particular continues to be weak, negatively impacting one of our biggest end markets in China, which is paint protective film for autos. While China auto production is up, the film is an aftermarket purchase and due to the economic slowdown, Chinese customers appear to have paused discretionary purchases on items like protective film for their cars.
While China remains weak, we are encouraged to see 2 quarters of sequential volume improvement in APT driven by Europe and North America. However, forward visibility is limited as customers continue to be cautious in their outlooks for the year. Based on discussions with customers and peers, we believe the recovery is likely to be more of a second half event.
Despite lower volumes negatively impacting plant throughput, EBITDA margins remained a healthy 20% supported by lower energy, logistics and raw material costs as well as improved SG&A as a result of cost-saving actions. Should the industrial recovery continue to be delayed, we are confident in the steps Steve and his team have taken to improve business operations.
Please turn to Slide 9 for Performance Chemicals. Sales of $147 million were down nearly $40 million as we continue to execute the repositioning of Performance Chemicals and exited lower-margin products and markets. We also experienced some softness compared to last year in certain industrial markets such as lubricants and rubber.
These end markets, along with ag chemicals and certain oil field products are the primary end markets in which we continue to participate and they represented roughly 2/3 of the $101.3 million of industrial specialty sales in the quarter. We believe this is a good proxy for quarterly sales for industrial specialties going forward in 2024. The remaining roughly 1/3 of industrial specialty sales this quarter were of finished goods inventory into the end markets we are exiting.
Road technology sales in Q1 were flat year-over-year with Q1 being a seasonally low quarter. Wet weather delayed some projects that had been slated for the first quarter in Europe, but the strength of the North American market helped minimize the impact of those delays.
We believe that summer paving season will be strong for both pavement and road markings. EBITDA for the segment was negative $10.6 million due to a significant decline in gross margin driven by higher CTO spend, which nearly doubled from last year and unfavorable plant throughput due to continued weakness in industrial end markets, which is negatively impacting utilization rates at both the Charleston and CrossFit manufacturing sites. We expect second quarter CTO spend to be similar to Q1 and expect it will trend lower in the second half of the year.
Based on the prices we see in our CTO contracts and on the spot market, we are adjusting our 2024 estimate of the losses on CTO resales from between $30 million to $80 million to between $50 million to $80 million. As a reminder, these losses are not included in our adjusted EBITDA, but are reflected in free cash flow.
In addition, we still expect to spend approximately $50 million to $60 million this year in cash costs related to the repositioning with about $7 million spent in Q1. As John mentioned, our repositioning of Performance Chemicals is on track. We have ceased production at our DeRidder site. We are realizing the cost savings from the actions we took last year and we have improved the profitability profile of the company moving forward.
And now I'll turn the call back over to John for an update on guidance and closing comments.