MAPEI fibers: two EPDs up in December 2026

What is expiring and when

Two MAPEI fiber EPDs reach the end of their current validity on December 9, 2026.

• Mapefibre ST42, a macro synthetic fiber for concrete reinforcement. (EPD International, 2026) (EPD International, 2026)
• Mapefibre IT 39 NV, a macro synthetic fiber for shotcrete and tunneling. (EPD International, 2026) (EPD International, 2026)

Both are single‑product EPDs under EN 15804 A2 with global scope. For teams tracking renewals, set your reminders to the exact date above rather than a vague “Q4” window.

Are replacements already published?

As of April 20, 2026, we did not find successor EPDs specifically for ST42 or IT 39 NV. That said, MAPEI has recently refreshed other fibers:

• Mapefibre ST50 Twisted, valid to February 8, 2029. (EPD International, 2024) (EPD International, 2024)
• Mapefibre ST55, valid to June 4, 2029. (EPD International, 2024) (EPD International, 2024)

That pattern signals active maintenance of the fiber range, so replacements for the two December items are plausible if initiated soon.

What happens if nothing new posts by December 9

On projects that require product‑specific EPDs, expired declarations usually fall out of compliance. Design teams then default to competitors with current documents to avoid conservative modeling penalties in their carbon accounting. That swap can happen quietly at submittal time, which is why tidy EPD renewals protect margin and momentum.

Likely alternates specifiers will reach for

If ST42 and IT 39 NV are not renewed on time, expect these current, broadly recognized options to show up in schedules and submittals:

• SikaFiber Macro Synthetic Fibers, with a current Type III EPD under ASTM’s program. (ASTM International, 2024)
• Euclid Chemical fiber reinforcement family covering PSI Fiberstrand and TUF‑STRAND SF under NRMCA’s program, published 2023. (NRMCA, 2023)
• FORTA‑FERRO macro synthetic fibers with a current ASTM EPD. (ASTM International, 2024)

All three are in the same functional class as MAPEI’s macro synthetic fibers, so they are credible substitutes when EPDs are mandatory.

Business impact in one jobsite metaphor

Think of the EPD like the site badge that gets a crew through the gate. When the badge expires, work doesn’t stop in theory, but access does. A quick renewal keeps crews moving, submittals clean, and your bid price from becoming the only lever left.

Renewal timing and the five‑year clock

Product‑specific EPDs typically carry five‑year validity. The two fibers above were first registered in late 2021, which is why December 9, 2026 is the operative date. Treat T‑120 days as your internal “no‑later‑than” to lock datasets, run LCA, and complete verification without risking downtime. If data are scattered across plants or ERPs, a white‑glove data collection plan is the difference between calm and chaos.

Where to find MAPEI’s EPDs and sustainability info

MAPEI lists sustainability credentials and EPD access points on its US site. Start here:

• ISO and industry certifications hub, which highlights EPD availability. https://www.mapei.com/us/en-us/about-us/mapei-in-the-usa/certifications
• Health and Environment page, which also points to program‑operator listings. https://www.mapei.com/us/en-us/about-us/sustainability/sustainability/health-and-environment

If you work from product pages, MAPEI’s tools and downloads library is a quick route to EPD PDFs alongside TDS and SDS documents. https://www.mapei.com/it/en/tools-and-downloads

What specifiers should do now

• If you rely on ST42 or IT 39 NV for tunnels, precast, or slabs, log the December 9, 2026 date and ask for renewal status in pre‑con RFIs.
• If a gap seems likely, pre‑clear one or two alternates above to avoid last‑minute value‑engineering that eats time.
• Keep submittal templates neutral and ready to swap a product‑specific EPD URL the moment a new declaration posts.

What manufacturers can do this week

• Confirm scope and sites. Will the renewal stay single‑product or consolidate variants and plants into one declaration to simplify upkeep.
• Lock the reference year and utility boundaries with operations so data pulls are painless.
• Pre‑book verification to avoid end‑of‑year queues. A tidy, complete dataset moves fastest through review.

We’ll keep watch

We will monitor MAPEI’s fiber pages and program‑operator libraries through the fall. If successors for ST42 and IT 39 NV publish ahead of December, specifiers will keep continuity and never notice a hiccup. If not, alternates with current EPDs will definately get a closer look.