Based on your installation method, there are two primary options to seaming two pieces of vinyl flooring together. For seaming two mats, use G‑Floor Seam Tape or G‑Floor Center Trim. For more than two mats, we only recommend using Center Trim to prevent center mats from buckling. Get info on both seaming products here: https://bltllc.com/gfloor-universal-flooring/accessories/
https://bltllc.com/g-floor-installation-instructions/