Sigma Non-Marring Beating Block – Eliminate Lippage & Air Gaps in Tile Installs Achieve a perfectly flat tile surface every time with the Sigma Beating Block. This non-marring PVC block expels trapped air, prevents lippage, and promotes a rock-solid bond between tile and mortar—even on vertical walls. Features & Benefits Non-Marring PVC Face – Won’t scratch polished or high-gloss tiles Generous 6 ¼" × 13" Surface – Covers large tile formats for faster bedding Air-Expulsion Ridges – Drive out pockets that weaken adhesion and cause voids Offset Ergonomic Handle – Provides a broad, balanced striking area for uniform pressure Warp-Resistant Build – Durable PVC stays true in wet or humid job-site conditions Vertical-Install Friendly – Ideal for shower walls, backsplashes, and facade panels