Mapei Ultrabond Eco 903 Tongue and Groove Glue

Mapei Ultrabond ECO 903 Tongue and Groove Glue Ultrabond ECO 903 is a high-performance, high-solids, acrylic latex-based adhesive designed for bonding floating wood flooring or for general wood carpentry purposes. Applied along the tongue-and-groove edges of floating floor planks to lock boards together and add extra bond strength between them. Water-resistant once cured, making it a reliable choice for floating engineered or laminate floors that need a tight, secure joint at every seam. A little goes a long way — one bottle covers roughly 300–400 linear feet of board joints. Comes in an easy-to-use squeeze bottle applicator, so there's no gun, trowel, or mixing needed — just apply directly along the groove before locking boards together. Click here for Technical Data Sheet Spec Detail Type High-solids, acrylic latex-based tongue-and-groove glue Use Bonding floating wood flooring joints; general wood carpentry Water resistance Yes, once cured Coverage Approx. 300–400 linear feet per bottle VOC compliance SCAQMD Rule #1168 Emissions certification CDPH Standard Method v1.2-2017; SCS Indoor Advantage Gold Material reporting Red List Free (Living Building Challenge; not applicable for LEED) Package size 16 oz squeeze bottle Is this a substitute for a trowel adhesive under the whole floor? No — this is a tongue-and-groove joint glue for floating floors, not a full-spread bonding adhesive. It's applied only at the plank joints. Is it water-resistant once dry? Yes — it cures to a water-resistant bond, suitable for engineered and laminate floating floor installs. How much do I need for my job? One 16 oz bottle covers roughly 300–400 linear feet of joints — measure your total plank-edge length to estimate quantity. Does it work for general woodworking, not just flooring? Yes — it's also suited for general wood carpentry purposes beyond flooring installation. Sku: 2487656