A 400-Premium Slab Adhesive (Powder-Based)

Description

Product Profile
​A 400 is a high-performance, two-component adhesive system comprising hydraulic binders, mineral aggregates, and advanced organic/polymeric additives, further reinforced with cellulose fibers. Specifically engineered for large-format porcelain slabs and natural stones, this product is ideal for both interior and exterior applications (building facades) on floors and walls. The integration of fiber reinforcement ensures superior structural integrity and bonding strength.
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Application Methodology
​To prepare, blend one 20 kg bag of A400 adhesive with 4 liters of L 300 supplementary liquid. A mechanical mixer must be used to achieve a smooth, homogeneous paste. If the consistency is too thick, small amounts of water may be added gradually until the desired texture is reached.
​Allow the mixture to mature for 5 minutes, then remix for an additional minute. Using the “double-back” bonding technique with a notched trowel, apply the adhesive to both the substrate and the back of the slab, ensuring all ridges are combed in the same direction. Once the slab is positioned, utilize a vibration machine to eliminate any trapped air pockets. Grouting should only be performed at least 72 hours post-installation. Avoid any mechanical stress, pressure, or vibrations during this curing
period to prevent slab displacement.
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Pre-Installation & Surface Preparation
​The target surface must be thoroughly cleaned of dust, debris, and grease. For installations over existing tiles, paint, or old gypsum, it is mandatory to mechanically abrade (scratch) at least two-thirds of the surface area. For substrates such as gypsum, lightweight blocks, or similar porous materials, a suitable primer coat must be applied before the adhesive. Note: This product is designed to be used exclusively in combination with the L300 supplementary liquid.
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