When the job demands superior adhesion for levelling compounds or cementitious adhesives across diverse interior surfaces, Eco Prim T Plus delivers. This solvent-free, acrylic primer ensures consistent, reliable bonding, whether you're working with concrete, timber, or existing tiles. It sets the foundation for a durable floor finish, eliminating the guesswork of substrate compatibility.

Why this product exists

Developed as a versatile, solvent-free acrylic primer, Eco Prim T Plus addresses the critical need for robust, universal adhesion on interior floors. It tackles the challenge of preparing both absorbent and non-absorbent surfaces for subsequent layers. From compact cementitious screeds to existing ceramic tiles, this formulation ensures levelling compounds and cementitious adhesives bond securely, preventing costly delamination and callbacks. Its very low VOC emissions also contribute to a healthier indoor environment.

The numbers that matter

  • Dry solids content: 42% — A higher dry solids content means more active bonding material per application, offering robust adhesion without excessive coats and ensuring comprehensive coverage.
  • Drying time: 15-20 minutes (concrete/wood) to 30-40 minutes (ceramic) — This rapid drying allows for quicker project turnaround. It means the next stage, such as applying a levelling compound or adhesive, can commence sooner, streamlining workflow without compromising bond strength.
  • VOC emissions: Very low — This primer significantly contributes towards Green Star credits, supporting sustainable building practices and ensuring a healthier indoor air quality for occupants and installers alike.

What it's like to use

Eco Prim T Plus is supplied as a ready-to-use liquid, easily applied with a brush or roller. For cementitious or anhydrite surfaces, it is typically diluted 1:2 with water. On existing ceramic, natural stone, or water-resistant adhesive residues, it is used undiluted. Once applied, the primer dries quickly, with subsequent layers of adhesive or levelling compound possible within 2-5 hours, depending on environmental conditions. Tools and spills clean readily with water while the primer is wet; dried primer requires alcohol or Pulicol 2000 for removal.

Where this product excels

  • Flooring preparation: For preparing compact cementitious renders, concrete floors, or timber-based substrates like plywood and chipboard before applying Mapei levelling products. It creates a critical bond layer, ensuring the longevity of the finished floor.
  • Tile-over-tile renovations: When installing new ceramic or natural stone tiles over existing, sound tile surfaces, Eco Prim T Plus provides the necessary adhesion for cementitious adhesives, saving time and effort by avoiding demolition.
  • Substrate renovation: Ideal for surfaces with old adhesive residues or existing smoothing compounds, ensuring a clean, prepared base for new finishes without extensive substrate removal, provided residues are water-resistant.

How it fits in a real system

Eco Prim T Plus typically serves as the critical first step in a Mapei flooring system, applied directly to the prepared substrate before any levelling compounds or cementitious adhesives. Its role is to bridge the gap between diverse base materials and the subsequent layers, ensuring a cohesive and durable bond. In scenarios where a moisture vapour barrier like Primer MF or Mapeproof 1K Turbo has been applied without a sand broadcast, Eco Prim T Plus acts as an intermediate bonding aid, allowing for the application of thin (<10mm) cementitious smoothing compounds directly over the cured barrier.

Choose this when

  • When preparing interior concrete, gypsum, timber, or tiled floors for levelling compounds or cementitious adhesives.
  • When you need a solvent-free primer for both absorbent and non-absorbent interior substrates to ensure reliable adhesion.
  • When environmental considerations are paramount, and a very low VOC primer is required to contribute to Green Star credits.
  • When you need to bond levelling compounds over moisture vapour barriers (like Primer MF or Mapeproof 1K Turbo) that have not been sand broadcast.

Don't use this when

  • Not for: Exterior flooring applications; Eco Prim T Plus is formulated exclusively for interior use.
  • Not for: Magnesium substrates; for these, use Primer EP or Mapeprim SP.
  • Not for: Moisture-unstable wood or substrates exhibiting rising damp; always ensure the timber is stable and there is a vapour barrier if required.

This primer complies with ASTM D 1308-87 for resistance to urine, making it suitable for demanding interior environments where hygiene and durability are critical. Its very low VOC emissions also contribute valuable points towards Green Star credits, aligning with sustainable building practices.

Eco Prim T Plus vs. Eco Prim Grip

Eco Prim T Plus is formulated for superior adhesion on interior flooring applications, specifically designed to prepare a wide range of absorbent and non-absorbent substrates for levelling compounds and cementitious adhesives. For projects that include exterior applications or demand an all-purpose primer with a more aggressive grip for render and plaster over very smooth or low-porosity surfaces, Eco Prim Grip offers a broader application scope.