Fortis PAP improves the bond of polyurethane adhesives and coatings to difficult concrete, masonry, glass and other siliceous surfaces. This easy-to-apply single-component treatment is ideal where additional substrate adhesion is required before application of a compatible polyurethane system.
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FORTIS PAP is a specialist single-component adhesion promoter designed to improve bonding to difficult concrete, high-quartz and other cementitious or siliceous substrates.
Some dense or high-quartz concrete surfaces can be difficult for polyurethane coatings and adhesives to bond to reliably. PAP provides an adhesion-promoting treatment between the correctly prepared substrate and compatible polyurethane systems.
The low-viscosity formulation wets properly prepared mineral surfaces and provides additional bonding performance where conventional mechanical preparation alone may not provide the required adhesion.
Fortis PAP is particularly useful on high-quartz aggregate concrete, masonry and other difficult siliceous substrates. It can be applied by brush, roller or low-pressure spray before application of compatible Fortis polyurethane coatings or adhesives.
PAP is an adhesion promoter rather than a high-build coating or conventional film-forming concrete primer. Correct mechanical surface preparation remains essential before application.
Single-Component Adhesion Promoter
Preparation: Surfaces must be correctly prepared, clean, dry and free from dust, oil, grease, grinding residue and other contaminants that may interfere with adhesion.
Application: Apply Fortis PAP by brush, roller or low-pressure spray. Apply a thin, even coat sufficient to wet the prepared surface without flooding or puddling.
For roller application, use a suitable mohair roller. For brush application, use a high-quality wide brush and distribute the material evenly across the substrate.
Coverage: Typical coverage is approximately 10–20 m²/L depending on substrate porosity, surface profile and application method.
Drying: PAP is typically touch dry after approximately 2 hours.
Overcoating: Apply the compatible polyurethane coating or adhesive after a minimum of 4 hours and within a maximum of 24 hours.
Do not apply excessive material or allow PAP to flood or puddle on the surface.
High-Quartz Concrete: Fortis PAP is particularly recommended where high quartz or siliceous aggregate makes adhesion difficult. Mechanically prepare the surface before applying PAP.
Concrete: Concrete must be sound, clean, dry and free from laitance, curing compounds, oil, grease, dust and other contaminants. Diamond grinding is recommended for most flooring applications.
New Concrete: New concrete should be allowed to cure for a minimum of 28 days before preparation and application.
Masonry & Cementitious Surfaces: PAP can be used on compatible prepared masonry and other cementitious or siliceous substrates where improved polyurethane adhesion is required.
Existing Surfaces: Existing surfaces must be mechanically prepared and all contamination removed. Always confirm suitability and adhesion on a representative test area before proceeding.
For unusual substrates or applications, contact Fortis for technical advice before application.
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An adhesion promoter is applied to a correctly prepared substrate to improve bonding of a compatible coating or adhesive. Fortis PAP is designed for difficult cementitious and siliceous surfaces used with compatible polyurethane systems.
Use PAP where additional adhesion is required, particularly on dense, high-quartz or difficult siliceous concrete before application of compatible polyurethane coatings or adhesives.
PAP is a specialist adhesion promoter rather than a conventional high-build concrete primer. It is applied as a thin treatment to improve bonding to difficult substrates.
Yes. PAP does not replace correct surface preparation. Concrete should be mechanically prepared, with diamond grinding recommended for most flooring applications.
Yes. High-quartz and siliceous concrete is a key application for Fortis PAP where additional polyurethane adhesion is required.
Apply PAP in a thin, even coat by brush, mohair roller or low-pressure spray. Avoid flooding or allowing the material to puddle.
Apply the compatible polyurethane coating or adhesive after a minimum of 4 hours and within a maximum of 24 hours.
Typical coverage is approximately 10–20 m²/L depending on substrate porosity, surface profile and application method.
Fortis Adhesion Promoter Technical Data Sheet
Fortis Adhesion Promoter Safety Data Sheet
