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Floor Primers

Download Technical Data Sheet Download Health And Safety Sheet - Base Download Health And Safety Sheet - Activator
Rust-Oleum Epoxy Floor Primer Rapid 5421 is a rapid curing 2-component solvent-free epoxy impregnation primer for concrete floors. 

Main Properties

Excellent penetration
Binds weak and friable surfaces
Recoating time of only 4 hours allows application of primer and topcoat in one day
High layer thickness is ideal for uneven surfaces. 

Recommended Uses 

New or untreated porous mineral surfaces, like concrete. Can be used in combination with all Rust-Oleum or Mathys epoxy and polyurethane coatings. Recoating time of only 4 hours


Theoretical: 10 m²/l at 100 μm dry 
Practical: Practical coverage depends on many factors such as porosity and roughness of the substrate and material losses during application.

Surface Preparation

New concrete should cure and dry for at least 30 days prior to the application of the product. 
Remove oil, grease and all other surface contaminations by alkaline or high pressure (steam) cleaning in combination with appropriate detergents. Remove all laitance, loose or unsound 
concrete by vacuum-blasting or etching with Rust-Oleum Surfa-Etch 108 Etching Solution. 
Remove concrete curing compounds completely. Large surfaces should preferably be prepared by abrasive blasting (vacuum blasting) or flame cleaning. Profile maximum 0.5 mm. 

Please read data sheets carefully prior to application.

Please note that delivery lead times for this item may vary. Please feel free to contact the office on 01934 825850 for a confirmed delivery date prior to ordering.

5421 Epoxy Floor Primer Rapid

Rapid curing impregnation primer for floors

Overcoatable after just 4 hours: apply primer and topcoat in one day!

Improves adhesion on brittle and porous surfaces

100% solids

Low odour

2 components (base and activator) in 1 can


Please select a colour to see size/pack options:


Please note that the colour swatches above are representative only. This product's actual colour may differ. For further details please contact us.



Price: £134.95

£161.94 incl VAT

Disclaimer: All products purchased via this website must be used in conjunction with the product data information provided.
Roadcraft Safety Products Ltd cannnot be held responsible for any performance failures where mixing or application instructions have not been adhered to.