RockHard Fusion Primer

Rockhard Fusion Primer is a fast-drying adhesion primer with a thin sol-gel base. This can act as an inter-coat adhesion primer or a direct substrate primer. This means that it can be applied to the coat that sits between the substrate and topcoat (or between any two coats) or it can be applied directly to the substrate beneath.

Thanks to its innovative technology, Rockhard Fusion Primer is able to chemically fuse the substrate and topcoat by creating a molecular bridge between the coating and the surface beneath. This very fast-drying primer serves as an adhesion layer between coating and substrate, or between two coatings on surfaces like concrete, wood, aluminium, and more.


    • UV-stable and virtually invisible
    • Removes the need for sanding or mechanic abrasion of substrates or coatings before applying topcoat
    • Provides strong bonding to surfaces that are often hard to bond or have low/no profile
    • 90-minute overcoat window (if the window is missed, run a screen or light abrasion and reapply)
    • Covalent bonding at a molecular level allows the primer to “become one with the surface” it is applied to and creates a superior barrier
    • Can be used on almost any substrate – concrete, steel, stones, tiles, glass
    • Penetrates the surface of the substrate


Rockhard Fusion Primer is compatible with a wide variety of surfaces and chemically compatible with many types of coatings. However, please keep in mind that water-based coatings are not compatible with top coats. When used on concrete, as long as the substrate is clean and free of bond breakers such as oils, greases, etc, no surface profiling is needed to achieve a strong chemical bond to the surface.

Due to the high-VOC contents, gas emissions could affect air quality for indoor applications so be sure to take extra precautions when installing this coating system.

Applications: use on painted or unpainted iron; aluminium, copper, and other metals; hot rolled steel, cold rolled steel, stainless steel; powder coated and galvanized surfaces; concrete, wood, rubber, plastic, fibreglass, and glass.

£250.00 exc. VAT

In stock

Additional information

Weight 3.75 kg


Size: 1 Gallon

Material: Clear to slight straw yellow liquid

Calculation for theoretical coverage: 300 – 400 Ft2 /gal @ Recommended spread rate 4 – 5 mils Wet, 0.4 – 0.9 mils Dry

Mixing: Ready to use. There is no need for mixing or diluting.

VOC Contents: High-VOC Emissions could affect air quality conditions for indoor applications so be sure to take extra precautions when installing this coating system.

Data Sheets

RockHard Fusion Primer TDS

RockHard Fusion Primer SDS

RockHard Fusion Primer Info Sheet

RockHard Fusion Primer Misstep Guide


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Xtreme Polishing Systems offers a wide range of epoxy resin materials which support all projects with surface preparation, concrete floor grinding and polishing machines, decorative concrete, and epoxy resin supplies. Our products are suitable for residential, industrial and commercial floors. We provide a full product line of professional concrete and epoxy supplies, flooring equipment, and building materials for projects big and small. 

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