RonaFloor Epoxy Primer MT is a two pack solvent free primer for application to surface damp or porous concrete and screeded substrates. Typically used to prime concrete before application of RonaScreed self smoothing cementitious screeds, for excellent adhesion and minimal pin holing from porous substrates.

May be applied to shot/ grit blasted steel before application of Ronafix polymer modified screeds to stair pans and other applications where deflection of steel is minimal.

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• Features & Benefits
• Substrate Preparation
• Application Conditions
• Mixing
• Application
• Cleaning

Features & Benefits

• Two pack primer
• Use before application of RonaScreed self smoothing screed for reduced pin-holing and superior adhesion
• Good adhesion to shot/ grit blasted steel
• Use before bonding of Ronafix screeds to steel substrates, such as stair pans
• Moisture tolerant, can be applied to surface damp concrete and screeds
• Use before application of RonaDeck Resin Bonded Surfacing to porous or surface damp concrete
• Easy to apply
• Solvent free and low odour
• 30 minutes pot life
• Can be overcoated after 24 hours with flooring

Substrate Preparation

To achieve optimal adhesion it is essential that RonaFloor Epoxy Primer MT is applied to structurally sound, clean and touch dry substrates.

Surfaces must be prepared after making good any defects in the floor, ensuring that friable materials are removed and replaced (for fast cure repairs refer to RonaFloor Repair 1 Hour data sheets).

Concrete must be prepared by captive shot blasting or similar method to produce lightly textured, laitance free surfaces. Steel must be shot/ grit blasted to SA 2.5.

Substrates must be cleaned to remove grease, oil and dirt. Substrates must be allowed to dry after washing. Substrates must be vacuum cleaned, to remove shot and other loose materials.

Application Conditions

The workability and application characteristics of RonaFloor Epoxy Primer MT are adversely affected by low temperature; viscosity and curing time will increase. Therefore the material should ideally be stored, mixed and applied at 15°C to 20°C.

At lower application temperatures the material should be stored at or warmed to 15°C to 20°C prior to use. Application characteristics are severely affected below 10°C, minimum application temperature is 5°C.

Mixing

Add the full contents of the B component to the full contents of the A component and mix with a slow speed drill and spiral mixing paddle (MR3 type) for approximately 3-4 minutes.

Transfer to a shallow paint tray immediately after mixing, or pour onto the floor, to control exothermic reaction and extend working time. Material must never be taken directly from the mixing vessel, to avoid the risk of unmixed material being used.

Application

1. Apply RonaFloor Epoxy Primer MT by short or medium nap lambswool or mohair roller at the stated coverage
2. Broadcast 0.8-1.7mm kiln-dried sand or similar to refusal into the wet resin, a finer grade may be required for vertical application or for coatings
3. Allow to cure for approximately 24 hours at 20°C
4. Vacuum excess sand and protect until the screed or coating is applied

Cleaning

Clean tools immediately with xylene based solvent or RonaDeck Low VOC Cleaner.