FOX EPOTHANE® PRIMER SL is an epoxy-based, two-component, low-viscosity, solvent-based, transparent primer set. It provides strong adhesion and excellent surface preparation prior to epoxy and polyurethane floor coatings on non-porous or highly porous concrete surfaces, asphalt and bitumen membrane surfaces.

Colour Palette

Transparent, Yellowish

Packaging

19 kg
TDS

Product Description

FOX EPOTHANE® PRIMER SL is an epoxy-based, two-component, low-viscosity, solvent-based, transparent primer set. It is used as a primer on non-porous concrete and non-absorbent surfaces, highly porous substrates, and asphalt and bitumen membrane surfaces. It is applied as a primer coat beneath epoxy and polyurethane coatings, including FOX EPOTHANE® series epoxy floor coatings, FOX PURATHANE® series polyurethane floor coatings, and FOX PURMAX® series polyurethane waterproofing coatings. With its high chemical and mechanical resistance, excellent surface adhesion and low viscosity, it is an indispensable surface preparation product for floor coating systems. The total solids content is 100% and it must not be thinned. At +23°C and 50% relative humidity, the product offers a pot life of 35–40 minutes and a curing time of 12–24 hours.

Advantages

  • Suitable for interior and exterior use.
  • Can accept a high proportion of fillers.
  • Offers high chemical and mechanical resistance.
  • Easy to apply.
  • Excellent surface adhesion.
  • Liquid-impermeable.
  • Non-slip surface can be achieved.
  • Low viscosity.
  • High bond strength.
PropertyValue
Density1,05 ±0,05 gr/cm³
ColourTransparent, Yellowish
Compressive Strength (7 days)~95 N/mm²
Flexural Tensile Strength (7 days)~30 N/mm²
Bond Strength (to Concrete)≥2 N/mm²
Total Solids Content%100
ThinningCannot be thinned
Application Substrate Temperature+10°C / +30°C
Shore D Hardness84
Curing Time12-24 hours
Pot Life (+23°C, 50% humidity)35-40 minutes
Pot Life (+10°C)50 minutes
Pot Life (+20°C)35 minutes
Pot Life (+30°C)12 minutes
Recoat Time (+10°C)Min. 24 - Max. 35 hours
Recoat Time (+20°C)Min. 12 - Max. 18 hours
Recoat Time (+30°C)Min. 7 - Max. 10 hours
Foot Traffic (+10°C)30 hours
Foot Traffic (+20°C)15 hours
Foot Traffic (+30°C)8 hours
Light Traffic (+10°C)3 days
Light Traffic (+20°C)2 days
Light Traffic (+30°C)1 day
Full Cure7 days
Storage Temperature+5°C / +30°C

Usage Areas

  • As a primer on non-porous concrete and non-absorbent surfaces
  • As a primer on highly porous substrates
  • As a primer on asphalt and bitumen membrane surfaces
  • As a primer prior to epoxy and polyurethane coatings
  • As a primer beneath FOX EPOTHANE® series epoxy floor coatings
  • As a primer beneath FOX PURATHANE® series polyurethane floor coatings
  • As a primer beneath FOX PURMAX® series polyurethane waterproofing coatings

Application Steps

  1. 1

    Surface Preparation

    The concrete substrates to be coated must be prepared using abrasive equipment such as shot blasting, milling or diamond grinding to remove the cement laitance. Weak concrete fragments must be removed, and small voids and holes must be fully opened. The resulting dust must be cleaned with an industrial vacuum. For floor repair and void filling, a mortar obtained by mixing FOX EPOTHANE® PRIMER with 60–70 AFS (0.1–0.3 mm) quartz sand should be used.

  2. 2

    Checking Application Conditions

    The surface moisture content must be below 4% (tested by CM measurement or oven-drying method). There must be no rising moisture according to ASTM (polyethylene sheet test). Relative air humidity must not exceed 80%. The substrate temperature must be at least +3°C above the dew point. Surface, ambient and material temperatures must be between a minimum of +10°C and a maximum of +30°C.

  3. 3

    Mixing

    Verify that product temperatures are between +10°C and +30°C. Component A (FOX EPOTHANE® PRIMER SL) is mixed for 1 minute with an electric mixer at 300–400 rpm without entraining air. Component B is then poured onto Component A and mixed continuously for 2 minutes until a homogeneous mixture is obtained. Excessive mixing should be avoided to minimise air entrainment.

  4. 4

    Application as a Primer

    FOX EPOTHANE® PRIMER SL is applied to the surface void-free using a roller, trowel or zero-notch squeegee. If the product has been absorbed into the surface, the primer application must be repeated.

  5. 5

    Application as a Surface Levelling Primer

    On highly porous concrete substrates, FOX EPOTHANE® PRIMER SL is applied as the first coat using a roller, trowel or zero-notch squeegee. After the primer has dried, a mixture of FOX EPOTHANE® PRIMER and 60–70 AFS (0.1–0.3 mm) silica sand is applied as a skim coat with a zero-notch squeegee at the required thickness depending on surface roughness.

  6. 6

    Tool Cleaning

    Tools and equipment used after application must be cleaned with solvent. Once FOX EPOTHANE® PRIMER SL has cured, it can only be removed from the surface by mechanical means.

Critical

The surface temperature during application must be between a minimum of +10°C and a maximum of +30°C. Application must not be carried out outside this range.

Critical

The surface moisture content must be below 4%. Rising moisture must not be present according to the ASTM polyethylene sheet test.

Critical

After application is complete, the coating must be protected from direct water contact for at least 24 hours. In the event of water contact, softening and blistering may occur on the coating; in this case the coating must be completely removed and reapplied.

Critical

Mixing must be carried out with an electric mixer at 300–400 rpm using the specified epoxy/polyurethane resin mixing paddle. Otherwise, air bubbles will form in the coating.

Important

Concrete surfaces to be coated with epoxy/polyurethane must be at least 3 weeks old prior to application. A vapour barrier layer must be provided for slabs laid on ground.

Important

Attention must be paid to dew point and condensation. The substrate temperature must be at least +3°C above the dew point.

Important

Relative air humidity must not exceed 80%.

Important

Materials to be used should be brought to the application site 1–2 days in advance and allowed to acclimatise to ambient conditions. In cold weather, packaging should be conditioned at +20°C – +25°C before use.

Important

Rain, dust, wind, animals and insects must be prevented from entering the building while the coating is still fresh.

Information

Once FOX EPOTHANE® PRIMER SL has cured, it can only be removed from the surface by mechanical means; tool cleaning after application must be carried out with solvent.

Critical

Open flames near storage and application areas are dangerous; these areas must be ventilated. Protective clothing, gloves, goggles and a mask must be worn during application. Contact with skin and eyes must be avoided; in case of contact, wash thoroughly with plenty of water and soap. In case of ingestion, seek medical attention immediately.

Important

The product must be stored between +5°C and +30°C, away from direct sunlight, in a cool and dry environment. Shelf life is 12 months from the date of manufacture.

Information

Consumption figures are given for ideal conditions assuming an ambient and surface temperature of 20°C. It should be noted that consumption will increase on uneven surfaces and in cold weather conditions.