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A 2-component primer for porous, bare, concrete, sand and cement screeds, bricks and blockwork that is ready to be over coated in only 4 hours.
- For priming bare, porous, or open textured surfaces prior to applying a high build floor finish
- Ready to be over coated in only 4 hours
- Virtually solvent free two pack epoxy resin – safe for use in confined areas
- Binds weak and friable surfaces
- 100% solids epoxy offers major benefits over traditional water-based primers – highly penetrative, exceptional binding and strengthening properties and rapid curing
Note: While great care is taken with the colour samples shown, no guarantee can be given that they represent exactly the colours offered.
Description
Watco 4-Hour Epoxy Primer prevents ‘air entrapment’ bubbles forming when high build coatings are applied to open textured surfaces. It is a highly penetrative, two pack, virtually solvent free primer, especially designed to reduce the porosity of bare, porous, or open textured concrete and high suction floors.
Watco 4-Hour Epoxy Primer also binds together and strengthens weak and friable surfaces ready for painting and it offers significant benefits over traditional water-based primers; not only because of its exceptional binding properties but also how deeply it penetrates into the substrate and how rapidly it cures. This rapid curing, high performance formulation allows the floor to be primed and coated in the same day.
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Features & Benefits
- For priming bare, porous, or open textured surfaces prior to applying a high build floor finish
- Porous, bare, concrete, sand & cement screeds, bricks, and blockwork.
- The moisture content of concrete should be less than 75% RH.
- Ready to be over coated in only 4 hours
- Virtually solvent free two pack epoxy resin – safe for use in confined areas
- Binds weak and friable surfaces
- 100% solids epoxy offers major benefits over traditional water-based primers – highly penetrative, exceptional binding and strengthening properties and rapid curing
Surface Preparation
Bare concrete – remove surface laitance, dust and any light dirt or grease deposits using Watco Etch & Clean. Flush with clean water and allow the surface to dry thoroughly and for as long as possible to allow Watco 4-Hour Epoxy Primer to penetrate. For the removal of heavier deposits of oil and grease we recommend Watco Concroff, again, flush with clean water and allow the surface to dry thoroughly.
New concrete – as a guide, new concrete should be left for eight weeks to dry. The surface should then be prepared using Watco Etch & Clean and thoroughly rinsed away and left to dry prior to using Watco 4-Hour Epoxy Primer.
Mixing
Remove the two inner tins from the tall outer tin. Stir the contents of each tin thoroughly and pour all of the contents into the outer tin (scrape around the inside of the tins to remove any residue). Mix the components together thoroughly using a spatula or similar wide bladed tool (a piece of wooden batten is ideal). Continue mixing until an even colour and consistency are obtained. Do not mix more than one pack at a time. If a paint stirrer fitted to an electric drill is used, also use the spatula to blend in any unmixed material from the sides and bottom of the tin.
Application
Important – once the contents of the pack have been mixed, a chemical reaction takes place which creates heat, and the product should therefore be used immediately.
Best results are obtained in warm (minimum of 15°C), dry conditions with good ventilation. Apply one coat with a medium pile roller, (not foam), working well into the surface of the concrete.
Do not exceed the maximum coverage rate (see section headed ‘Coverage’ for further information).
As a guide, Watco 4-Hour Epoxy Primer can be over coated with a high build coating when it is touch dry (generally 4 – 8 hours) but should be applied within 48 hours. If more than 48 hours elapse, the primer should be lightly abraded to provide a key.
Test Results
- Abrasion Resistance ISO 5470-1 - 147mg
- Flexibility ISO 1519 - 2mm
- Adhesion Test EN 1542 - 2.8MPa/Nmm2
- Water Permeability EN 1062-3
Case Studies
Paradise Wildlife Park, Hertfordshire - primed the surface of their lion enclosure before overcoating with an ultra-hard-wearing topcoat to withstand the wear and tear of the area, whilst also having the ability to tolerate lion urine.
Commercial vehicle servicing and repair company in Cardiff - new floor installed in their workshop, which would inevitably be subject to oil ingress and heavy wear and tear. Initially the surface was primed with 4 Hour Epoxy Primer, then after 24 hours it was given one coat of Epoxicote High Build
Product Details
9131-945991
Data sheet
- Manufacturer
- Watco
- For Use By
- Professional Use
- Interior / Exterior Use
- Interior Use
- Water / Solvent Based
- Solvent
- Application Method
- Medium pile roller
Cut in using a brush - Single, Two or Three Pack
- Two-Pack
- Pack Size
- 5L
- Minimum Applied Thickness
- 250 microns
- Mixing Ratio
- 100 parts resin : 50 parts curing agent.
- Key Features
- Do not apply to a damp surface since 4-Hour Epoxy Primer relies upon penetration.
- Key Features
- Intended for use prior to applying a high build coating. If the top coating is anything other than high build, please contact us for further advice
- Coverage
- Approx. values:
Smooth concrete – 20m2 per 5 litres
Acid etched concrete – 15m2 per 5 litres
Shot blasted/open textured concrete – 12.5m2 per 5 litres - Recommended Thinner/Cleaner
- It is not practical to clean applicators and they should be discarded after use.
- Min. Application Temperature
- Air temperature 15°C
Floor temperature 10°C - Recommended Dry Film Thickness
- 250 microns
- Recommended Wet Film Thickness
- 250 microns
- UN Number (Activator)
- UN2735
- UN Number (Base)
- UN3082
- Pot Life
- Up to 20 minutes at 20°C
Up to 30 minutes at 15°C - Base Type
- Solvent-Based
- Suitable For Use On
- Concrete
- Suitable For Use On
- Brick
- Suitable For Use On
- Floors
- Suitable For Use On
- Blockwork
- Suitable For Use On
- Sand and Cement
- Application Method
- Roller
- Components
- 2K
- Usages
- Quick Drying
- Product Usage Type
- Primer
- Maximum Overcoating Time
- 48 hours
- Minimum Overcoating Time
- 4 hours
- Colour Family
- Clear
- Product Type
- Epoxy
Questions
Question about the product
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IMPORTANT SHIPPING & DELIVERY INFORMATION
Watco 4 Hour Epoxy Primer is only available with the shipping and delivery timescales listed below - please do not contact our Customer Support Team with enquiries about alternative or earlier shipping and delivery times.
Saturdays and Sundays, as well as Bank Holidays, are not classed as working days.
Orders placed after the cut-off for this product will not be processed for earliest dispatch until 9am the next working day.
All delivery costs below are excluding VAT
*All estimates are based on theoretical consumption rates for a single coat and do not take into account any substrate deviations or wastage
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