Installing Concrete Sealers / Topcoats — Epoxy, Polyurethane, Acrylic & Polyaspartic Coatings

Information & Preparation

these installation instructions are for use with the following products:

• Perdüre E02, 100% solids epoxy primer
• Perdüre E32, Water emulsion primer
• Perdüre E20, 100% solids epoxy bodycoat
• Endüra E21, 100% solids epoxy primer/bodycoat
• Perdüre NE25, Chemical resistant coating
• Perdüre NE30, Novolac epoxy coating
• Perdüre U45, Matte water based polyurethane topcoat
• Perdüre U46, Gloss water based polyurethane topcoat
• Perdüre U50, Solvent based polyurethane topcoat
• Perdüre U90, Moisture cured polyurethane topcoat
• Perdüre P70, Polyaspartic polyurea coating
• Perdüre A01, Solvent based acrylic sealer
• Perdüre A03, Water based acrylic sealer

general information

Düraamen Epoxy, Polyurethane and Polyaspartic coatings are high performance coating systems that provide protection against dirt and chemical penetration to concrete floors. They are available in various performance levels. Contact your Düraamen Representative for assistance with proper material choice for specific performance criteria.

surface preparation

Surface Preparation is the most critical portion of any successful resinous flooring system application. All substrates must be properly prepared as outlined in Düraamen’s Technical Bulletin 1. Specific attention should be paid to the following:

• Concrete placement
• Curing and finishing techniques of the concrete substrate
• Age of concrete
• Previous contamination of the substrate
• Present condition of the substrate
• Surface profile required for the system (ICRI CSP 2-5 is typical, varies by system)

Also, the temperature and humidity conditions of the area to receive the flooring system should be checked. An optimum room temperature of 75°F with a minimum slab temperature of 50°F is required for proper cure of the resin flooring system.

Installation over existing resin coatings: The existing resin flooring or coating must have acceptable adhesion to the substrate and have similar physical properties to the new coating (e.g., epoxy over epoxy, urethane over epoxy/urethane, acrylic over acrylic, etc.). The hardness and physical condition of the existing coating will dictate the required surface preparation. Harder resins will require more extensive sanding or may require diamond grinding. The surface must be thoroughly cleaned of any dirt, oil or other contaminates, followed with aggressive sanding/grinding using 60-80 mesh sand paper, abrasive screen or diamonds. Vacuum and damp mop any dust. The goal is to impart a textured profile in the existing coating or floor system to provide a mechanical bond for the new resin application. Cracks and divots should be routed or chipped out and filled with epoxy resin. Acrylic coatings on exterior decks applied to a textured surface can not be sanded without removing the texture, pressure washing and solvent wiping may be the only viable option. The intercoat adhesion of acrylic coatings is not ideal even with sanding, which will dictate that more frequent reapplications be done in the future. Once every year or two is typical.

material quantities

Düraamen’s Epoxy, Urethane (Polyurethane) and Polyaspartic Coating coverages and number of coats depend upon desired film thickness. Typical coverage rates for a single coat are outlined below.

• Perdüre E02, 100% Solids Epoxy Primer 250-300ft²/gallon 4-5 mils DFT
• Perdüre E32, Water based Epoxy Emulsion 300-350ft²/gallon 2-3 mils DFT
• Perdüre E20 100% Solids Epoxy Coating 100-160 ft²/gallon 10-15 mils DFT
• Endüra E21 100% Solids Epoxy Primer/Coating 100-250 ft²/gallon 6-15 mils DFT
• Perdüre NE25 Chemical Resistant Coating 100-160 ft²/gallon 10-15 mils DFT
• Perdüre NE30 Epoxy Novolac Coating 100-160 ft²/gallon 10-15 mils DFT
• Perdüre NE33 Epoxy Novolac Coating 100-160 ft²/gallon 10-15 mils DFT
• Perdüre U50 (clear/pigmented) Urethane Coating 250-300 ft²/gallon 3-4 mils DFT
• Perdüre U45 (clear/pig.) Water-Based Urethane Coating 300-350 ft²/gallon 2 mils DFT
• Perdüre U46 (clear/pig.) Water-Based Urethane Coating 300-350 ft²/gallon 2 mils DFT
• Perdüre U90 (clear/pigmented) Urethane Coating 450-500 ft²/gallon 3 mils DFT
• Perdüre P70 (clear/pig.) Polyaspartic Polyurea Coating 100-160 ft²/gallon 8-15 mils DFT
  (Perdüre P70 may be applied at less thickness if thinned 10%-20% with MEK)
• Perdüre A01(clear) Acrylic Sealer 250-300 ft²/gallon 0.5-1.5 mils DFT
• Perdüre A03 (clear) Acrylic Sealer 300-400 ft²/gallon 0.5-1 mil DFT

Part 2 – Priming

Düraamen Engineered Products recommends that every flooring system be installed with a primer to ensure maximum adhesion to the prepared substrate. Priming will also help to seal air in the concrete and prevent outgassing and air bubbling in the finished system. Either Perdüre E02, 100% solids Epoxy Primer/Low Modulus Binder, Endüra E21, Epoxy Primer/Coating, or Perdüre E32, Water Emulsion Primer can be used. Perdüre MVT or Perdüre MVT+ may be used if the moisture vapor emission rate exceeds maximum limits (refer to Technical Bulletin 1 ). Contact Düraamen Company for details.

using perdüre e02 primer/low-modulus binder

mixing

1. Stir each component prior to mixing.
2. Mix two (2) parts by volume of Part A (Resin) with one (1) part by volume of Part B (Hardener) for three minutes with a low speed electric drill mixing paddle.
3. If thinning is desired, add no more than one pint of xylene or MEK per gallon of epoxy at time of mixing.
4. Do not mix more material than can be immediately poured out in ribbons and spread/backrolled within 30 minutes. Do not leave mixed material in the pail for longer than 5-10 minutes or working time will be significantly reduced!

application

1. a. Pour mixed resin onto the prepared concrete.
2. b. Spread with either a flat trowel or squeegee to a coverage of 250 to 275 ft² per gallon.
3. c. Back roll with a short nap roller.
4. d. Allow primer to cure 10-12 hours (at 75 degrees F) prior to topcoating. A fast cure formulation is available to reduce re-coat window to 4-8 hours. If primer is to be allowed to sit for longer than 24 hours, broadcast lightly with dry silica sand.

using endüra e21 primer/coating

mixing

1. Stir each component prior to mixing.
2. Mix four (4) parts by volume of Part A (Resin) with one (1) part by volume of Part B (Hardener) for three minutes with a low speed electric drill mixing paddle.
3. If thinning is desired, add no more than one pint of xylene or MEK per gallon of epoxy at time of mixing.
4. Do not mix more material than can be immediately poured out and spread/backrolled in 30 minutes. Do not leave mixed material in the pail for longer than 5-10 minutes or working time will be significantly reduced!

application

1. Pour mixed resin onto the prepared concrete.
2. Spread with either a flat trowel or squeegee to a coverage of 250 to 275 ft² per gallon when using as primer.
3. Back roll with a short nap roller.
4. Allow primer to cure 12-16 hours prior to re-coating. A fast cure formulation is available to reduce re-coat window to 8-10 hours. If primer is to be allowed to sit for longer than 24 hours, broadcast lightly with dry silica sand.

using perdure e32 water-based emulsion primer – use two coats for maximum reduction of outgassing.

mixing

1. Stir each component prior to mixing.
2. Mix two (2) parts by volume of Part A (Resin) with one (1) part by volume of Part B (Hardener) for three minutes with a low speed electric drill mixing paddle.
3. Allow 30 minutes for induction before applying

application

1. Apply using a short nap roller at a spread rate of not less than 300 ft² per gallon.
2. As water leaves the system, the coating will become clear. Do not allow thick applications or puddles where coating remains white.
3. When surface becomes clear, the second coat may be applied (this will be one to four hours depending on flow of air and temperature).Apply topcoat(s) in timeframe stated in the product data sheet.

To Use Perdüre MVT Moisture Vapor Control Primer or Perdüre UMC – Consult with Duraamen Technical Services for best practices.

Part 3 – Application

epoxy, polyurethane, polyaspartic, acrylic coatings

Note on Creating Texture: Non-Skid Additive (80/100 mesh or 20/30 mesh) or White Aluminum Oxide (80 mesh or 240 mesh) may be blended with the epoxy, Polyurethane, Polyaspartic or Acrylic resin used for the final topcoat to create a textured finish. Even if non-slip texture is not needed, a very light texture is recommended to improve the overall appearance. Typical mix design ranges from 3-12 ounces by volume per mixed gallon of resin depending on coating film thickness and texture desired. Experiment with samples to confirm the texture you want to achieve. When using the aluminum oxide, be sure to keep the grit periodically stirred up in the resin unless all of the resin is poured out immediately. You may also lightly broadcast the grit into the final topcoat and backroll it, but be carefull to maintain a very consistent procedure or the texture will vary significantly. Consult with Düraamen Technical Services for additional recommendations.