PC-155 is a moisture tolerant two-component modified Polyamine Adduct Cured clear epoxy designed as a concrete primer to be used under Excel-Crete polymer cement as well as high performance coatings. The low viscosity provides deep penetration into the concrete for excellent surface adhesion.


Excellent adhesion to concrete and masonry surfaces. May be applied to damp or moist surfaces. For use under all epoxy, urethane and acrylic flooring systems. Develops early tack, yet has a long "open time". The special tack helps prevent delamination of toppings and mortars at "bond line". Excellent as a clear concrete sealer by itself. V.O.C. Compliant


Color: Clear Volume Solids: 72-76% Theoretical Coverage: 1,187-sq. ft. per gallon @ 1.0 DFT Recommended Coverage: 150-250 sq. ft. per gallon to yield approx. 5-8 mils DFT Mixing Ratio: 1:1 by volume Pot Life: 20-30 minutes @ 75º F. V.O.C.: = 239 GMS. /L Clean Up: SA-17 or S-74 Shelf Life: 12 months minimum when stored between 50º F- 90º F. Application Temperature: 45º F. to 100º F. Application: Brush, spray or roller Thinner: None Recoat Time @ 75º F.: For 100% solids resins & 100% solids coatings: 1-4 hours. Do not let primer dry when applying 100% solids material. For Solvent Coatings: 6-8 hrs. minimum or overnight, and 24 hours maximum. PC-155 should be DRY before recoating with solvent coating. Do not apply while still tacky. Packaging: 2 gallon kits


For priming concrete surfaces and for bonding monolithic epoxy, urethane or acrylic toppings and coatings. As a sealer coat for new or old concrete surfaces to prevent penetration of water and chemicals. To help eliminate "dusting" of the concrete, spalliing and deterioration. Ideal for warehouse floors, loading docks, shop floors, garages, aircraft hangars, exterior walkways, sumps, tank pads, pump supports, silos, and other concrete surfaces.


Bond Strength: Stronger than concrete which failed first (ACI Test #59-43) Tensile Strength: 3,500 psi per ASTM C190-99 Tensile Elongation: 10% per ASTM D638-60 Water Absorption: 0.3% per ASTM D543-60


Excellent Coatings International recommends four types of surface preparation. Any one of the four surface preparations may be sufficient or a combination of the four may be required depending on the condition of the concrete surface. High Pressure Wet Abrasive Blast Cleaning - All loose and unsound concrete must be mechanically removed down to sound concrete by means of power tool equipment, such as, chipping/scaling hammers, rotary scalers, etc. Acid Etch - Apply Clean & Etch Concrete Acid Solution at a spread rate of approximately 75-150 square feet per gallon. Work the solution into the concrete with a stiff broom or fiber brush. Allow solution to remain on the concrete surface for approximately 10 minutes or until the effervescing and bubbling ceases. Then flush floor thoroughly with clean, fresh water to remove all laitance, dirt, and other foreign materials. Surface shall be allowed to dry completely before coating. NOTE: Do not allow the clean & etch solution to dry on the floor before flushing off because dirt, etc. can be re-deposited into the pores of the concrete. Check pH for a neutral surface condition. Vacuum Blast – All areas of the existing concrete shall be Vacuum Abrasive Blast cleaned using a Wheelabrator Blastrac Shot Blast Machine with Dust Collector. A 6.0 – 10.0 mil anchor profile pattern shall be achieved to provide maximum adhesion of the recommended system. A thorough washing may be necessary prior to blasting to remove all foreign matter. Check with Blastrac Mfg. for proper application procedures. Dry Abrasive Blast – Abrasive blast concrete surface to remove all laitance, loose concrete, coating, sealers, etc. It is necessary to achieve a rough anchor pattern and get to sound concrete. All blast material and foreign matter must be removed before application. New concrete must be cured at least a minimum of 28 days before applying this coating. All laitance, effervescence, chemical contaminants, grease, oil, and other foreign material must be removed. The prepared surface must be clean, dry and structurally sound.


All interior concrete floors are subject to possible moisture vapor emissions, which may cause coating failures. Prior to the application of coatings, Calcium Chloride Testing should be done according to ASTM Standard practice E 1907-97. Test kits are available from Excellent Coatings.


PC-155 is prepared by mixing one part Base (Part A) to one part Hardener (Part B) with mixing attachment. PC-155 should be used immediately with no induction time. Do not thin materials. Use as supplied.


For best results, apply by roller, using a medium nap, phenolic core roller cover. Apply an even, uniformly wet film while working material into surface. Do not allow material to puddle. Spread rate will be approximately 150 to 250 square feet per mixed gallon, depending upon porosity of concrete surface. PC-155 may also be sprayed, but then should be “back-rolled” to produce a uniform coat. For small areas and “cutting in” use a pure bristle brush. Do not apply to surfaces below 45º F or above 100ºF. For safety and product curing, proper ventilation is necessary throughout application and cure. When using pigmented finish coats, be sure the batch numbers are all the same to provide a uniform color. Do not apply if the surface is within 5º of the Dew Point. PC-155 Base and Hardener should be stored at 75º-85ºF to help maintain a lower, rollable viscosity. Do not apply when material is cold.


When used as a primer for solvent coatings, PC-155 must be dry. Under the same conditions this will be 6-8 hours minimum and 24 hours maximum. If the re-coat time is in excess of 24 hours, sanding with 80-100 grit open paper is required. Then another coat of PC-155 Primer should be applied.


As a primer for acrylic polymer cements, PC-155 should be top-coated while slightly tacky. This will be from 1-6 hours at 75ºF when the PC-155 is applied at a rate of 150-250 square feet per gallon.


PC-155 is flammable. Keep away from all sources of ignition during storage, mixing, application and cure. The Hardener (Part B) either alone or when mixed with Base (Part A) can cause eye and skin burns as well as allergic reactions. When spraying, the use of goggles, fresh air masks or NIOSH approved respirators, protective skin cream, and protective clothing is recommended as a standard practice.


Store Excel-Coat products in a cool, dry area and protect from freezing. It may be necessary to stir Excel-Coat products before using. Dispose of empty containers properly according to current Local, State and Federal regulations.


Use Excel-Coat products with adequate ventilation and personal protection. Users must read container label and Safety Data Sheet (SDS) for specific health and safety precautions prior to use.


Immediately available from Excellent Coatings International and authorized distributors.


Cost data is available from Excellent Coatings International or their authorized representative. For the name and number of the nearest local representative, call Excellent Coatings International at (800) 473-3817.


Excellent Coatings Inc. warrants Excel-Coat material to be free of defects and manufactured to meet published physical properties for a period of one year following the date of shipment, provided that the product has been applied according to the manufacturer's instructions. Under this warranty, Excellent Coatings Inc. will provide, at no charge, product in containers to replace any product proved to be defective in applications recommended by us as suitable for this product. All claims concerning the product's defects must be made within twelve months of shipment and within thirty days of discovery. Absence of such claims in writing during this period will constitute a waiver of all claims with respect to such product. This warranty is IN LIEU OF any and all other warranties, expressed or implied, including, but not limited to, any implied warranty of MERCHANTABILITY of fitness for a specific purpose.


Authorized local representatives are available to provide design assistance and on-site instructions for our products. Excellent Coatings International provides assistance in design and development of special applications as well as full or part time inspections. Part-time and full-time inspections and instruction are available on a fee basis upon arrangement. Technical data is available upon request.