Prime-Crete PC-155 Clear Epoxy Damp Concrete Primer

PC-155 is a moisture tolerant two component modified Polyamine Adduct Cured Clear Epoxy designed as a concrete primer to be used under our epoxy grouts, mortars, toppings, high performance coatings and lining systems. The low viscosity provides deep penetration into the concrete for excellent surface adhesion.

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SKU: PC-155 Category:
1. Excellent adhesion to concrete and masonry surfaces
2. May be applied to damp or moist surfaces
3. For use under all our epoxy flooring systems
4. Develops early tack, yet has long a “open time” for 100% Solids Epoxy systems
5. The special tack helps prevent delamination of toppings and mortars at “bond line”
6. Excellent as a clear concrete sealer by itself
7. V.O.C. Compliant
Volume Solids74% 2%
Theoretical Coverage (per gallon at 1.0 DFT.)1187 ft
Recommended Coverage150 – 250 sq. ft per gal to yield approx. 5 – 8 mils DFT
Mixing Ratio1:1 by volume
Pot Life20 – 30 minutes at 75 F
ApplicationBrush, spray, or roller
Application Temperature45 to 100 F
Recoat Time @ 75 F (For 100% Solids Resins & 100% Solids Coatings)1 – 4 hours. Do not let primer dry when applying 100% solids material
Recoat Time @ 75 F (For Solvent Coating)6 – 8 hrs. minimum, or overnight, and 24 hours maximum. PC-155 should be DRY before recoating with a solvent coating. Do not apply while still tacky.
Clean UpS-74
Packaging10 gal kits
2 gal.
V.O.C239 GMS/Liter
For priming concrete surfaces, for bonding monolithic epoxy grouts, mortars and toppings such as PC-1000, PC-1100, PC-1175, PC-1405, PC-1500, PC-1800, PC-1850, CF-613, etc.

As primer on concrete under high performance coatings and linings, such as CM-15, PC-500, PC-517, PC-555, etc.

As a sealer coat for new or old concrete surfaces to prevent penetration of water and chemicals.

To help eliminate “Dusting” of the concrete, spalling and deterioration.

As an interface adhesive bonding agent to insure adhesion of new concrete to old concrete.

Ideal for warehouse floors, loading docks, shop floors, garages, aircraft hangars, exterior walkways, sumps, tank pads, pump supports, silos, and other concrete surfaces. Can be made into a non-skid finish.

Physical Properties
Bond Strength : Stronger than concrete which failed first (ACI Test 59-43)
Tensile Elongation : 10% per ASTM D638-60
Tensile Strength : 3500 psi per ASTM C190-99
Water Absorption : 0.3% per ASTM D543-60
Surface Preparation
Gulf Coast Paint Mfg., Inc. 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.

1. 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.

High pressure water blast with sand injection all surfaces to remove all laitance, contaminants, and other foreign deposits to provide a sound, clean surface. Use clean, dry air to blow these areas and to remove excessive moisture.

2. Acid Etch
Apply Gulf Coast Paint’s 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.

NOTE: Do not allow the Clean & Etch solution to dry on the floor before flushing off because dirt, etc., can be redeposited in the pores of the concrete.

3. 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 proper 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 shot and application procedures.

4. 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.

In all cases of surface preparation, the pH should be checked. A final pH between 7.0 and 8.5 is acceptable. Also, a “Water Dissipation Test” should be made on random areas of the floor. A “Vapor Barrier Test” should also be run on the concrete. Consult Gulf Coast Paint Mfg. for specifics on testing.

New concrete must be cured at least a minimum of 28 days before applying a coating. All laitance, efflorescence, chemical contaminants, grease, oil, and other foreign material must be removed. The prepared surface must be clean, dry and structurally sound.

Mixing Instructions, Application Procedure & Recoat Time
Mixing Instructions
PC-155 is prepared by mixing 1 part Base (Part A) to 1 part Hardener (Part B) with an explosive proof variable speed drill with a Jiffy mixer. PC-155 should be used without any induction time. Do not thin, use as supplied.Application Procedure
For best results, apply by roller, using a medium nap, phenolic core roller cover. Apply an even, uniform, wet film while working material into surface. Do not allow material to puddle. Spread rate will be approximately 150 to 250 sq. ft. 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 pure bristle brush. Do not apply to surfaces below 45 F or above 100 F.

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 temperature is within 5 of the Dew Point. PC-155 Base and Hardener should be stored at 75 F-85 F to help maintain a lower, reliable viscosity. Do not apply when material is cold. Allow a minimum of 72 hours with good ventilation before putting floor back into service. If a non-skid finish is required, prepare a test patch for owner approval prior to application.

These systems are designed for application by professional experienced flooring contractors.

Recoat Time
As a primer for epoxy mortars, toppings and 100% solids resins and 100% solids coatings, PC-155 should be topcoated while still tacky. This will be 1-4 hours at 75 F when the PC-155 is applied at a rate of 150-250 sq. ft. per gallon.

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 recoat 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.

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.

This product is sold without warranty as to performance expressed or implied. Users are urged to make their own tests to determine the suitability for their particular conditions.

PC-155 is for professional only.
Keep Away from Children.

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