Page 184 - Polycoat 1.1 Table of Contents

Coverage Clean and degrease any contaminated surfaces before
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Polyeuro 7502 may be applied at any rate to achieve desired priming. Do not blast galvanized surfaces with an abrasive
thickness. Theoretical coverage for 1 mil (0.254 microns) grit. An adhesion test is recommended prior to starting the
thickness is one gallon per 1600 sqft (3.78 liters per 149 sqm). project.
Estimating Formula: (1600 sqft per gal /Dry Mil Thickness) x
Solids Content = Application Rate per gallon FIBERGLASS REINFORCED PLASTIC
The gel coat should be lightly blasted or sanded with 80 grit
Surface Preparation sandpaper and cleaned.
In general, coating performance and adhesion are directly
proportional to surface preparation. Most failures in the PLASTIC FOAMS
Enhanced adhesion is obtained when the foam is mechanically
performance of surface coatings can be attributed to poor abraded. When coating polystyrene, do not use a solvent-
surface preparation. Polyurea coatings rely on the structural based primer.
strength of the substrate to which they are applied. All surfaces
must be free of dust, dirt, oil, grease, rust, corrosion and other TEXTILES, CANVAS, FABRICS
contaminants. When coating previously used substrates, it is Adhesion to most fabrics, geothermal membranes and textiles
important to consider the possibility of substrate absorption, does not require a primer.
which may affect the adhesion of the coating system,
regardless of the surface preparation. Polycoat recognizes STAINLESS STEEL
the potential for unique substrates from one project to another. Stainless steel may be grit blasted and degreased before
The following information is for general reference. For project- priming. Some stainless steel alloys are so inert that it is not
specific questions, contact Polycoat. possible to achieve a satisfactory bond. An adhesion test is
recommended prior to starting the project.
NEW AND OLD CONCRETE
Refer to SSPC-SP13/NACE 6, or ICRI 03732: CSP 3-5. New NEW AND OLD CAST IRON
concrete must be cured for 28 days prior to product application. Blast with a steel grit and degrease before priming. Old cast
Surface must be clean, dry, sound and offer sufficient profile iron is difficult to prepare for a satisfactory bond. It can absorb
for product adhesion. Remove all dust, dirt, oil, form release oil and water soluble contaminants that will keep returning
agents, curing compounds, salts, efflorescence, laitance and to the surface after the coating system has been applied
other foreign matter by shotblasting and/or suitable chemical and affect the coating system adhesion. An adhesion test is
means, in accordance with local chemical regulations. Rinse recommended prior to starting the project.
thoroughly, to achieve a pH between 8.0 and 11.0. Allow to dry ALL OTHER SURFACES
completely. If old concrete has a surface that has deteriorated An adhesion test is recommended prior to starting the project.
to an unacceptably rough surface, PC-260 or a mixture of
Polyprime 21 and sand should be used as a repair agent Mixing
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for cracks, spalls, bug holes and voids. Upon full cure of the Polyeuro 7502 may NOT be diluted under any circumstances.
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repair agent, prime the entire surface intended for coating. Thoroughly mix Polyeuro 7502 Side-B (Resin side) with air
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driven power equipment until a homogeneous mixture and
CONCRETE SURFACE PREPARATION REFERENCE color is attained.
ASTM D4258 - Standard practice for cleaning concrete. ASTM
D4259 - Standard practice for abrading concrete. ASTM D4260 - Application
Standard practice for etching concrete. ASTM F1869 - Standard Both Side-A and Side-B materials should be preconditioned to
test method for measuring moisture vapor emission rate of 75-80°F (24-27°C) before application. Recommended surface
concrete. ICRI 03732 - Concrete surface preparation. temperature must be at least 5°F (3°C) above the dew point.
Polyeuro 7502 should be applied using a plural component,
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WOOD heated, high pressure 1:1 spray mixing equipment like Graco’s
All wood should be clean, dry and free of any knots, splinters, Reactor, Glass Craft or other equivalent machine may be used.
oil, grease or other contaminants. Splintered or rough areas Both Side-A and Side-B materials should be sprayed at a
should be sanded. Knots should be repaired using PC-260 minimum of 2000 psi and at temperatures above 150°F (66°C).
with sand. Upon full cure of the repair agent, prime the entire Adequate pressure and temperature should be maintained
surface intended for coating.
at all times. Polyeuro 7502 should be sprayed in smooth,
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STEEL (ATMOSPHERIC AND IMMERSION EXPOSURE) multidirectional passes to improve uniform thickness and
Remove all oil, grease, weld spatters and round off any sharp appearance.
edges from surface. Minimum surface preparation is Near Storage
White Metal Blast Cleaning per SSPC-SP10/NACE 2. Optimum Polyeuro 7502 has a shelf life of 1 year from date of
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surface profile is 2-3 mils. Prime and shoot Polyeuro on to manufacture in original, factory-sealed containers when stored
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any bare metal the same day as it is cleaned to minimize any indoors at a temperature between 60-95°F (15-35°C).Side-A
potential flash rusting. and Side-B drums are recommended to be stored above 60°F
ALUMINUM (15°C). Avoid freezing temperatures. Store drums on wooden
Aluminum should be blasted with aluminum oxide or sand, pallets to avoid direct contact with the ground. If stored for a
and not with steel or metal grit. Excessive blasting may long period of time, rotate Side-A and Side-B drums regularly.
result in a warped or deformed surface. After blasting, wash Limitations
aluminum with a commercially available aluminum cleaner. Do not open until ready to use. Both Side-A and Side-B
Allow to dry, then prime.
containers must be fitted with a desiccant device during use.
BRASS AND COPPER Warning
Brass and copper should be blasted with sand, and not
with steel or metal grit. Remove all dust and grease prior to This product contains Isocyanates and Curative Material.
applying primer.

GALVANIZED SURFACES

POLYCOAT PRODUCTS TEL 562.802.8834 | FAX 562.921.7363 Section 9.4
wpsales@polycoatusa.com | www.polycoatusa.com