Page 58 - Catalogs

Prime all joints, cracks, flashings with approved primers as kg/sqm) or as required to achieve a slip-resistant finish. This
specified below in Phase 2. Apply a two-part paste consisting coat will result in an additional 14 ± 2 dry mils thick membrane,
of PC-220SC and PC-50 over all joints, cracks, and flashing. exclusive of aggregate.
Mixing ratio is a ½ pint of PC-50 to 1 gallon of PC-220SC (0.24
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liters per 3.78 liters) or 1 quart PC-50 to 5 gallons of PC-220SC Backroll the aggregate into the wet Poly-I-Gard 246SC topcoat
(0.9 liter to 18.9 liters). A manufacturer approved single or and allow to cure overnight before exposing the completed
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two-component polyurethane sealant may also be used to Polydeck MR (Mechanical Room) system to pedestrian traffic.
bridge joints, cracks and flashings. Do not mix more material Poly-I-Gard 295 may be substituted for Poly-I-Gard 246SC.
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than can be used in 20 minutes. Bridge the joints, cracks, and Apply topcoat of Poly-I-Gard 295 at 1 gallon/100 sqft or 100
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flashings with 4” (10.2 cm) Straight Jacket Tape, pushing it sqft/gallon resulting in a 14 ± 2 dry mil (357 ± 50 dry microns)
into the paste with a trowel. Over Straight Jacket Tape, apply thickness. Immediately broadcast washed, dry, rounded sand
a stripe coat of the PC-220SC and PC-50 mixture and taper it 20 mesh into the wet coating at a rate of 10lbs/100 sqft (0.5
onto the adjacent surface. All cracks in concrete substrates kg/sqm) as required to achieve a slip-resistant finish and back
must be treated per Polycoat Architectural Details. Allow the roll the aggregate into the wet coating.
surface to cure for 6 to 8 hours.
FINISHED SYSTEM:
PHASE 2: When applied as directed, the Polydeck MR (Mechanical
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Substrates other than new plywood are to be primed. Primer Room) system will provide 48 ± 5 dry mils (1228 ± 125 dry
is optional for new plywood. Metal and concrete which have microns),and 56 ± 5 dry mils (1422 ± 125 dry microns) with
been cleaned should be primed with Polyprime 2180SC at broadcast sand, of superior waterproofing protection. Requires
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a rate of 1 gallon (mixture of Part-A & Part-B)/300 sqft (0.14 a continuous coating application to minimize lines and/or
liters/sqm) or 300 sqft/gallon. Apply using a brush or phenolic streaking. Any optional adhesion test is to be performed seven
core roller. This will result in a 3 dry mils (76 microns) thick days after product application.
membrane.
Limitations
Note: For rough or porous concrete or when outgassing is a concern,
use Polyprime EBF-LV at an approximate rate of 1 gallon/200 sqft (0.21 The following conditions must not be coated with Polycoat
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liters/sqm) or 200 sqft/gallon; this rate may vary on the porosity of Products deck coating systems or products: on grade slabs,
the substrate. Allow primer to become tack free before moving unto split slabs with buried membrane, sandwich slabs with
the Coating Application. The point at which the primer is deemed tack insulation, slabs over unvented metal pan, magnesite, or
free is when the primer passes thumbprint test. The thumbprint test is concrete with a structural integrity less than 3000 psi. Asphalt
defined by when a thumbprint is left in the primer and primer does not surfaces and asphalt overlays may be coated with Polycoat
transfer to the thumb. If the primer has been allowed to remain tack
free for more than 12 hours, it is necessary to solvent wipe surface decking systems if first coated with the Polycoat™ PC-IM 129.
with VOC-compliant solvent and re-prime the surface.
Concrete must exhibit 3000 psi minimum strength. Concrete
PHASE 3: surfaces to be coated must be trowel finished in compliance with
Apply PC-220SC to substrate at a rate of 2 gallons/100 sqft or the American Concrete Institute (except that hand troweling
50 sqft/gallon. This coat will result in a 28 ± 2 dry mils (711 ± is not required), followed by a fine-haired brooming, left free
51 microns) thick membrane. For best results, use a 1/8” (0.32 of loose particles, and shall be without ridges, projections,
cm) notched trowel or notched squeegee. A 3/8” (0.965 cm) voids and concrete droppings that would be mechanically
nap phenolic core roller may be used but extra care should be detrimental to coating application or function.
taken to prevent air bubbles. Allow PC-220SC to cure before
proceeding to Phase 4. New concrete must be cured for 28 days. Concrete cleaning
(see General Guidelines). Polycoat Products coating systems
Poly-I-Gard 295 may be substituted for PC-220SC. Apply Poly- should not be subjected to rising water tables or hydrostatic
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I-Gard 295 at 2 gallons/100 soft or 50 sqft/gallon, resulting in pressure on slab-on-grade decks. The only acceptable grade of
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a 30 ± 2 dry mils (762 ± 51 microns).
plywood is APA rated exterior grade or better. The appearance
Note: Polycoat basecoats should be applied the same day as the and physical characteristics of the plywood and grade should
primer to avoid missing the primer recoat window. If this is not be considered. Plywood should be new or cleaned and sanded
possible, broadcast heavy with aggregate into the primer to aid in (see General Guidelines). The coating should be applied at
the adhesion of the basecoat to the primer. Do not exceed recoat least 5°F (3°C) above the dew point.
window of 12 hours after cure and if recoat window is passed, then
solvent wipe the surface with VOC-compliant solvent and re-prime Coverage rates recommended are based on lab conditions,
before proceeding with the next coat/phase.
applied at 75°F (24°C) ambient temperature and are intended
PHASE 4: to be minimum coverage rates on clean, smooth plywood, and
Apply a topcoat of Poly-I-Gard 246SC over the entire surface are exclusive of additional amounts needed to fill potholes,
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at a rate of 1 gallon/100 sqft or 100 sqft/gal. Immediately spalling, scaling, rough and irregular surfaces. Porosity and
broadcast washed, dry, rounded sand, 20 mesh (1.19 mm), roughness of the substrate, aggregate size, and product
6.5+ Mohs minimum hardness at a rate of 10 lbs/100 sqft (0.5 temperature will affect coverage rates. Material mil thickness

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