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GUIDE SPECIFICATIONS | Section 2.8
POLYDECK 355
®

a urethane grade environmentally safe solvent, as permitted
FINISHED SYSTEM under local regulations, immediately after use. Uncured
When applied as directed above, the Polydeck 355 Pedestrian materials are sensitive to heat and moisture. The substrate
®
Traffic Deck System will provide minimum 50 to 65 ± 5 dry must be structurally sound and sloped for proper drainage.
mils (1270 to 1651 ± 125 dry microns), exclusive of aggregate, Polycoat Products assumes no liability for substrate defects.
of superior waterproofing protection, and the assurance of Field visits by Polycoat Products personnel are for the purpose
a Class B Fire Rating over 5/8” (1.59 cm) or 19/32” (1.51 cm) of making technical recommendations only and are not to
plywood or a Class A Fire Rating on concrete. Requires a supervise or provide quality control on the job site.
continuous coating application to minimize lines and/or
streaking. Any optional adhesion test is to be performed seven Warning
days after product application. The products in this system contain Isocyanates, Solvents, Epoxy Resin,
and Curatives.
Limitations
The following conditions must not be coated with Polycoat
Products deck coating systems or products: on grade slabs,
split slabs with buried membrane, sandwich slabs with
insulation, slabs over unvented metal pan, magnesite, or
concrete with a structural integrity less than 3000 psi. Asphalt
surfaces and asphalt overlays may be coated with Polycoat
decking systems if first coated with the Polycoat™ PC-IM 129.

Concrete must exhibit 3000 psi minimum strength. Concrete
surfaces to be coated must be trowel finished in compliance with
the American Concrete Institute (except that hand troweling
is not required), followed by a fine-haired brooming, left free
of loose particles, and shall be without ridges, projections,
voids and concrete droppings that would be mechanically
detrimental to coating application or function. New concrete
must be cured for 28 days.
Polycoat Products coating systems should not be subjected
to rising water tables or hydrostatic pressure on slab-on-
grade decks. The only acceptable grade of plywood is APA
rated exterior grade or better. The appearance and physical
characteristics of the plywood and grade should be considered.
Plywood should be new or cleaned and sanded (see General
Guidelines). The coating should be applied at least 5°F (3°C)
above the dew point.
Coverage rates recommended are based on lab conditions,
applied at 75°F (24°C) ambient temperature and are intended
to be minimum coverage rates on clean, smooth plywood, and
are exclusive of additional amounts needed to fill potholes,
spalling, scaling, rough and irregular surfaces. Porosity and
roughness of the substrate, aggregate size, and product
temperature will affect coverage rates. Material mil thickness
rates are calculated on theoretical coverage for a smooth
substrate and do not account for the actual texture or substrate
conditions in the field or at the time of application. Sample
mockups on the projects are recommended to determine
the exact coverage rates necessary to waterproof the deck
to acceptable standards. Equipment should be cleaned with

POLYCOAT PRODUCTS TEL 562.802.8834 | FAX 562.921.7363 Section 2.8
wpsales@polycoatusa.com | www.polycoatusa.com