Use and Care Manual

TECHNICAL DATA
OKN-02
OKON
®
S-40 WATER REPELLENT SEALER
FOR POROUS CONCRETE AND MASONRY
1
Form: GDH-571
Rev.: 120619
DESCRIPTION AND USES
OKON
®
S-40 is a water-based, oliogomeric siloxane/silane,
ready to use, deep penetrating water-repellent. It is a
colorless, odorless, non-staining, non-yellowing and nonfilm
forming penetrant used to protect concrete or masonry
surfaces without altering the appearance or texture of the
treated surface. OKON S-40 is breathable, nonflammable
and complies with VOC regulations. It is designed for vertical
surfaces, light weight concrete, normal weight concrete
block, mortar joints, porous brick, precast, pre-stressed,
poured-in-place, exposed aggregate, and air entrained
concrete and horizontal slabs, and above grade concrete
wearing surfaces. It is suitable for use on exterior walls,
sound barriers, sidewalks, ramps, parking decks, bridge
decks and industrial floors.
MPI #34 Certified. Refer to the MPI website for the most
current listing of MPI certified products.
FEATURES AND BENEFITS
 Ready-to-use waterbase, breathable
 VOC Compliant (all jurisdictions)
 Colorless, odorless, non-yellowing
 Non-glossy, will not alter texture or appearance of
treated surface
 Paintable (ASTM D3359)
 Resist high alkalinity
 Resist chloride salts
PRODUCTS
DESCRIPTION
SKU
1 Gallon
OK-641
5 Gallons
OK-640
PRODUCT APPLICATION
READ ALL INSTRUCTIONS CAREFULLY BEFORE
STARTING PROJECT
SURFACE PREPARATION
OKON S-40 can be applied to porous surfaces that are
unsealed, clean (free of dirt, waxes and oils), dry and sound.
New concrete must be cured for 21 days prior to coating.
Cracks and joints must be sealed prior to application. S-40
must be able to penetrate into the surface. Test the
openness of the substrate by sprinkling with water. If the
surface turns dark with the water S-40 can be applied. Clean
exterior surfaces by pressure washing to remove dust,
mildew, sand or other foreign matter. Vacuum and damp-
mop interior surfaces. Remove efflorescence with sulfamic
or dilute muriatic acid. If acid is used, it must be completely
neutralized before applying S-40. Rinse the surface
thoroughly after chemical cleaning. Use a degreaser to
remove oil or grease stains.
PRODUCT APPLICATION (cont.)
SURFACE PREPARATION (cont.)
Dry Substrate: A dry substrate is required to achieve proper
penetration. Allow washed surfaces to dry three days prior to
coating. Surfaces should be dry 24 hours prior to application.
In climates where freezing temperatures have existed prior
to application, allow adequate time for surfaces to thaw. Do
not apply if ambient air or surface temperatures are below
45º or over 90º F. Do not apply if rain is expected within 12
hours.
Sound Substrate: Surface of concrete and mortar joints must
be hard and firm - not loose or sandy. The surface is
unsound if it can be scraped or gouged with a flat screw
driver. Unsound mortar or deteriorated concrete should be
removed and repaired prior to coating. Prior to application,
joints or cracks must be properly sealed or filled. Parapet
walls must be capped and backside sealed with a
waterproofing membrane. Protect adjacent and underlying
surfaces from over spray and rundown.
APPLICATION
OKON S-40 is ready-to-use and should not be diluted.
Agitate before use. Avoid application in windy weather. In
hot weather, where possible, lightly spray surface with water
to cool the surface to prevent flash drying. S-40 is best
applied by low-pressure airless spray but can be applied by
garden-type sprayer or small areas can be applied by brush
or roller. For airless spray, reduce pressure to 500 psi and
use a large tip 0.035 – 0.050” tip. Hold spray tip 12-18
inches from the surface, start at the bottom of the wall and
work up with an overlapping horizontal spray pattern to
ensure run down of 6 – 8 inches. Take special care to
saturate mortar joints. Do not stop or interrupt the application
in the middle of the wall. Stop application only at expansion
joints, walls or breaks defined with masking. Uneven
application may result in blotchy appearance. Water
repellency properties will develop 24 hours to 5 days after
application.
Horizontal Surfaces: OKON S-40 can be used to provide
water repellency to horizontal concrete floors or pads. Apply
by roller, garden-sprayer or low-pressure airless. Do not
pour product onto horizontal surfaces to spread. Apply
sufficient material so that surface remains wet for several
minutes before material is absorbed. After 5-10 minutes,
back-roll remaining pools or puddles with dry-roller to
prevent excess material from drying on the surface. Material
that is not absorbed should be back rolled or brushed out to
avoid build up. A second coat may be applied to maximize
protection while the first coat is still damp. Protect shrubbery,
plants, and grass, glass, metal and asphalt surfaces during
application.