Specification

Surface Preparation: Clean the roof substrate thoroughly.
Remove all foreign matter, sealer, and old loose coatings by
sandblasting, pressure washing or wire brushing. Kill and remove
all mildew or fungus growth on the substrate, flush with water, and
let dry completely. Substrate must be dry at time of applying sealer
and subsequent coating. Be sure roof is well ventilated, in order to
avoid condensation on the roof. Repair all existing leaks.
IMPORTANT: Lanco Siliconizer™ RC-200 will resist standing
water (for up to 48 hours). Do not use on roofs with a slope less
than 1/2" inch per foot, (If used on roofs with slope less than 1/2"
inch per foot, warranty will be void if not re-coated yearly with 2
coats of Siliconizer ™ RC-200).
Mildewed Surfaces: Any existing mildew on the surface must be
completely killed and removed prior to the application of this
product. (Any mildew not removed may continue to grow through
the new finish). Scrub mildew surface with a mixture of 1 quart of
bleach with 3 quarts of warm water. Rinse completely and let dry.
Repair cracks and seams: Make sure cracks, seams, and flashing
are clean and dry. With a putty knife, apply Siliconizer™ Crack
Filler RC-230 and Fiber-Glass Patching Weave MP-997 to the
fissure/gap in or around any object affixed or penetrating the
surface to be sealed. Note: (If gap is deep, insert proper size backer
rod to 1/4" inch from surface face before filling with crack filler.
While the Siliconizer™ Crack Filler RC-230 is still wet, press In
Lanco Fiber-Glass Patching Weave MP-997(2"inches beyond on
all sides of repair). Immediately, apply a final coat of crack filler to
hide fiber-glass mesh and leave a smooth finish surface. Let dry 24
hours.
Application: Apply with a 3/4'" Nap, rough surface roller or
airless spray. Wait 24 hours between coats. Apply only when
temperature is above 50 F degrees. Do not apply if temperature
is expected to drop below 50 F degrees before coating has
completely dried. Do not apply on roof if temperature is above
95 F degrees. A hot roof can be cooled with water spray before
coating. Let roof dry before proceeding with coating. 2 coats
are needed for proper sealing. Always apply each coat in the
opposite direction. Never thin or reduce coating from full package
strength if possible.(maximum reduction is 10% with water).
Water ponding areas: Areas where ponding water lasts 1 day or
more must be repaired using roof drains or other corrective
measures, before applying Siliconizer ™ RC-200 roof sealer.
Roofs with standing water and improperly drained areas require
yearly maintenance with an additional 2 coats of Siliconizer
™ RC-200 over the affected area.
Concrete Roofs: Repair holes or any weakened areas of concrete
surface with a good quality masonry cement. Coat area to be
repaired with Lanco® Bonding Agent CB-900 and let dry. Add 1
gallon of Lanco® Bonding Agent CB-900 to each 50 pounds of
cement in the mix. Apply concrete mix and let cure for 7 days.
Repair cracks using Lanco® Siliconizer Elastomeric Crack
Filler™ RC-230 and Lanco® Fiber-Glass Patching Weave MP-
997 as recommended. Apply 1 coat of Lanco® Siliconizer
™ RC-200. Let dry 24 hours, then apply a second coat.
rev 8/10 (US) P. 36
Aged Metal Roofs: (DO NOT USE ON GALVANIZED METAL)
Clean surface, remove rust, and spot prime repaired area with
Lanco® Metal Master Primer™ MM-200 the same day. Replace
loose or missing fasteners. All fasteners must be covered with
Lanco® Siliconizer Elastomeric Crack Filler™ RC-230 and let dry
24 hours. Apply 1 coat Lanco® Siliconizer ™ RC-200. Let dry 24
hours, then apply a second coat.
Built-Up Roofs: Remove all loose gravel and clean roof
thoroughly. Repair cracks with Lanco® Siliconizer Elastomeric
Crack Filler™RC-230 and Lanco® Fiber-Glass Patching Weave
MP-997 as recommended. Apply 1 coat of Lanco® Siliconizer ™
RC-200, to completely seal all of the gravel. Let dry 24 hours.
Apply 2 coats of Lanco® Siliconizer ™ RC-200, allow 24 hours to
dry between coats.
Asphalt Roofs: Clean surface, making sure to remove all dirt, oil
and grease. Repair cracks as recommended. Apply 1 coat of
Lanco® Siliconizer ™ RC-200, let dry 24 hours, then apply a
second coat.
Asphalt Shingles: Roof must be cleaned and completely dry. Be
sure all tabs are completely sealed down. If loose tabs exist, apply
Lanco® Siliconizer Elastomeric Crack Filler™ RC-230 and
Lanco® Fiber-Glass Patching Weave MP-997 under loose tabs.
Allow 24 hours to dry. Apply 3 to 4 coats Lanco® Siliconizer ™
RC-200 at a rate of 50sq.ft. per gallon. Allow 24 hours to dry
between coats. Note: Asphalt roofing: Prior to application over
asphalt roofs the attic area should be very well ventilated (gable
vent fan works best) to prevent condensation on the roof or in
between the layers of the material or decking. Be sure all tabs
are completely adhered and sealed. Areas where the existing
material has blistered, buckled or become wet, must be removed
and repaired using similar products or system. Be sure all edges
and grooves are completely coated to ensure a uniform thickness.
If any large holes, dents, grooves or flashing transitions remain,
apply Siliconizer Crack Filler and fabric mesh on those areas not
properly sealed. Additional coats may be need in order to provide
a completely covered and uniform continuous film.
Recommend Equipment: Use airless sprayer with pressure of
1,500-2,000 psi, a fluid delivery of 1 to 2 gallons per minute, with
a spray tip of .026-.035. Use a high pressure material hose of at
least 3/8" inch inside diameter no longer than 50' feet in length.
(For longer hose lengths use larger inside diameter).
Clean-up: Clean all equipment after use with warm soapy water.
Drying Time: Approximately 1 hour to touch. Full cure is
controlled by thickness of coating applied, temperature, and
relative humidity.
Weather: Select a clear day above 50 F degrees. Consult your
weather bureau to make sure there is no precipitation forecasted.
Do not apply after 4:00 P.M. Allow a minimum of 4 hours dry
time before any precipitation comes in contact with sealer.
Notice: The technical data contained herein is true and accurate to
the best of our knowledge. Published technical data and
instructions are subject to change without prior notice.
M.S.D.S.: Available upon request.
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NORTH AMERICAN DIVISION: LANCO 600 MID FLORIDA DRIVE, ORLANDO, FLORIDA 32824 · TELS. [phone] / 1-866-447-2400 FAX: [phone]
LATIN AMERICAN DIVISION: LANCO URB. APONTE NO. 5, SAN LORENZO, P.R. (USA) 00754 TELS. [phone] / 736-5721 FAX: [phone]