Use and Care Manual

TECHNICAL DATA ROC-70
980 SILICONE
ROOF COATING
Form: GDH-1163
Rev.: 050417
1
.DESCRIPTION AND USES .
Rust-Oleum
®
980 Silicone Roof Coating is a high
solids,100% silicone based roof coating that creates a
durable, breathable, watertight and weatherproof barrier
that resists natural weathering and reflects heat from the
sun. 980 Silicone Roof Coating resists ultraviolet radiation
and adapts to temperature extremes to provide long-term
weathering protection and energy savings. The premium
high solids formula allows for one coat application without
the use of a primer. 980 Silicone Roof Coating can be
applied over spray applied polyurethane foam, aged
single-ply roofs including PVC, EPDM, TPO, Hypalon
®
,
aged acrylic coatings, concrete, asphalt built-up roofs,
granulated modified bitumen, metal, RV and trailer roofs,
and over existing silicone roof coats. 980 Silicone Roof
Coating contains no solvents.
PERFORMANCE CHARACTERISTICS .
 100% silicone, 98% solids – allows for one coat
application
 84% reflectivity
 Resists ponding water
 Resists rain after 2 hours
.PRODUCTS .
SKU Description
308663 Silicone Roof Coating – 4.75 Gals.
308666 Silicone Roof Coating – 0.9 Gals.
PRODUCT APPLICATION .
SURFACE PREPARATION
All surfaces must be clean and free from dirt, grease, oil,
mold, algae, loose granules, loose paint, rust, excess
chalk and other foreign matter which could prevent proper
adhesion. Use a high pressure wash and stiff bristle brush
or broom scrub the surface. An appropriate non-filming
cleaner should be used to remove all grease or oily
deposits.
EPDM roofs may require aggressive power washing and
may need to be cleaned twice to remove all surface
contamination. Rinse thoroughly and allow to dry. Seams,
fasteners, roof penetrations and any roof defects should
be repaired and sealed prior to applying the topcoat.
Test a small area for adhesion and bleed through before
full surface application. To maximize adhesion on problem
substrates, including un-weathered single-ply or to prevent
bleed through from asphalt & bitumen surfaces, prime with
Rust-Oleum 115 Epoxy Primer. Spot prime with a Rust-
Oleum Rust Preventing Primer.
PRODUCT APPLICATION (cont.) .
APPLICATION
Do not thin or alter product. Apply only when air, material,
and surface temperatures are between 32-120ºF (0-49ºC).
For cold weather application (below 55ºF), store unopened
container indoors for 24 hours prior to application. Do not
apply if rain is expected in less than 2 hours. Mechanically
mix prior to application and during use. Avoid entraining
air when mixing. Apply with a brush, ¾” nap roller or spray
equipment. For one coat application, apply at a minimum
rate of 1.5 gallons per 100 square feet (25 mils wet).
Coating must be applied uniformly and without pinholes.
The dry film thickness (DFT) will be approximately 24 mils.
A second coat may be required on rough or uneven
surfaces. For a two coat application, apply a base coat at
a minimum rate of 1 gallon per 100 square feet (16 mils
wet). Apply a second coat at the same rate. Allow 2-4
hours before applying a second coat. Apply perpendicular
to the first coat. The dry film thickness (DFT) will be 15
mils per coat.
SPRAY EQUIPMENT RECOMMENDATION
Minimum spray equipment requirements are a 7,000 psi
unit delivering at a capacity of 1-2 gallons per minute with
a 0.027-0.40 tip (0.027-0.031 preferred). Use 1” lines on
the sprayer and ¾” whip to the gun.
CURING
This product cures through absorption of moisture from
both the substrate and the air. Cure time will be faster in
humid conditions and on substrates that hold moisture
such as concrete. Keep containers closed as much as
possible during use. Open and partially full containers will
skin over quickly. If this occurs, remove the skins and
continue using the remaining product. Avoid walking on
980 Silicone Roof Coating except for occasional
maintenance. Use caution when walking on a wet roof.
COVERAGE
One gallon will cover 65 square feet at 25 wet mils in a
single coat application. Apply at 100 square feet per gallon
at 16 wet mils when used in a two coat application.
DRY & RECOAT TIMES
Dry and recoat times are based on 70ºF and 50% relative
humidity. Dries in 2 to 4 hours. Return to service after 24
hours. Environmental or site specific conditions may
require variations in cure times.
CLEAN-UP
Clean wet material with soap and water. Dried material
can be cleaned with mineral spirits. Follow equipment
manufacturer’s directions to clean spray equipment.
Properly dispose of all soiled rags and containers.