RUST-OLEUM ROC-246 790 Synthetic Roof Coating User Manual
- June 4, 2024
- Rust-Oleum
Table of Contents
ROC-246 790 Synthetic Roof Coating
User Manual
DESCRIPTION AND USES
Rust-Oleum® 790 Synthetic Silicone Roof Coating is a non- fibered, semi-gloss,
water-based acrylic roof coating which is specially formulated with a fluoro-
polymer resin. The 790 coating is VOC compliant as a roof coating and is
asbestos free. 790 Coating is used as a semi-gloss finish coat over the water-
based acrylic roof and wall coatings and other approved coatings and
substrates as recommended by Rust-Oleum, such as granule surfaced modified
bitumen membranes. 790 coating provides long-term color-fast performance under
constant solar exposure, such as those conditions found on roofs and exterior
building walls. 790 coating also offers superior resistance to dirt pickup.
790 coating has been tested for reflective properties according to the
standards of the Cool Roof Rating Council (CRRC) and is listed in the CRRC
Rated Products Directory.
For use on metal roofs, concrete, modified bitumen, built-up, and weathered
single-ply roofing.
PRODUCT FEATURES
- Stays white 3X longer than silicone
- 88% reflectivity
- Resists rain & ponding water in 1 hour
- Cool Roof technology
- 700% elasticity, resists cracking
PRODUCTS
SKU | DESCRIPTION (Bright White) |
---|---|
381787 | 5 Gallon Pail |
381788 | 1 Gallon |
PRODUCT APPLICATION
SURFACE PREPARATION
All surfaces must be clean and free from dirt, grease, oil, loose granule,
loose paint, rust, excess chalk, and other foreign matter, which could prevent
proper adhesion. This is best accomplished using a high-pressure wash of at
least 2,000 psi. A surface cleaner shall be used to remove all grease or oily
deposits. Remove all dirt, dust, and other loose debris from the roof. The
area to be coated must be a clean, sound, and dry surface.
WARNING! If you scrape, sand, or remove old paint from any surface, you
may release lead paint dust. LEAD IS TOXIC. EXPOSURE TO LEAD DUST CAN CAUSE
SERIOUS ILLNESS, SUCH AS BRAIN DAMAGE; ESPECIALLY IN CHILDREN. PREGNANT WOMEN
SHOULD ALSO AVOID EXPOSURE. Wear a NIOSH-approved respirator to control lead
exposure. Clean up carefully with a HEPA vacuum and a wet mop. Before you
start, find out how to protect yourself and your family by contacting the
National Lead Information Hotline at 1-800-424-LEAD or log on to
www.epa.gov/lead.
APPLICATION
An adhesion test may be required. Consult with your Rust-Oleum representative.
Mechanical mixing is recommended. Ensure the product is consistent in
appearance and viscosity. Avoid entraining air when mixing. Install product
using one of the approved application methods evenly at the recommended
coverage rate. Use wet mil gauges to monitor coverage rates throughout the
application.
Two coats are recommended. Applying the second coat after the first coat will
support foot traffic without tracking. Avoid foot traffic on the final coat
for 24 hours. For best results, apply the second coat in a direction that is
perpendicular to the first coat. For spray application, take necessary
precautions to avoid overspray. 790 can be sprayed, rolled, or brush applied.
If rolling, use medium nap polyester. If brushing, use bristle,
nylon/polyester, or nylon. See below for spray equipment recommendations.
SPRAY EQUIPMENT RECOMMENDATION
Airless Spray: Pneumatic, hydraulic, or electric pump with a minimum 2,000 psi
material output pressure. Reversible spray tip with a 0.017’’ to 0.025’’
orifice and a 40° to 60° spray fan. Material spray lines must be properly
rated for the maximum working pressure of the pump being used.
Fan
Width”| 0.39| 0.| 0.| 0.| 0.| 0.
---|---|---|---|---|---|---
10-12″| 539| 543| 547| 555| 547| 559
12-14″| 639| 643| 647| 651| 647| 659
14-16″| 739| 743| 747| 751| 747|
16-18″| 839| 843| 847| 851| 847|
Flow| 1.60| 2.| 2.| 3.| 2.| 4.
Rate| gpm| gpm| gpm| gpm| gpm| pm
DRY & RECOAT TIMES
Dry and recoat times are based on 77°F (25°C) and 50% relative humidity. Dry
times increase at cooler temperatures.
Dries to the touch in 6 hours; allow minimum 24 hours recoat. Environmental or
site-specific conditions may require variations in cure times.
COVERAGE
Apply two coats at 0.75 gal./100 square feet (1.6 m 2/L) (12 wet mils) per
coat for a total application rate of 1.5 gal./100 square feet (3.2 m 2/L).
CLEAN-UP
Soap and water. Wipe up splatters before they dry. Follow the equipment
manufacturer’s directions to clean spray equipment.
LIMITATIONS
Surfaces must be clean and free of dirt, dust, and other contaminants. Not
intended for use in ponded areas. Do not apply unless temperatures are at
least 45°F (7°C) and rising. Do not apply if temperatures are expected to
drop below 45°F (7°C) within 48 hours of application. Do not apply to wet
surfaces. Do not apply unless the ambient and surface temperatures are at
least 5°F (-15°C) above the dew point. Do not apply when freezing temperatures
are expected within 48 hours after application. Do not apply if rain is
expected within 12 hours. If temperatures drop below 60°F (15°C), do not apply
if rain is expected within 24 hours.
Store container at temperatures above 32°F (0°C). Do not allow the container
to freeze. Store container indoors in a heated area. Do not apply over hot
applied asphalt or coal tar pitch flood or glaze coats.
PERFORMANCE CHARACTERISTICS
ELONGATION
METHOD: ASTM D2370
TYPICAL RESULT: 395%
TENSILE STRENGTH
METHOD: ASTM D370
TYPICAL RESULT: 393 psi
ADHESION
METHOD: ASTM D1876
TYPICAL RESULT:
Granulated Cap Sheet (No primer) 5.20 lbf/in
Granulated Cap Sheet (SP Primer) 6.08 lbf/in
Smooth MB (No Primer) 2.73 lbf/in
Smooth MB (SP Primer) 5.59 lbf/in
DENSITY @77°F (25°C)
METHOD: ASTM D1475
TYPICAL RESULT: 9.4 lbs/gal (1.12 kg/L)
GLOSS @ 60°
METHOD: ASTM D523
TYPICAL RESULT: 60.5
VISCOSITY @ 77°F (25°C)
METHOD: ASTM D2196
TYPICAL RESULT: 15,000 cP (15 Pass)
SRI-SOLAR REFLECTIVE INDEX
METHOD: ASTM E1980
TYPICAL RESULT: 111 – Initial 102 – 3 Year Aged
PHYSICAL PROPERTIES
| 790 SYNTHETIC ROOF COATING
---|---
Resin Type| Acrylic. PVC. Fluoropolymer
Pigment Type| Titanium Dioxide
Solvents| Water
Weight| 9.4 lbs./gal
Solids| By Weight| 48.%
By Volume| 42.%
Volatile Organic Compounds| <50 g/I
Recommended Dry Film Thickness (DFT) Per Coat| Varies, substrate-dependent
Wet Film to Achieve DFT (Unthinned Material)| Varies, substrate-dependent
Practical Coverage at Recommended DFT (assumes 15% material loss)| Apply two
coats at 0.75 gal./100 square feet (1.6 m2/L) (12 wet mils) per coat for a
the total application rate of 1.5 gal./100 square feet (3.2 m2/L).
Dry Times at 77°F (25°C) and 50% Relative Humidity| Touch| 6 hours
Recoat| After 24 hours
Shelf Life| 12 months in unopened containers when stored properly
WARNING| PROTECT FROM FREEZING
Safety Information| For additional information. see SDS
The technical data and suggestions for use contained herein are correct to the best of our knowledge and offered in good faith. The statements of this literature do not constitute a warranty, express, or implied, as to the performance of these products. As conditions and use of our materials are beyond our control, we can guarantee these products only conform to our standards of quality, and our liability, if any, will be limited to the replacement of defective materials. All technical information is subject to change without notice.
Rust-Oleum Corporation
11 Hawthorn Parkway
Vernon Hills, Illinois 60061
Phone: 866∙585∙8430
www.rustoleum.com
Form: ARJ-2370
Rev.: 033022
References
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