Technical Specifications

Rubberized
SBS Premium Roof Cement
Use for Sealing & Leak Repair on Vertical & Horizontal Surfaces on Shingles,
SBS Roof Systems, Built-Up Roofs, & Modified Bitumen Single Plys
Revised: 03/20
Manufacturer:
ThorWorks Industries, Inc.
2520 S. Campbell St.
Sandusky, OH 44870
Phone: [phone]
Fax: [phone]
Description & Uses
A high performance, professional grade flashing
and repair product that cures to a long lasting
rubber-like film. This product remains flexible
through extreme temperature ranges. Its
exceptional adhesion makes this an ideal cement
for vertical or horizontal construction and repair
of all flashings, metal joints, seams, coping, vent
pipes, skylights, chimneys, breaks in roofing,
bonded roof shingles, foundations, parapet walls,
gutters, concrete, & SBS roof systems. This product
is ideally suited for sealing cracks, holes, and tears
in built-up roofs and modified bitumen single plys.
Dries Black.
Surface Preparation
All surfaces to be treated must be free from
oil, grease and other foreign materials prior to
application. The surface must be firm and free from
loose material. On composition roofs, open any
breaks or blisters to be patched and permit to dry
out before applying this product. Allow at least
24 hours to dry (32 ºF or higher and less than 50%
humidity with no rain) before applying a surface
coating.
10 & 29 oz. Tube - Trim Nozzle to desired bead
size. Puncture foil at innerbase of nozzle. Using a
caulking gun, apply to a minimum wet thickness of
1/4”. Allow at least 24 hours to dry (32 ºF or higher
and less than 50% humidity with no rain) before
applying a surface coating. Use above or below
grade.
Roof Cement - Using a trowel, spread Roof Cement
onto the surface at a thickness of about 1/8”,
making sure to smooth down the edges. Mend
cracks, splits or blisters by troweling the cement to
the affected area and three inches beyond. Embed
SealBest Reinforcing Fabric into the repaired
area and topcoat with another layer of roof patch
material.
Rolled Roofing - Apply Roof Cement with a
roofer’s brush or a masonry trowel in a uniform
consistency. Apply a sufficient amount of adhesive
to cover the entire underside of the membrane
and to allow a 1/8” - 1/4” bead of adhesive to form
along the lap seam when membrane is pressed
into place. Broom or walk the overlying sheet
firmly into the cement and smooth it out to prevent
buckles or blisters.
Drying Time
Roof Cement - Dry to touch in 8 hours, depending
upon weather conditions. Remains soft and pliable.
Rolled Roofing - Allow 24 hours depending on
weather conditions.
Clean Up
Clean up with waterless hand cleaner immediately
after use. Clean tools with mineral spirits or
kerosene in a well ventilated area immediately
after use.
Weather Conditions
Do not apply if rain is imminent or forecast within
24 hours of application.
Coverage (Approximate)
10 oz. tube - 30 lineal feet of 1/4” x 1/4” bead per.
29 oz. tube - 87 lineal feet of 1/4” x 1/4” bead per.
Roof Cement - 12 sq. ft. at 1/8 inch thick per gallon.
Rolled Roofing - 50 square feet per gallon, 150-175
Linear foot/4 inch Lap
Precautions
HARMFUL OR FATAL IF SWALLOWED. If ingested,
do not induce vomiting. Seek medical attention
immediately.
EMPTY CONTAINER WARNING: CONTAINER MAY
BE HAZARDOUS WHEN EMPTY as container may
contain product residues and/or combustible
vapors. All labeled hazardous precautions must
be observed. Dispose of empty container in
accordance with local, state or federal regulations.
CAUTION! COMBUSTIBLE
CONTAINS PETROLEUM DISTILLATE. Keep away
from heat and flame. To avoid breathing vapors or
spray mist, ensure fresh air during application and
drying. If you experience eye watering, headaches
or dizziness, increase fresh air or wear respiratory
protection (NIOSH/MSHA TC 23C or equivalent)
or leave the area. Close container after each use.
www.sealbest.com