Dow Perimeter Sealing/SPF Roof Repair - Manual (Page 2)

4. Cut the damaged or blistered area at
an inward, tapered, 45° angle (Figure
2). Cut back any defective and moist
foam until solid, dry foam is exposed.
Where possible, remove at least 6"
beyond the area to be repaired.
7. To “form” the final pass, place the
plywood wrapped in polyethylene
over the area to be filled. Carefully
spray the foam under the plywood,
holding the plywood down (Figure 4).
Wait about a minute for the foam to
rise to the underside of the plywood
and begin curing. After removing the
plywood, check that the foam is
equal to the height of the surrounding
parapet.
I N S T A L L A T I O N I N F O R M A T I O N . C O M M E R C I A L . U N I T E D S T A T E S
5. Place a piece of plywood wrapped
in polyethylene next to the area to
be filled.
6. Depending on the depth of the repair
area, use two or more coats/passes
of FROTH-PAK
™ 200 Foam Sealant
to obtain a thickness that is approxi-
mately 2" from the top of the area.
Apply the foam in layers of 2" or less
in any single pass (Figure 3). 8. Once the foam has cured (approxi-
mately 5 minutes), remove any
overspray with a roofing knife (Figure
5). If additional shaping is required,
cut the cured foam with a handsaw.
APPLY FINISH COATING (IF REQUIRED)
Note: Always protect FROTH-PAK ™
Foam Sealant within 3 hours after
application with a protective coating.
Brush or roll a 30-40 mil quality
protective coating (similar to the
originally applied coating).
DISPOSAL
1. Dispose of any foam waste and
empty FROTH-PAK ™ Foam Sealant
cylinders as a non-hazardous waste
(outlined in the operating instructions)
and in accordance with local and
state regulations.
2. Depressurize cylinders prior to
disposal.
Figure 2
NOTICE: No freedom from any patent owned by Dow or others is to be inferred. Because use conditions and applicable laws may differ from one location to another and may change with time, Customer is responsible
for determining whether products and the information in this document are appropriate for Customer’s use and for ensuring that Customer’s workplace and disposal practices are in compliance with applicable laws and other
government enactments. Dow assumes no obligation or liability for the information in this document. NO EXPRESS WARRANTIES ARE GIVEN EXCEPT FOR ANY APPLICABLE WRITTEN WARRANTIES SPECIFICALLY
PROVIDED BY DOW. ALL IMPLIED WARRANTIES INCLUDING THOSE OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY EXCLUDED.
COMBUSTIBLE: FROTH-PAK™ Foam Sealant is combustible and may constitute a fire hazard. Do not expose foam to flame or temperatures above 240°F. For more information, consult MSDS, call Dow at 1-866-583-BLUE (2583)
or contact your local building inspector. In an emergency, call 1-989-636-4400.
FROTH-PAK™ Polyurethane Spray Foam contains isocyanate, hydrofluorocarbon blowing agent and polyol. Read the instructions and Material Safety Data Sheets carefully before use. Wear protective clothing, gloves,
goggles or safety glasses, and proper respiratory protection. Supplied air or an approved air-purifying respirator equipped with an organic vapor sorbent and a particle filter may be required to maintain exposure levels below
ACGIH, OSHA, WEEL or other applicable limits. Provide adequate ventilation. Contents are under pressure.
GREAT STUFF PRO™ Gaps & Cracks Insulating Foam Sealant contains isocyanate and a flammable blowing agent. Read the label and Material Safety Data Sheet carefully before use. Eliminate all sources of ignition before
use. Wear gloves, and goggles or safety glasses. Provide adequate ventilation or wear proper respiratory protection. Contents under pressure.
Building and/or construction practices unrelated to building materials could greatly affect moisture and the potential for mold formation. No material supplier including Dow can give assurance that mold will not develop in
any specific system.
Printed in U.S.A. ®™Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow Form No. 179-05326X-0510P&M
www.dowbuildingsolutions.com Technical Information
1-866-583-BLUE (2583)
Sales Information
1-800-232-2436 IN THE U.S.
THE DOW CHEMICAL COMPANY
200 Larkin
Midland, MI 48674
Figure 3
Figure 4
Figure 5
McKAY204695