Instructions / Assembly

Henry Company 999 N. Sepulveda Blvd., Ste. 800, El Segundo, CA 90245
Technical Services - Phone: [phone]
E-mail: [e-mail] www.Henry.com
Rev. Date: 03/03/2015
887HS TROPI-COOL® 100% SILICONE WHITE ROOF COATING – HIGH SOLIDS
Product Size
1 GALLON, 5 GALLON
Shelf Life
Unopened, 24 months from date of manufacture when stored in a cool, dry, and shaded location.
Usage
Coating can be used on many different commercial or residential roof substrates to reflect the sun's heat and UV rays, as well as to help seal
and protect the surface. It works well on low slope roofs and is suitable for pitched roofs. Acceptable roof types include:
• Aged asphalt roofs – including Built-Up Roofing (BUR) and Modified Bitumen (MB)
• Aged single-ply roofs – TPO, EPDM, PVC, and Hypalon® roofs
• Spray polyurethane foam (SPF) roofs
• Metal roofs
• Concrete roofs
• Recoating previously coated roofs
• RV, trailer, and mobile home roofs
On metal roofs, remove all rust and treat with a rust-inhibiting spot primer. NOT recommended over shingles of any kind.
Apply a test area of coating over the existing membrane to verify absence of bleed-through and proper adhesion to membrane prior to start of
application.
Please consult Product Support for specific questions regarding application of this product.
Coverage
Approximately 100 square feet per 1.5 gallons (approximately 319 square feet per 5 gallon pail). Dry film thickness (DFT) should be a
minimum of 22 mils.
Application
1. CLEAN: Using a pressure washer or high pressure nozzle on hose, use appropriate pressure to wash the roof with a non-filming detergent,
such as TSP or TSP substitute. In areas with stubborn dirt, grease, or other contaminants, use a stiff bristle brush or broom to scrub the areas
clean with additional water and non-filming detergent. Treat mildew or mold. Give the roof a final rinse to ensure it is free of all detergent or
anything else that could affect adhesion. Allow roof to dry completely before application. Apply a test area of coating over the existing
membrane to verify absence of bleed-through and proper adhesion to membrane prior to start of application.
2. REPAIR: Repair defects, such as splits, cracks, blisters, deteriorated flashing, cracked metal edging, and any other defects affecting the
watertightness of the roof. As a preventative measure, seal all roof penetrations, curbs, flashings, transition areas, areas where dissimilar
materials intersect, and other areas that could leak with Henry 884 Tropi-Cool® 100% Silicone Roof Sealant or Henry 885 Tropi-Cool® 100%
Silicone Seam & Repair Roof Sealant. Ensure all roof drains are clean and clear and cut back any vegetation that is growing above the roof
which may cause debris to fall on the roof and clog drains in the future.
3. APPLY: Coating should only be applied to a clean, dry, and fully prepared roof substrate as described above. Application at temperatures
lower than 50°F (10°C) and less than 35% relative humidity will typically result in slower cure times. It may be applied with a ½” to 1” nap lint-
free roller, brush, or commercial airless spray rig. If spraying, a commercial airless spray rig capable of producing a minimum of 3500 psi at the
spray gun tip is required. The pump should have a minimum of 3 gallons per minute output and be fed by a 5:1 transfer pump to prevent
cavitation. Always use components rated for pump pressure. Hoses should be Buna-N jacketed for prevention of moisture contamination.
Hoses should have a minimum I.D. of ¾” and an adequate working pressure. The spray gun should be high pressure (5000 psi) with a reverse-
a-clean spray tip, having a minimum orifice of 0.030 and a 50° fan tip. Do not use hose that has been used for acrylics because the liner
absorbs moisture and initiates the silicone cure process. Mix well prior to and during use with a drill and mixing paddle. For 1 and 5 gallon
pails, use a minimum 3” diameter mixing paddle or hand mix with a suitable paddle until consistent viscosity is achieved. In drums, use a
minimum 6” diameter mixing paddle. Containers are packaged to keep latent moisture from prematurely starting the curing process. After
opening the container, try to use it up as soon as possible. Keep containers covered and sealed at all times during use, when practical.
Coating is a moisture cure product that will draw water molecules out of the atmosphere to cure. Because of this, material left exposed to the