869 Rubberized Aluminum Roof Coating

Henry 869 Rubberized Aluminum Roof Coating is an aluminum-pigmented roof coating modified with SBS rubber polymers. It is a black liquid with silver pigment that dries to an aluminum color. The data sheet is dated 09/13/2022. It is used on commercial, institutional and industrial roofs. As a metal roof coating and asphalt roof coating, it is applied to recoat roofs previously coated with asphalt emulsion or aluminum coatings, to asphalt roofs including built-up roofing (BUR) and modified bitumen (MB), and to metal roofs.

The coating is aluminum in color only, in a 5 gallon size. The SBS rubber polymers are the basis of its elastic properties, and it is listed with CRRC rating and Miami-Dade approval.

• Appearance: black liquid with silver pigment.
• Solids by weight: 50% minimum (ASTM D2824).
• Solids by volume: 42% minimum (ASTM D2697).
• VOC: 450 g/l maximum (EPA Method 24).
• Weight per gallon: 8.6 to 9.4 lbs (ASTM D2828).
• Brookfield viscosity: 4,500 to 7,500 cPs (ASTM D2828).
• Aluminum content: more than 9%.
• Water content: 0.3 maximum.
• Flash point: 100 F (38 C) minimum (ASTM D3278).
• Initial tensile strength of film: 90 psi minimum (ASTM D2370).
• Initial elongation: 170% minimum (ASTM D412).
• Water migration resistance: pass (ASTM D7281).

The values below are per the Cool Roof Rating Council (CRRC).

• Solar reflectance: 0.69 initial and 0.50 after 3 years (ASTM C1549).
• Thermal emittance: 0.40 initial and 0.48 after 3 years (ASTM C1371).
• Solar Reflectance Index (SRI): 70 initial and 42 after 3 years (ASTM E1980).

The coating is listed with solar reflectance above 65% under ASTM D2824, Type III. The data sheet also describes it as stopping rust on metal roofs and sealing hairline cracks and pinholes.

• CRRC rated under Product ID# 0620-0043 (Cool Roof Rating Council).
• Miami-Dade County Approved.
• Meets or exceeds ASTM D2824, the specification for aluminum-pigmented asphalt roof coatings, Type III.
• Meets or exceeds ASTM D7281, the test method for water migration resistance through roof membranes.

The roof is washed with a non-filming detergent such as TSP or a TSP substitute, using a pressure washer or high pressure nozzle. Stubborn dirt, grease or contaminants are scrubbed with a stiff bristle brush or broom. Algae and moss are treated with a 50:50 mix of laundry strength liquid chlorine bleach and water, sprayed on and left to dwell for 15 to 20 minutes before a low pressure rinse. The roof must be completely dry before coating, and remaining dust and debris are cleared with a leaf blower or broom. Cracks, breaks, splits and holes are repaired by embedding Henry 181 or 183 Roof Repair Fabric between two heavy coats of Henry 209XR, 208R or 208 Wet Patch Roof Leak Repair, Henry 505 FlashMaster Flashing Cement or Henry 204 Plastic Roof Cement. The repair extends at least 2 inches beyond, and the mastic cures for 30 days before coating. On metal roofs, rust is removed by wire brushing.

The coating is mixed mechanically and thoroughly before and during application, and applied to a dry surface. Application to a damp surface makes the product appear brown. It is applied with a soft bristled brush, heavy napped roller or commercial grade spray equipment.

• Application temperature: 40 F to 100 F (4 C to 38 C), with ambient temperature listed as 40 F (4 C) and rising.
• Application is liberal and in one direction only, without lapping. Overworking, multiple directions, inconsistent coverage or poor mixing interferes with the leafing action of the aluminum and can produce varying shades of color as the coating dries.
• The product is not thinned and is not applied if rain or temperatures below 40 F (4 C) are expected within 12 hours. Low temperature or high humidity may need longer drying time.
• Air intakes on the roof are closed until solvents dissipate.
• The container is not heated or stored above 110 F (43 C).

Discoloration in ponding water areas is normal and cosmetic and does not affect the coating's ability to protect the surface.

Coverage is approximately 240 to 320 square feet per 5 gallon pail, or about 100 square feet per 1.5 to 2.0 gallons. Coverage varies with surface texture, and the rate is reduced as roof slope increases to prevent run off or slippage. The product size is 5 gallon. Tools are cleaned with mineral spirits and hands with a waterless hand cleaner.

The coating is not for application over rubber or PVC sheet roofs, SPF roofs, silicone coated roofs, shingles of any kind, or roofs previously covered with loose or embedded gravel ballast. The data sheet carries a Henry limited product warranty. Henry will replace at no charge any product proved to have a material defect within 12 years of purchase, provided it was applied in accordance with Henry's written directions and proof of purchase is provided. The purchaser may return unopened containers within 30 days of purchase for a full refund.