< Fields Coatings & Mastics 100 to 300 Series

Product Information Sheet
F300 PowrMastic
All Weather Asphalt Mastic

USES: F300 PowrMastic stops leaks in the rain. It even adheres under water. You can effectively seal around chimneys, vents, pipes, air conditioning equipment, skylights, drains, flashings, and sheet metal. PowrMastic also repairs surface fissures, seals down shingle tabs, stops leaking nail heads, cements laps on roll roofing, and bonds roofing sheets to the deck. PowrMastic is compatible with SEBS, APP, and SBS modified bitumen roofing products and will adhere to most surfaces including roofing, wood, metal, glass, and concrete.

DIRECTIONS: F300 PowrMastic is friendly to apply, even in below freezing, wet conditions. Apply with a broad putty knife. Warm PowrMastic to room temperature for easiest application. Clean gravel, dirt, vegetation, and debris from the application area. Make sure the application surface is smooth, firm, and frost-free. Apply directly from the container without diluting. When applying to a wet surface, trowel and work the PowrMastic onto the surface until a secure bond is achieved. Seal areas exposed to water penetration with PowrMastic. Generously apply a minimum .5" thick layer of PowrMastic over the exposed area. Make 3 layer repair with PowrMastic and PolyWeb over fissures or to reinforce degraded areas. First trowel a generous application of PowrMastic over the application area and beyond the width and length of the PolyWeb you intend to install. Second, lightly trowel the PolyWeb into the PowrMastic. Third, carefully trowel a generous application of PowrMastic over the entire repair, making sure to completely cover the PolyWeb. For severe fissures, apply additional layers of PolyWeb and PowrMastic.

DESCRIPTION: F300 PowrMastic is a quality all weather asphalt mastic manufactured from 100% oxidized roofing asphalt. Select raw materials have been formulated to make PowrMastic a premium product. PowrMastic provides superior elastic performance against thermal shock, the daily expansion and contraction of a roof caused by temperature changes. In addition, the sun's UV rays attack the roof membrane making it brittle and weak, inducing membrane ruptures during thermal shock cycles. PowrMastic is your best defense against these attacks. With PowrMastic your roofing and waterproofing installations will perform much longer. PowrMastic is asbestos free.

SPECIFICATIONS: F300 PowrMastic exceeds the standards of the American Society for Testing and Materials ASTM D 4586 Type 1. Maximum VOC is 275 grams per liter.

PACKAGING: F300 PowrMastic is available in 11 oz tubes, 1 quart cans, 1 gallon cans, 3 gallon pails, and 5 gallon pails.

Approximate Pounds Per Gallon 8.2
Minimum Percent Nonvolatile Weight 70
Approximate Hours Set Up Time to the Touch 24
Days Set Up Time Before Applying Reflective Coating 90
Optimum Application Temperature Range in deg. F 40 to 90
Application Consistency Trowelable




F300 MSDS >

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