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Hydraulic cement
Can be run in either vertical (higher pick-up) or horizontal position (low CG)
Copper sulphate root killer kills roots and stops their regrowth
If mixing ball fails to rattle DO NOT STRIKE CAN
L L Building Products SSB960AW "Gaf/Master Flow" Slant Back Roof Louver, White Finish BF20 Hydraulic cement"LL BUILDING PRODUCTS" GAF MASTER FLOW ROOF VENT White finish Slant back louver Aluminum material resists rust. Fully enclosed hood to help prevent rodent insect infiltration and leaf pine needle clogging. Embossed finish hides scratches and resists wear. 12 percent larger flashing with pre drilled nail holes makes installation easier, helps prevent leaks. 9 7 8" opening; 18" x 201 2 flashing dimension. 60 sq. in. of net free ventilating area per
