Aztec Washer #1 Shingle Roof Silicone Pipe Flashing Boot, Red Crosby® 419 Blocks Ideal for roofing

Ideal for roofing

The 45-count bulk pack is ideal for fleets and high-use applications

The reinforced aluminum base is engineered to contour under or around roof coverings

Follow Manufacturer Guidelines: Maintain correct spacing and alignment per framing best practices and building codes

Aztec Washer #1 Shingle Roof Silicone Pipe Flashing Boot, Red Crosby® 419 Blocks Ideal for roofingThe #1 Shingle Roof Silicone Pipe Flashing Boot, Red delivers high performance sealing for shingle roof penetrations. Made from high temperature red silicone, this flashing boot resists extreme heat, UV exposure, and ozone, making it ideal for rooftops with harsh sun or elevated thermal demands. Its conical design with pre notched steps allows for a precise fit around pipes of various diameters. Whether you're working with vent stacks, HVAC piping, or