Aztec Washer #1 Shingle Roof Silicone Pipe Flashing Boot, Red Crosby® 419 Blocks Multiple Configurations: Available in a

Multiple Configurations: Available in a variety of diameters

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

consistency

If you have nominal lumber

SC clips are often welded to the structure in high-seismic zones

Aztec Washer #1 Shingle Roof Silicone Pipe Flashing Boot, Red Crosby® 419 Blocks Multiple Configurations: Available in aThe #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