Flashers #8 Silicone High Temp Roof Jack Pipe Boot - Durable Seal

In this review of the Flashers #8 Silicone High Temp Roof Jack pipe boot, the bottom line is simple: this is a practical, heavy-duty flashing for contractors and homeowners who need a reliable seal on metal roofing around 7' to 13' pipe OD. The standout reason to buy is the silicone construction rated from -100 to +450 degrees F, which resists cracking, heat and vibration better than many rubber alternatives. The unit is made in the USA and is clearly aimed at installers who want a no-fuss flashing that can be cut to size and conformed to ribbed metal profiles.

Key Features

• Made in the USA: Manufacturer direct production ensures domestic quality control and consistent materials used in each flashing.
• High temperature range: Silicone material services a continuous range of -100 to +450 degrees F, giving confidence on hot roofs and near heat sources.
• Flexible fit: The silicone cone and heavy rubber fold allow the flashing to conform to roof pitch and metal profile ribs without cracking.
• Easy customization: Pipe dimensions are marked in inches and millimeters so the cone can be trimmed quickly with tin snips or scissors for a precise fit.
• Simple installation: No special tools or complicated methods are required, making it suitable for one-person installs and retrofit work.
• Code compliance: The product line holds a Certificate of Listing with IAPMO R&T and complies with UPC and IPC plumbing codes.

Who It's For

This flashing is best for roofing contractors, HVAC technicians, and experienced DIYers working on metal roofs who need a heat-resistant, flexible seal around vent and pipe penetrations. Its wide temperature tolerance and flexible silicone make it especially useful for applications near exhausts or where thermal cycling and vibration are concerns.

It is less suited for those who need decorative finishes or painted color matches; the product is a function-first flashing rather than an aesthetic trim piece. Also, buyers who require pre-formed flanges for shingle roofs should look at shingle-specific boots instead.

Pros & Cons

Pros

• Durable silicone resists heat and cracking, maintaining a long-lasting seal under extreme temperatures.
• Flexible design conforms to metal rib lines and varying pitches, reducing gaps and leaks on corrugated panels.
• Clear size markings make trimming to exact pipe OD fast and accurate for installers.

Cons

• Appearance is utilitarian and may not match finished roofing trims for visible installations.
• May require manual shaping on very irregular roof profiles to achieve a perfect seal.

Specifications

Brand	Jackman Industries, Inc.
Material	High temp silicone with aluminum ring base
Pipe OD range	7' to 13'
Temperature rating	-100 to +450 degrees F continuous
Compliance	IAPMO R&T certificate; UPC and IPC compliance
Made	100% Made in the USA

Our Verdict

The Flashers #8 silicone roof jack is a sensible purchase for professionals and capable DIYers who prioritize durability and thermal performance. Its wide temperature tolerance, flexible fit, and ease of trimming make it a good value for metal roof penetrations where a reliable, code-listed seal is required.

Frequently Asked Questions

Can this flashing handle high exhaust temperatures?
Yes. The silicone is rated to +450 degrees F continuous, so it performs well near high heat sources within that range.

Will it fit ribbed metal roofing?
Yes. The heavy rubber fold and aluminum ring at the base allow it to conform to metal profiles and rib lines when shaped during installation.

Do I need special tools to install?
No. Flashers require no special tools and can be trimmed with tin snips or scissors using the printed size markings.