The best metal roof chimney flashing kit depends mainly on the pipe’s outside diameter, roof profile, and the pipe’s operating temperature. The products below are flexible pipe-flashing boots for metal roofs, not complete chimney systems. Choose the Fasteners Plus kit if you need included installation hardware for a smaller pipe, the #6 boot for a mid-size pipe, or a #8 boot for a larger pipe. Confirm every measurement and temperature limit before buying.
| Product | Best For | Listed Pipe Diameter |
|---|---|---|
| Fasteners Plus #3 EPDM Boot | Small pipes and included install kit | 1/4–5-3/4 inches |
| #6 High-Temp Silicone Boot | Mid-size pipes | 5–9 inches |
| Sobalai #7 Flexible Boot | Corrugated roofs and larger pipes | Title: 6–9 inches; features: 6–11 inches |
| VIVIDA #8 Silicone Boot | Large pipes and steep corrugated roofs | 7–13 inches |
| Sobalai #8 Flexible Boot | Large pipes with marked sizing | 7–13 inches |
Fasteners Plus #3 EPDM Boot With Install Kit
Best for: Smaller pipe penetrations when having installation items in one package is useful. This square EPDM boot fits pipe outside diameters from 1/4 to 5-3/4 inches and has an 8-inch-wide base. The listed kit includes sealant, 30 stitch screws, and a magnetic nutsetter in addition to the flashing.
The flexible aluminum base is designed to conform to metal roof configurations. EPDM is rated for continuous temperatures up to 212°F and intermittent temperatures up to 275°F, according to the product details. Choose this option if its temperature ratings suit the installation and you want the listed hardware included. Avoid it for pipes that exceed those limits.
#6 High-Temp Silicone Boot For 5–9-Inch Pipes
Best for: A metal-roof pipe with an outside diameter between 5 and 9 inches. The listing describes diameter markings for cutting and an accordion-style boot intended to fit around the pipe. Its flexible base is presented as a way to form a seal over corrugated roofing.
This is a straightforward size-range option if your measured pipe falls within the stated range. The product details do not provide a specific temperature limit, so confirm that it is appropriate for the pipe’s operating temperature before installation. The listing also mentions shingle-roof transitions, but check the actual roof profile and installation instructions rather than assuming a fit.
Sobalai #7 Flexible Metal Roofing Boot
Best for: Buyers needing a flexible base for a corrugated roof and a larger pipe opening. The listing describes a silicone boot with a flexible aluminum base and size markings intended to help guide trimming. It is presented for chimney pipes, furnace-top pipes, and other ventilation openings.
There is an important sizing discrepancy: the product name says 6–9 inches, while the feature text says 6–11 inches. Measure the pipe and confirm the applicable cut range with the seller before ordering. This uncertainty makes the product less suitable when the pipe is near either stated limit or an exact fit is essential.
VIVIDA #8 Silicone Boot For Steep Roofs
Best for: A 7–13-inch pipe on a corrugated roof, including roof pitches listed as 10/12 to 12/12. Its square flexible base is described as moldable to metal roof ribs, and the silicone boot can be cut to size. The product states a temperature range of -165.2°F to 446°F.
Choose this boot if the pipe diameter and temperature stay within the stated limits. Do not use it continuously above the listed temperature range, and avoid over-tightening screws, as the product instructions caution. Verify that the cut opening and base placement suit the roof profile before fastening.
Sobalai #8 Flexible Boot For 7–13-Inch Pipes
Best for: Larger pipe penetrations on corrugated metal roofing when diameter markings are useful during installation. The listing gives a 7–13-inch pipe range and describes a flexible aluminum base with corresponding size marks. It is intended for chimney pipes, furnace-top pipes, and other ventilation openings.
Compared with the VIVIDA #8, this listing emphasizes marked sizing and a flexible base but does not provide a numeric temperature range. Confirm the pipe’s heat exposure and the boot’s suitability before buying. The product details also advise checking the size before purchase, which is especially important for a large-diameter opening.
Buying Guide
How do you choose the correct flashing size?
Measure the pipe’s outside diameter, not its nominal trade size, and compare that measurement with the product’s stated range. A boot that is too small may not fit around the pipe; one that is too large may not seal as intended. When a listing has conflicting dimensions, such as the Sobalai #7, confirm the correct range before ordering.
Does the boot match your roof profile?
Look for a base designed to conform to the roof material and ribs. The listed products describe flexible bases for corrugated metal roofs, while the VIVIDA listing specifically mentions molding to corrugated ribs and steep roof pitches. Check the manufacturer’s installation guidance for your roof’s shape and slope.
What temperature rating should you check?
Compare the pipe’s operating temperature with the stated limit for the boot material. The Fasteners Plus product provides continuous and intermittent EPDM temperature ratings, and the VIVIDA product provides a silicone temperature range. Other listings do not give a numeric limit in the supplied details, so ask for clarification before use near a hot flue.
Do you need a complete kit?
Only the Fasteners Plus listing specifies included sealant, screws, and a magnetic nutsetter. The other products are described as flashing boots, so check whether fasteners, sealant, and other installation materials must be purchased separately. Follow the roof and flashing manufacturer’s instructions for fastening and sealing.
Frequently Asked Questions
Are these products complete chimney flashing kits?
They are pipe-flashing boots for roof penetrations. Only the Fasteners Plus listing specifies a set of installation accessories; none of the supplied product descriptions identifies a complete chimney system.
Can I use any boot on any metal roof?
No. Confirm that the base suits the roof profile, the pipe diameter is within range, and the product’s installation guidance matches the roof pitch and material.
Should I cut the boot before placing it?
Some listings describe diameter markings and a boot that can be cut to fit. Measure carefully and follow the product instructions; cutting too large an opening can compromise fit.
Which option includes installation hardware?
The Fasteners Plus #3 listing includes sealant, 30 stitch screws, and a magnetic nutsetter. The other supplied descriptions do not specify the same included items.
What should I do if the pipe is near the stated size limit?
Verify the exact usable range with the seller or manufacturer before purchase. This is particularly important when product details conflict or do not clarify the cut diameter.