Does the tape get coated over?

On a coating job, yes. Butyl seam tape is listed for seams, flashings, penetrations and details beneath the system, so the base coat and finish coats run over it. The fleece-backed MS hybrid bonding tape is the one listed as not needing a coat over it.

Tape or fabric at a seam?

Tape goes down dry and is fast on a straight run. Fabric is bedded into a wet coat and builds film with it. Plenty of roofs use tape on fastener rows and fabric at flashings.

For screw lines and tight laps. Where the seam profile is taller or the joint has opened up, the 4, 6 and 8 in rolls are the same tape in a wider format.

How much does a case cover?

Twelve rolls at 50 ft is 600 linear feet before overlaps at roll ends. Count the fastener rows and seams, add the overlaps, and the quote works out the cases.

Can it go on a Hypalon roof?

Yes. The butyl seam tape is listed for EPDM and CSPE Hypalon roofs, coated over with the elastomeric the same day. It is the only detail product in our catalogue the manufacturer lists for Hypalon: none of our cartridge sealants names it, so on Hypalon the sealant is confirmed with the manufacturer's technical service and an adhesion test before the order. Tell us the membrane type.

By the case, through the quote form with the part number, the quantity, the site ZIP and your dates. Stocked tape ships in 1 to 3 business days.

Reinforcing fabrics & seam tapes

KST020802 Uniflex Butyl Seam Tape, 2 in × 50 ft

Seam tape
2 in × 50 ft
Sold by the case

The narrowest butyl seam tape in the Uniflex range, 2 in wide on a 50 ft roll and packed twelve rolls to the case. Self-adhering butyl goes down dry, so a fastener row or a tight seam is closed in one pass without waiting on a wet coat.

Key benefits

Two inches is the fastener-row and tight-seam width, where a wider tape would only be trimmed back
Self-adhering butyl rubber, so the detail is closed dry rather than bedded into a wet coat
Twelve 50 ft rolls to the case, which is 600 linear feet of detail work per box
Listed by the maker for seams, flashings, penetrations and other roof details
Held in stock beside the primers and base coats that go over it

Priced per project

Send the quantity and the delivery ZIP. We reply within one business day.

Request a quote Ask a question about this product

In stock Confirm the quote, and your order ships in 1–3 business days from confirmation.

A person prepares every quote. We reply within one business day.
Support Monday to Friday, 9am–5pm Eastern
Shipping & returns

Overview

Most of what fails on a metal roof is a line, not an area. A screw row, a lock seam, a termination bar: long, narrow, and tedious to detail with anything wet. Self-adhering butyl tape closes those lines dry, and KST020802 is the narrow one, 2 in wide on a 50 ft roll with twelve rolls to the case.

Two inches is deliberate. It reaches across a fastener row or a low-profile lap and no further, so a crew is not paying for material that gets trimmed off. Where the seam stands taller or a joint has opened, the same butyl comes as KST020804 at 4 in, KST020806 at 6 in and KST020808 at 8 in.

Application

The surface has to be clean, dry and sound. Butyl sticks to sound metal and coating, not to dust, oil or rust scale.
Prime by substrate where the system calls for it, with a metal primer on panels and gutters or, on EPDM only, the wash primer.
Details come first in the order of work. Tape the fastener rows and seams, then fabric the wider flashings, then coat the field.
Roll the tape down under pressure along its whole length and lap the ends. A hand roller matters more with butyl than with fabric.
Follow the manufacturer’s product data sheet for surface preparation, temperature limits and what may be applied over the tape and when.

Ordering

KST020802 is sold by the case of twelve 2 in × 50 ft rolls. Stocked cases ship in 1 to 3 business days, and anything off the shelf is ordered in on a 1 to 2 week lead. Pallet quantities, and the pails, drums or totes traveling with them, go on a freight quote through the quote form with the part numbers, quantities, site ZIP and your dates. Every price is quoted per project.

Where it's used

Fastener rows on metal panels

Screw lines down a panel roof, taped in a straight run before the base coat instead of dressing every head by hand.
Tight panel seams

Low-profile side laps and lock seams on metal roofs, where 2 in reaches both sides of the joint and nothing more.
Small penetrations

Conduit, cable and small vent pipes, where a narrow tape can be wound around the stack and dressed into the flat.
Flashing edges and terminations

Termination bars, reglet edges and counterflashing lines that need a closed edge before the coats go on.
Detail prep before coating

Any roof detail that has to be sealed dry so the coating crew is not waiting for a three-course pass to set up.

Specifications

Specifications: KST020802 Uniflex Butyl Seam Tape, 2 in × 50 ft
Manufacturer	Sherwin-Williams (Uniflex line)
Part number	KST020802
Color	Not listed in our catalog data; the manufacturer's product data sheet states it
Pack sizes	2 in × 50 ft roll

Performance
Technology	Self-adhering butyl rubber tape
Roll size	2 in × 50 ft
Case quantity	12 rolls per case
Recommended substrates	Roof seams, flashings, penetrations and other roof details, including EPDM and CSPE Hypalon roofs
Role in the system	Self-adhering detail reinforcement that goes down dry before the coating

Ordering
SKU	CY-KST020802
Sold by	Case
Lead time	In stock · 1–3 business days
Warranty	Goods are warranted to match their description and to be free of manufacturing defects when delivered; any manufacturer system warranty is issued by the manufacturer under its own terms

Delivery and lead time

Ships in 1–3 business days from order confirmation. Your quote states the delivery window before you commit.
Pails, rolls and cartons ship by parcel or pallet; drums and totes by freight to your site. Tell us about lift-gate, access or unloading needs when you ask for a quote.

Shipping & returns

How to order

Send the quantity, the site ZIP and your timing.
A person sends one written quote with the delivered price and the ship window. We reply within one business day.
Confirm the quote, and your order ships in 1–3 business days from confirmation.

Request a quote

Questions

Does the tape get coated over?: On a coating job, yes. Butyl seam tape is listed for seams, flashings, penetrations and details beneath the system, so the base coat and finish coats run over it. The fleece-backed MS hybrid bonding tape is the one listed as not needing a coat over it.
Tape or fabric at a seam?: Tape goes down dry and is fast on a straight run. Fabric is bedded into a wet coat and builds film with it. Plenty of roofs use tape on fastener rows and fabric at flashings.
Why the 2 in width?: For screw lines and tight laps. Where the seam profile is taller or the joint has opened up, the 4, 6 and 8 in rolls are the same tape in a wider format.
How much does a case cover?: Twelve rolls at 50 ft is 600 linear feet before overlaps at roll ends. Count the fastener rows and seams, add the overlaps, and the quote works out the cases.
Can it go on a Hypalon roof?: Yes. The butyl seam tape is listed for EPDM and CSPE Hypalon roofs, coated over with the elastomeric the same day. It is the only detail product in our catalogue the manufacturer lists for Hypalon: none of our cartridge sealants names it, so on Hypalon the sealant is confirmed with the manufacturer's technical service and an adhesion test before the order. Tell us the membrane type.
How is it ordered?: By the case, through the quote form with the part number, the quantity, the site ZIP and your dates. Stocked tape ships in 1 to 3 business days.