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Mfr:STI Firestop

SpecSeal Fyre Flange Splice Kit

Item #: SSFFS22.BAG*NA

Mfr. Part #: FFS22


FyreFlange Firestop Angles consist of galvanized steel retaining angles with a layer of bonded intumescent material designed to be installed around the perimeter of non-dampered square or rectangular steel ducts. Powder coated red for easy inspection and identification; Fyre...

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Available: 1

Case Quantity: 1



San Diego






Salt Lake




San Marcos


(*) Minimum Quantity: 1

About This Product


FyreFlange Firestop Angles consist of galvanized steel retaining angles with a layer of bonded intumescent material designed to be installed around the perimeter of non-dampered square or rectangular steel ducts. Powder coated red for easy inspection and identification; FyreFlange Firestop Angles meet the exacting criteria of ASTM E814 (UL1479) and CAN/ULC S115.

Unlike traditional duct firestopping methods utilizing backer or packing materials, sealants, and angles installed and inspected in stages, FyreFlange Firestop Angle can be installed as the duct is installed and inspected just once after the installation is complete. FyreFlange is available as a pre-firestopped angle or as intumescent gasketing for field fabrication with 2 in (51 mm) by 2 in (51 mm) min 20 GA (or heavier) steel angles.

  • Single stage installation
  • Economical—saves labor
  • No additional firestop or backing material required
  • Powder coated red for easy identification and inspection
  • Eliminates the need for sealants and forming materials
  • Easily installs around bare and insulated rectangular ductwork


  • Duct

FyreFlange Firestop Angles are engineered for use with steel ducts up to 92 in (234 cm) by 96 in (244 cm) installed through barriers rated up to and including 2 hours tested designs include options for non-insulated duct as well as ducts insulated with up to 2 in (51 mm) thick 3/4 pcf (12 kg/m cu) glass fiber duct wrap.


The fire-rated retaining angles shall consist of powder coated galvanized steel angles with a bonded intumescent gasket and an integral corner clip assembly to join angle sections together. The fire-rated retaining angles shall provide a minimum 15x free expansion and shall contain no water soluble expansion ingredients. Fire-rated retaining angles shall be UL Certified and tested to the requirements of ASTM E814 (UL1479) and CAN/ULC-S115.

Test Standards

  • ASTM E814 (UL1479)
  • CAN/ULC-S115

Specified Divisions

  • Division 7, 07 84 13, Penetration Firestopping
  • Division 22, 22 00 00, Plumbing
  • Division 23, 23 00 00, HVAC


FyreFlange HVAC Firestop Angle Documents


FyreFlange HVAC Firestop Angle Specifications

Shipping & Returns

Sunshine Supply prides itself on providing only the best waterproofing products to the construction industry. Unfortunately, products we offer may not always meet our customers expectations. If this is the case, we are happy to accept your return and help you find a product that better fits your needs. (see return policy below)

If the reason for your return is a result of a mistake made by Sunshine Supply, we will provide a full product refund along with all tax, shipping, and handling fees applicable to your sale. Return shipping, if necessary, will be processed and scheduled by Sunshine Supply. Please, do not send back your products without consulting a customer service representative first to ensure a quick and easy refund.

Please inform Sunshine Supply immediately if any of your items are missing or damaged upon arrival. Make sure to notate all damages on the shipping receiver from our carriers or Sunshine Supply’s packing slip.

In the event we are unable to accept return of a product due to damage or leaking material. Sunshine Supply will provide a full refund, assuming it meets eligibility of our return policy, but expect the customer to dispose of the materials following all Southern California disposal guidelines.

Returns are fast and easy, but we do have a couple exceptions for products to be eligible for return. The exceptions are as follows:

  • The original purchase date must be 30 days or less. Returns may be subject, but not limited to, a 20% restock fee if the return is made after 30 days. Returns older than 60 days will not be accepted.
  • The product is in original, unopened manufactures packaging.
  • The product is not expired or close to its expiration date.
  • If applicable, product lot/batch number is clearly visible and matching the original sale lot/batch number.
  • Not all returns are the same and it is difficult to outline every instance that meets return eligibility. If your return does not meet the requirements above please give us a call and we will attempt to remedy the situation in some other way. The satisfaction of our customers is Sunshine Supply’s top concern.

Here is some legal jargon from our Terms and Conditions:


Sunshine Supply Co., Inc. is under no obligation to accept return of products purchased by customer whether or not they are special order. Sunshine Supply Co., Inc. may, in its sole discretion, accept a return of products and provide a credit to the customer’s account if (I) the products were purchased from Sunshine Supply Co., Inc., (II) the product is not visibly defective or impaired or have expired expiration dates, (III) the product is returned within thirty (30) days of the date of sale, and (IV) the product is in the original manufacturer’s packaging with Lot/Batch number clearly legible and matching the original sale. If Sunshine Supply Co., Inc. accepts the return of product, a restocking fee of 20% of the purchase price shall be deducted from all credited amounts from all stock, non-stock, or special order product. Additional limitations or costs may be imposed upon their return including those required by the manufacturer of the product.

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