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Mfr:STI Firestop

SpecSeal SSCF34 Closet Flange Gasket

Item #: SSCF34.EA*NA

Mfr. Part #: CF34


The SpecSeal Closet Flange Firestop Gasket is a one-piece, molded rubber, intumescent pad that installs beneath a 3 in (76 mm) or 4 in (102 mm) closet flange to effectively firestop the opening. The die cut rubber gasket is perforated to delineate removable inserts sized to ...

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In Stock

Available: 10

Case Quantity: 10



San Diego






Salt Lake




San Marcos


(*) Minimum Quantity: 1

About This Product


The SpecSeal Closet Flange Firestop Gasket is a one-piece, molded rubber, intumescent pad that installs beneath a 3 in (76 mm) or 4 in (102 mm) closet flange to effectively firestop the opening. The die cut rubber gasket is perforated to delineate removable inserts sized to accommodate various outer diameters of toilet flanges.

Traditional firestopping methods require the firestop material to be applied around the pipe prior to setting the toilet flange, which can be problematic if the firestop material is not recessed a sufficient distance from the top to accommodate the throat of the flange. The alternative is to apply the firestopping from the underside of the floor, necessitating the use of ladders or lifts. SpecSeal Closet Flange Firestop Gaskets solve the problem by providing a labor-friendly method of properly firestopping the opening.

  • Seamless fit for fast, easy installation with no tools requiredz
  • Installs from the top, saving labor
  • No caulk to clean up
  • Always ready to use - no shelf life - no caulk tubes to dry out


  • Plastic Pipe
  • Metal Pipe

SpecSeal Closet Flange Firestop Gaskets are designed to allow the drain pipe connected to a toilet flange to be properly firestopped without the need for firestop caulk for typical floor assemblies with plastic or metal pipes.


The firestop system for the toilet flange shall be a molded, one-piece intumescent gasket with removable inserts to accommodate various outer diameters of toilet f langes certified by Underwriters Laboratories Inc. (UL) as a fill, void, or cavity material when tested to ASTM E814 (ANSI/UL1479) or CAN/ULC-S115 for up to a 2 hr. rating.

Test Standards

  • ASTM E814 (ANSI/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

Product Video


CF Closet Flange Firestop Gasket Documents


CF Closet Flange Firestop Gasket 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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