STI - Firestop Authority
STI CD40108 Cast-In Firestop Device - 4" x 8"
1 product option
View options & quoteAll QXO products & supplies
STI - Firestop Authority Repair and protection
Browse the full supplier catalog, including installation accessories, tools, and trade supplies.
Need a hand choosing?
Tell us about your project. Our team can help with materials and quantities.
Get a free quote35 products
Clear filters
STI - Firestop Authority
STI CF34 Closet Flange Firestop Gasket for 3" or 4" Pipe
1 product option
View options & quote
STI - Firestop Authority
STI CS3636 SpecSeal Composite Sheet - 36" x 36"
1 product option
View options & quote
STI - Firestop Authority
STI EP44 SpecSeal EP Powershield Electrical Box Insert - 3-3/4" x 3-3/4"
1 product option
View options & quote
STI - Firestop Authority
STI ES105 Elastomeric Firestop Sealant - Blue - 5 Gallon Pail
1 product option
View options & quote
STI - Firestop Authority
STI ES105 Elastomeric Firestop Sealant - Light Gray - 5 Gallon Pail
1 product option
View options & quote
STI - Firestop Authority
STI ES105R Elastomeric Firestop Sealant - Red - 5 Gallon Pail
1 product option
View options & quote
STI - Firestop Authority
STI ES120PB - Elastomeric Firestop Sealant - Pale Blue - 20 Oz. Sausage
1 product option
View options & quote
STI - Firestop Authority
STI EW2420 E-Wrap Endothermic Wrap - 2' x 20"
1 product option
View options & quote
STI - Firestop Authority
STI LC150 Endothermic Firestop Sealant - 10 Oz. Tube
1 product option
View options & quote
STI - Firestop Authority
STI LC155 Endothermic Firestop Sealant - 5 Gallon Pail
1 product option
View options & quote
STI - Firestop Authority
STI RTC350 RTC Range Taking Firestop Collar for 3" or 4" Pipe
1 product option
View options & quote
STI - Firestop Authority
STI SIL300 Silicone Firestop Sealant - 10 Oz. Tube
1 product option
View options & quote
STI - Firestop Authority
STI SIL305 Self-Leveling Silicone Firestop Sealant - 5 Gallon Pail
1 product option
View options & quote
STI - Firestop Authority
STI SIL320 Silicone Firestop Sealant - 20 Oz. Sausage
1 product option
View options & quote
STI - Firestop Authority
STI SIL320SL Self-Leveling Silicone Firestop Sealant - 20 Oz. Sausage
1 product option
View options & quote
STI - Firestop Authority
STI SNS120W Smoke & Sound Acoustical Sealant - 20 Oz. Sausage
1 product option
View options & quote
STI - Firestop Authority
STI SSM22B SpecSeal SSM Firestop Mortar - 22 Lb. Bag
1 product option
View options & quote
STI - Firestop Authority
STI SSW RC Restricting Collar for BLU & BLU2 Wrap Strip - 25' Roll
1 product option
View options & quote
STI - Firestop Authority
STI SSW RC2 Restricting Collar for RED & RED2 Wrap Strip - 25' Roll
1 product option
View options & quote
STI - Firestop Authority
STI SSW125 Gray Wrap Strip Precut for 2" Pipe
1 product option
View options & quote
STI - Firestop Authority
STI SSW250 Gray Wrap Strip Precut for 3" Pipe
1 product option
View options & quote
STI - Firestop Authority
STI SSW375 Gray Wrap Strip Precut for 4" Pipe
1 product option
View options & quoteFrom product selection to a finished project.
Get help with samples, system compatibility, and installation.
Planning a home exterior project?
Back to homeowner materials →