3M Firestop Equivalents & Alternatives
Switching from 3M fire protection? Every 3M firestop product has a UL-tested Metacaulk® (RectorSeal) equivalent — same performance class, distributor pricing, same-day shipping from New Jersey. 18 product categories cross-referenced below, with free submittal support when your job specs 3M.
| 3M Product | Metacaulk® Equivalent | Why contractors switch |
|---|---|---|
CP 25 WB+ Intumescent Caulk | Metacaulk 1000General-purpose intumescent, UL up to 4hr, STC 62 | MC 1000 offers the best balance of price and performance for general intumescent needs. |
IC15 WB+ FireDam 150+ Multi-Purpose Caulk | Metacaulk 150+All-purpose, STC 65, Buy America compliant | MC 150+ covers the most UL systems of any single sealant. Best value for general contractors. |
FireDam 150+ Elastomeric | MC 1200Ultra-flexible, CG/SL/Spray, red/white/gray | MC 1200 uniquely offers caulk grade, self-leveling, AND spray formulations. |
WT 1000 NS / FB 2000+ / 3000 WT Silicone Caulk | Metacaulk 835+Silicone-based, Class 25 movement, ASTM C920 | 835+ offers true silicone performance with Class 25 movement capability. |
FB 1003 SL Silicone Self-Leveling | Metacaulk 835+ SLSelf-leveling silicone for floor penetrations | Self-leveling silicone for horizontal joints. Apply and walk away. |
FB Rated Foam FIP Foam Firestop | RS136 SmokeBlockEconomical foam firestop | RS136 is the budget-friendly option for basic through-penetrations. |
FireBlock Foam FB Foam / Draft / FireBlock | Draft Block OrangeOrange foam for draft stopping | Draft Block Orange targets residential/light commercial draft stopping. |
FB WT Spray Silicone Spray | Metacaulk 835+ SprayFast-cure spray silicone | 835+ Spray offers fast-cure spray application for large area coverage. |
Firedam 200 Spray / 3M Tape Spray Mastic | Metacaulk 1200 SprayElastomeric spray mastic | MC 1200 Spray covers large areas fast. Available in red and white. |
MPS-2+ Putty Sticks | MC FRS Putty StickMoldable intumescent putty | FRS Putty Sticks are moldable — perfect for irregular openings. |
MPP-4S+ Putty Pads | MC FRP Putty PadsSelf-adhesive pads for electrical boxes | Fastest way to firestop electrical boxes. Available in 6x7, 7x7, 9x9. |
Fire Collar Pipe Collars | Intumescent CollarsSteel collars, 1.5-6 inches | Available in 5 sizes for PVC, CPVC, ABS, PP, PE pipes. |
Fire Barrier Pillow Firestop Pillows | Firestop PillowsRe-enterable, 2 and 3 inch | Re-enterable — pull out, add cables, put back. No re-caulking. |
Fire Barrier Strip Joint Strip | Joint StripIntumescent strip, 1-4 inch widths, 82ft rolls | 82-foot rolls for head-of-wall and perimeter joints. |
Fire Barrier Wrap Wrap Strip | Wrap StripIntumescent wrap for plastic pipes | Wrap around plastic pipes before sealing. Expands in fire to seal. |
CS-195+ Composite Sheet | Composite Sheet36x36 inch firestop board, up to 3hr | Cut with standard tools. Use with sealants for large openings. |
Fire Barrier Mortar Fire-Rated Mortar | FRM Mortar45lb bag, just add water, up to 3hr | Go-to for large floor openings. 1 bag = 1 cubic foot. |
Cable Coating Cable Coating | C70 Cable CoatingIndustrial spray/brush, gray and white | Designed for industrial cable tray protection. Spray or brush. |
Note: Cross-reference is general guidance — always verify the specific UL system for your assembly. Job specs 3M? We provide UL system documentation and submittal support free — call (732) 757-4552 or email sales@firestop-usa.com.
3M equivalents — frequently asked
What is the Metacaulk equivalent to 3M CP 25 WB+?
Metacaulk 1000 — General-purpose intumescent, UL up to 4hr, STC 62. MC 1000 offers the best balance of price and performance for general intumescent needs.
What is the Metacaulk equivalent to 3M IC15 WB+ / FireDam 150+?
Metacaulk 150+ — All-purpose, STC 65, Buy America compliant. MC 150+ covers the most UL systems of any single sealant. Best value for general contractors.
What is the Metacaulk equivalent to 3M FireDam 150+?
MC 1200 — Ultra-flexible, CG/SL/Spray, red/white/gray. MC 1200 uniquely offers caulk grade, self-leveling, AND spray formulations.
What is the Metacaulk equivalent to 3M WT 1000 NS / FB 2000+ / 3000 WT?
Metacaulk 835+ — Silicone-based, Class 25 movement, ASTM C920. 835+ offers true silicone performance with Class 25 movement capability.
What is the Metacaulk equivalent to 3M FB 1003 SL?
Metacaulk 835+ SL — Self-leveling silicone for floor penetrations. Self-leveling silicone for horizontal joints. Apply and walk away.
What is the Metacaulk equivalent to 3M FB Rated Foam FIP?
RS136 SmokeBlock — Economical foam firestop. RS136 is the budget-friendly option for basic through-penetrations.
What is the Metacaulk equivalent to 3M FireBlock Foam FB?
Draft Block Orange — Orange foam for draft stopping. Draft Block Orange targets residential/light commercial draft stopping.
What is the Metacaulk equivalent to 3M FB WT Spray?
Metacaulk 835+ Spray — Fast-cure spray silicone. 835+ Spray offers fast-cure spray application for large area coverage.
What is the Metacaulk equivalent to 3M Firedam 200 Spray / 3M Tape?
Metacaulk 1200 Spray — Elastomeric spray mastic. MC 1200 Spray covers large areas fast. Available in red and white.
What is the Metacaulk equivalent to 3M MPS-2+?
MC FRS Putty Stick — Moldable intumescent putty. FRS Putty Sticks are moldable — perfect for irregular openings.
What is the Metacaulk equivalent to 3M MPP-4S+?
MC FRP Putty Pads — Self-adhesive pads for electrical boxes. Fastest way to firestop electrical boxes. Available in 6x7, 7x7, 9x9.
What is the Metacaulk equivalent to 3M Fire Collar?
Intumescent Collars — Steel collars, 1.5-6 inches. Available in 5 sizes for PVC, CPVC, ABS, PP, PE pipes.
Is Metacaulk a good alternative to 3M firestop?
Yes. Metacaulk (manufactured by RectorSeal) offers UL Classified equivalents for 3M fire protection products across sealants, sprays, collars, wraps, putty, devices and mortar — typically at meaningfully lower cost. Always verify the specific UL system for your assembly; our team can help match systems.
Can I substitute Metacaulk on a job that specs 3M?
In most cases, yes — when the substitution is approved through a submittal showing an equivalent UL Classified system. Firestop-USA provides product data, UL system documentation and submittal support at no charge. Call (732) 757-4552 and we'll match the system.
Do you offer distributor pricing and fast shipping?
Yes — Firestop-USA is an authorized Metacaulk master distributor: distributor pricing, volume discounts, same-day shipping on in-stock items ordered before 11 AM, and free freight over $2,500, shipping nationwide from New Jersey.
Ready to switch from 3M?
Distributor pricing, same-day shipping before 11 AM, free freight over $2,500, and free submittal support — from an authorized Metacaulk master distributor.
Also switching from Hilti firestop or STI firestop? See the complete cross-reference chart.