Metacaulk® 835+ Firestop Silicone Sealant

Metacaulk® 835+ Firestop Silicone Sealant


  • Exterior / Interior use
  • Weather/chemical resistant
  • Excellent moisture resistance
  • STC rating 55
  • Meets ASTM C920, Type S, Grade NS, Class 25, Use NT, M, G, A, O
  • Download Image
Categories: ,

Metacaulk® 835+ is for applications that require a silicone-based firestop. Designed for use with PVC pipe on closed (pressure) systems, EMT, insulated and uninsulated steel pipe, construction and control joints and interior expansion joints. Flexible, non-sag and low odor sealant for exterior or interior use. Used in systems where dynamic movement is expected. Application temperature -20°F to 120°F. Sound Transmission Class (STC) rating 55, The test was performed in accordance with ASTM E 90, Standard Test Method for Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions and Elements.


FBC System Compatible indicates that this product has been tested, and is monitored on an ongoing basis, to assure its chemical compatibility with FlowGuard Gold®, BlazeMaster® and Corzan® pipe and fittings. FBC, FlowGuard Gold®, BlazeMaster® and Corzan® are licensed trademarks of The Lubrizol Corporation.


Product Codes And Case Sizes
Product Code
SizeQuantityUPCInterleavedDimensionsCubic Feet
66645 10.15oz cartridge 12 021449666459 10021449666456 8x6x12 .34
66019 5 Gallon 1021449660198 NA13 diax14 1.08
6630020.2 oz sausage caulk grade12021449663007100214496630049x14x7.51
6630120.2 oz sausage self leveling12021449663014100214496630119x14x7.51