Metacaulk 835+ is a 1-component, fire-rated elastomeric silicone sealant for through penetration firestops.

Prevents flames/smoke/gas/water spreading through penetration openings. Silicone based - use in systems where dynamic movement is expected.

• STC rating 55 as well as FBC System Compatible- indicates that product has been tested and is monitored on an ongoing basis to assure chemical compatibility with Flow Guard Gold, Blaze Master and Corzan pipe and fittings.
• A single component penetration sealant system - no mixing or required additives needed.
• Flexible and non-slump formula. Neutral, moisture cure and low odor. Excellent moisture resistance. Protected in wet & dry stages against mold growth with a combination of biocides.
• D O T Classification is not regulated.
• Use in interior or exterior expansion, contraction and control joints. Use in exterior and interior penetrations. Available in 2 grades: caulk grade & self-leveling. Applied with a conventional caulking gun, trowel or with pumping equipment.