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Curtain Wall Joint Sealant

RectorSeal® has added a sprayable, silicone-based curtain wall joint sealant to its Metacaulk® 835+ elastomeric firestop sealant product line. The Metacaulk 835+ Spray is one of the construction industry’s most quick-curing and resilient silicone-based firestop sealants with elastomeric characteristics that aren’t compromised by seismic movement, rainfall, weather and other jobsite conditions.


The easy-applying Metacaulk 835+ Spray is the perfect balance between spray-ability, pot life and flow-able viscosity. It outperforms the competition with its non-sag characteristics, resiliency, 30- to 60-minute tack time and quick 24-hour cure time (depending on ambient temperature). It’s manufactured in a concrete-matching gray color and is available in an easy-handling 5-gal pail.


Metacaulk 835+ Spray carries a Class I W-rating and is tested in accordance with ASTM E1966 (UL 2079), ASTM E2307, ASTM E90 and ASTM E1399. It meets Type S, Grade P, Class 25, Use NT, M, G, A, O. Metacaulk 835+ Spray can be applied on any interior/exterior curtain wall joint.


After the curtain wall joint is prepared and filled with mineral wool, the sealant is applied with an airless sprayer and features a non-slumping formation with a delayed reactivity onset for improved workability. Applications don’t require priming on most building materials. Metacaulk 835+ Spray is tested and proven to seal joints from fire and smoke.


The new spray complements the existing product line of Metacaulk 835+ elastomeric joint sealants that are available in a 5-gal pail or 10.15-oz caulk cartridge or 20.2-oz self-leveling or caulk grade sausage packs.,

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