SpecSeal AS200 Elastomeric Spray is a latex-based elastomeric firestop spray for construction joints and perimeter fire barrier applications. AS200 cures to form a durable seal that resists the passage of the products of combustion while accommodating for high dynamic joint movement.
Features:
Applied with airless spray equipment
Highly flexible to accommodate for dynamic joint conditions
Tested for up to 4 Hour fire-resistance rating when tested to ASTM E1966/UL 2079
Listed in over 100 UL Tested Curtain Wall Systems
Video: https://youtu.be/ayXhuWJCA30
I have 10 buckets. If you get all 10, your price is $600.