SPEC MIX® Fiber Base Coat (18009 and Bulk SM18009) is a dry, preblended cement based stucco engineered with proprietary admixtures and fibers that are computer batched for consistency and performance unmatched by traditional field mixed stucco.
Designed for both One Coat and traditional Scratch & Brown Coat systems, it reduces shrinkage and increases long term durability and bond strength of the application.
When gun or hand applied by a qualified applicator, it is approved by the International Code Council (ICC) as a one-hour fire rated wall when applied as a One Coat application, ESR 3018.
It has a custom blended sand gradation that increases the wall flexural strength while reducing cracking and crazing.
The custom sand gradation also provides excellent workability and finishing properties for the applicator over a traditional field-mixed source.