Protectosil® CHEM-TRETE® PB 350

Clear, low-VOC 100% silane water repellent with catalyst designed for porous substrates.

PRODUCT OVERVIEW:

Protectosil® CHEM-TRETE® PB 350 is a clear, reactive, penetrating sealer for use on exterior above-grade concrete masonry units, brick masonry and most natural stones. This product provides resistance against water, alkali attack, acid rain and waterborne staining by penetrating into the substrate and chemically bonding with siliceous materials to form a permanent attachment of the water repellent molecule. Protectosil® CHEM-TRETE® PB 350 is especially suited for making porous substrates, such as split-face block, water repellent. This water repellent effect stands up against wind-driven rain.

APPLICATIONS:

Protects materials such as concrete masonry units (split-face, fluted or ground-faced blocks) from the ingress of wind-driven rain. Prevents moisture from entering and damaging interior walls and treated brick masonry, especially single wythe wall construction. Keeps masonry cleaner by reducing the amount of dirt and other pollutants that may absorb into the concrete. Other substrates that can be protected include sandstone,
terra-cotta, Saint Joe brick, hand-molded bricks and most natural stones.

Active Substance
Active Content
Solvent
Flash point
Density
VOC

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Technical Data Sheet

KEY FEATURES & BENIFIT

PRODUCT SPECIFICATIONS

PROPERTY	VALUE
Color	clear
Active Substance	alkyltrialkoxysilanes
Active Content	100% by weight
Solvent	none
Flash point	113°F
Density	7.6 lb/gal
VOC	<350 g/l max

Evonik is one of the world’s leading specialty chemicals companies. Protectosil® represents our commitment to innovation, quality, and long-term surface protection across industries.