Isobutyltriethoxysilane | Manta LB320

Manta LB320 is an undiluted isobutyltriethoxysilane. Its small molecular structure and stable branched isobutyl group allow deep penetration into porous cementitious and mineral surfaces.

In highly alkaline environments such as freshly cast concrete, it reacts with moisture to produce silanol groups that chemically bond with the substrate and build a durable, three-dimensional hydrophobic network. This internal treatment significantly reduces capillary water absorption while retaining the substrate's original appearance and breathability.

Its ethoxy groups liberate ethanol rather than methanol on reaction with moisture, which is a relevant selection factor for indoor infrastructure. Compared with Manta LO320, which carries a branched eight-carbon isooctyl group, LB320 has a shorter four-carbon isobutyl group, and its TDS also covers use as an external electron donor in polypropylene polymerization.

• Ziegler-Natta catalyst donor: external electron donor in Ziegler-Natta catalyst systems for polypropylene polymerization, providing stereoselectivity control for high isotacticity and good mechanical properties in the final polymer
• Architectural water repellent: deep-penetrating sealer for concrete, brick and natural stone that helps to limit freeze-thaw damage and chloride ion ingress, including in indoor infrastructure
• Mineral filler surface modification: inorganic pigments and mineral fillers such as ATH, silica and talc, improving filler dispersion and compatibility in non-polar polymer matrices

Supplied in 20 kg pail, 180 kg drum and 900 kg IBC.