SIWIN, a globally leading manufacturer of organosilanes for over 15 years, specializes in producing acetoxy silane-based crosslinkers used in the formulation of acetoxy moisture-curing silicone sealants. These silane compounds enable the crosslinking of hydroxy-functionalized silicone polymers into silicone elastomers under the influence of a catalyst and moisture.

Acetoxy silicone sealants are known for their strong adhesion to various substrates, fast curing times, short tack-free times, and cost-effectiveness. SIWIN offers high-quality acetoxy silanes, such as VTAS silane, which are widely applied in sealing kitchens, bathrooms, and other indoor areas.

During curing, these sealants release acetic acid, resulting in a characteristic vinegar-like smell. This acid can corrode certain materials, such as metals, sensitive electronic components, and natural stone, leading to discoloration or damage. As a result, acetoxy-based sealants are not recommended for these sensitive applications compared to neutral curing sealants.

SIWIN provides both pure acetoxy silanes and customized blends, tailored for use in corresponding formulations. Key product offerings include:

SIWIN-AT102 (Methyltriacetoxysilane, MTA)

SIWIN-AT402 (Ethyltriacetoxysilane, ETA)

SIWIN-AT302 (Propyltriacetoxysilane, PTAS silane)

Additionally, SIWIN-AT024 (di-tertbutoxy-diacetoxysilane) serves as an effective adhesion promoter for acetoxy crosslinking RTV-1 sealants.

For superior performance in acetoxy sealant formulations, SIWIN’s acetoxy silanes provide reliable solutions to meet a wide range of sealing and adhesion requirements.