Bis(3-triethoxysilylpropyl)amine

Bis(3-triethoxysilylpropyl)amine (CAS 13497-18-2) is a bifunctional aminosilane crosslinker used in professional-grade ceramic coatings at 1–5% concentrations. It serves as a bridge molecule: the two triethoxysilyl ends condense into the silica network while the central amine group enhances adhesion to the paint surface and may participate in additional cross-linking reactions.

Role in coating performance: The aminosilane crosslinker increases the density and flexibility of the cured silica network compared to a coating using only alkoxysilane monomers. This contributes to the coating's resistance to mechanical stress, its adhesion to varied clear coat formulations, and potentially to its longevity.

Health context: The H361 reproductive toxicity classification (suspected, Cat 2) carried by formulations containing this ingredient at the mixture level is a meaningful health signal. This classification is at Cat 2 (suspected), not Cat 1A/1B (known), but reproductive toxicants warrant careful handling regardless of tier. Importantly, this amine-bearing compound does NOT carry H334 (respiratory sensitizer) classification despite the amine chemistry — a critical distinction from isocyanate-crosslinked coatings where H334 is the primary inhalation hazard. Apply in ventilated conditions; use gloves as specified in SDS §8.