Can acidic silicone sealants be used on sintered stone?

Can acidic silicone sealants be used on sintered stone?

Acidic silicone sealants are not recommended for indoor sintered stone sealing. The main reason is that their acidic components may corrode and stain the sintered stone and surrounding metal fittings. Furthermore, their odor and application scenarios are not compatible with indoor stone sealing requirements. The specific risks are as follows:
1. Risk of Corrosion and Contamination of Sintered Stone

Acidic silicone sealants release acetic acid (acetic acid) during the curing process. This acidic substance is highly permeable and corrosive.

If the sintered stone is porous (such as some granite and marble), the acidic components can penetrate into the stone, causing permanent stains such as a whitening or loss of gloss, damaging the surface appearance and texture.

Even with dense sintered stone, the acidic components can chemically react with minerals (such as calcium carbonate) within the stone. Long-term contact can weaken the surface structure and affect durability. 2. Corrosion of Surrounding Metal Fittings
Indoor sintered stone installations often involve metal fittings (such as stainless steel trim, metal brackets, and hardware fixtures). The acetic acid released by acidic silicone sealant can directly corrode the metal:

This can cause rust and oxide layer loss on the metal surface, not only affecting the metal fitting’s aesthetics but also compromising its structural stability (e.g., loosening trim and rusting and deformation of brackets), posing a safety hazard.