How does the porosity of stone affect the adhesion of cushions or upholstery?

The porosity of stone plays a critical role in determining how well cushions or upholstery adhere to its surface. Highly porous stones, such as sandstone or limestone, absorb adhesives more readily, which can weaken the bond over time as the adhesive penetrates deeper into the material. Conversely, less porous stones like granite or marble provide a smoother surface, allowing adhesives to form a stronger, more durable bond.

For optimal adhesion, it’s essential to choose the right adhesive based on the stone’s porosity. For porous stones, epoxy or polyurethane-based adhesives are recommended, as they fill gaps and create a robust bond. Non-porous stones work well with acrylic or silicone adhesives, which adhere effectively to smooth surfaces.

Additionally, surface preparation is key. Cleaning the stone to remove dust, oils, or residues ensures better adhesion. For highly porous stones, applying a sealant before adhesive can prevent excessive absorption and improve bonding strength. Understanding these factors helps in achieving long-lasting and secure cushion or upholstery attachment to stone surfaces.