ST2750 in Adhesive and Render

ST2750 is a hard VAE powder with a minimum film forming temperature of 3 °C, used where a plant makes tile adhesive and cement-lime render on the same site.

Adhesion in Adhesive

In a tile adhesive the powder secures the bond at the interface and supports the ribs. Hardness helps both, because a stiff mortar holds its notch and resists slip.

Dosage usually sits at 1 to 2.5 percent, lower than a flexible ETICS adhesive because the substrate is stable and the tile is not exposed to impact.

Adhesion in Render

In a cement-lime render the powder improves adhesion to masonry and reduces the dusting that lime-rich mixes can show at the surface.

Render dosage is often similar to adhesive dosage, which is what makes the dual use practical for a plant with one silo.

Balancing Both

The compromise appears in water demand and workability rather than in strength. A mix that trowels well as an adhesive may be slightly stiff as a render.

Adjust the ether and the filler rather than the binder when moving between products, and keep the binder constant across the two lines.