Febond Blue GritProduct Information Blue Grit is a highly effective bonding agent designed to enhance the adhesion of plaster to smooth or non porous surfaces. It is a blue colored liquid that, when applied to walls or ceilings, creates a textured surface that helps plaster, render, or other finishing materials bond securely. Ideal for use on surfaces like glazed tiles, painted walls, and plasterboard, Blue Grit improves the grip of plaster, ensuring a long lasting