This polymer stiffens natural fibres and fabrics such as cotton, linen or silk; it is useful for stiffening unprimed canvas or sculpting and shaping fabric. Transform the surface you work on and explore new unique techniques. Fibres saturated with GAC 400 will dry to a hard, stiff film. Rabbit skin glue alternative Archival Contains the minimum amount of thickeners, levellers, defoamers and surfactants to ensure good film formation.