Sennelier pure Mastic varnish 75ml Varnish for paintings made with 33% natural chios resin diluted in distilled turpentine. It provides a very resistant, high-gloss, high-thickness transparent film to oil painting paintings. It has a tendency to discolor slightly over time and turn yellowish. Easily reversible. Apply only to completely dry paint (minimum 6 months). It can be diluted with rectified turpentine only. Contains 75 ml. Brand: Sennelier.