Weber One-coat Weberpral M Monocouche Stucco Render review. Roger gets stuck into Weber's one-coat, through-coloured, water-resistant Weberpral monocouche render and find that it's not quite as difficult as they expected. Find out more at: https://www.uk.weber/renders weberpral M is a one-coat, ready-mixed, cementitious, weather resistant, external decorative, through-coloured render, suitable for most types of brick or blockwork. Factory produced from carefully selected raw materials for consis