Thompsons emergency roof repair mastic has been developed from technology used on north sea oil rigs thompsons emergency roof repair mastic is a trowel applied mastic with the ability to adhere to virtually any roofing material even underwater with added fibres and a high solids content thompsons emergency roof repair mastic has been developed for filling plugging and repairing cracks and splits targeting leaks at the source of the problem thompsons emergency roof repair mastic is an all weather