mr brown
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- 779
as the previous owner had glued my daughter's rooflight with sikaflex, when it started leaking , a lot , i found i couldn't remove it without breaking it. so i washed and dried off the existing mastic and covered it with this stuff, applied with a spatula , 6 months later , dry as a bone . if you feel you want to do it properly at a later stage , this stuff can be removed with white spirit. 145 Butyl Rubber Sealant - 310ml 145GY | Zoro UK