The complete guide
Matching the right seal to your gutter profile — FloPlast 114mm Square Gutter Seal, Bag of 10
Guttering parts are not universal across brands or profiles — a 114mm square fitting only seats correctly on the matching system. Before ordering, measure the existing gutter's internal width and check whether it's half round, square line or a deep-flow profile, since the FloPlast 114mm Square Gutter Seal, Bag of 10 is manufactured to the 114mm square standard and won't bridge a mismatched size.