Hi i have got to repair sone joints on an aluminium box gutter was just wondering on the best product to repair the joints with out replacing them. So i am looking to go over the top of all existing leaky joints thanks
Assuming the aluminium gutters are bare, clean, dry, sound and prepared as detailed in the technical data sheet you could consider Rust-Oleum Mathys Fillcoat Fibres.
This can bridge cracks and gaps upto 2mm.
The size and the amount of movement in the joints would determine if this would be suitable.