"Just did a 7 m x 20 m corrugated roof (all the joints and fixing points) with 24 tubes of this stuff. Applies really well, stays flexible. Fills gaps up to 10mm. So here's hoping it holds up well, and doesn't dry up, or peel away.. Cleans off with white spirit. So far so good."
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Review 2 for No Nonsense Roof & Gutter Sealant Black 310ml Pack of 12
"This stuff doesn't fully set so don't buy it to seal joints in woodwork in a trailer like I did. I also used it for open joints below damp course level in brickwork prior to painting with bitumen - so no set doesn't matter. It helps if you submerge the tube in hot water for 5 minutes to aid it's departure from the nozzle."