Polar Felt Seal - Waterproof Felt Sealant for Shed Roofs & Garage Roofs - One-Coat Repair - Prevent and Stop Leaks & Cracks - No Primer Needed - Clear - 500ml

Easy to apply and effective. I treated a small felt roof on a garden cupboard but you would probably need two cans to treat a decent-sized garden shed.

Installed easy & work well, also dries quickly

Easy to apply, dried quickly and sealed shed roof nicely. Not bad for the price.

I had developed a leak along the join in my shed roof where the clout nails hold the edge at the overlap. Rather than redoing the whole roof again as it had only been done six months prior I decided to try a sealer. It has been applied now for about six months and we have had some pretty horrendous wind and rain during this time but there is absolutely no sign of any leakage in the area of the joint anymore. Simple to apply with just a brush straight into the felt and job done. Definitely does what it says on the tin. First class product imo.

Easy to use

Quality felt seal , sticks and seals brilliantly

Seems to be effective, however a longer period of time required to see its true effectiveness.

good