Seam Sealing Tape WBM FX-420 – Hot Melt - Waterproof PVC Coated Fabrics – Repair Tape - 20 Metres - Iron On (Clear (Transparent), 20mm Width)

Never used before. Used to make water proof coat with ripstop nylon. Used silicon paper between tape and my iron. Keep seams narrow or over lap a second strip of tape.Not really tried the coat yetI did enclosed french seams

does the job but not easy to use

I’ve bought this for when I sew a rain coat but have used it to repair a small tear in a gazebo. It was easy to use following the instructions and has worked perfectly.

The tejp does a really good job of keeping water out, the trick is to get it to stick properly so it does require patience and time in the application stage.After applying the tejp on seams on a jacket I have used it in heavy rain and the jacket stayed almost completely dry. I would say the places where it dit leak a bit was where I have missed in the application of the tejp rather than it not working properly. But as the tejp is hidden between lining I can't check this.The right ironing (/ melting) temperature can be a bit tricky to find so I recomend experimenting on a seam from scrap frabric first. If you get the iron a bit to hot for the tejp will kind of "over melt" and not stick to the fabric but to the pressing cloth. If it doesn't get hot enough it will not melt enough and hence not stick to the fabric at all.As you need to use a pressing cloth it is also much harder to use on curved seams, like you would have on a figure shaped jacket for women. This as you can't see that the tejp follows the seam propperly.