Seam Sealer, worthy of the name

Have made it with the help of this seam poet to get an old cheap-beach tent from Lidl again tightly that I use when camping as a kitchen tent. Even seams whose holes were already extended under train left, be sealed. However, it takes a while until the work is done when plotting the means of internal and external.
At the next downpour everything stayed dry - before treatment the water inside had formed puddles!