i need to patch convertable top duck tape keeps pealing off any suggestions

Hello.
The easiest way I have found to patch a convertible top is to glue some vinyl to the inside so the cloth lining of the vinyl patch is glued to the cloth lining of the convertible top. Then spread silicone sealant over the hole and the edges of the vinyl surrounding the hole for about 1/4". It isn't pretty, but it will keep the water out.
Ron