Dr Boat Heavy Duty Repair Kit for Boat Kayak, Canoe, Tent, Inflatables, Swimming Pool, Hot Tub - LIQUID PATCH Resistant to Fresh and Salt Water UV-Resistant Long-lasting - 40ML. Heavy-Duty Formula: PVC is your boat, kayak, tent, or inflatable bed's identical material - Hot tub puncture repair kit gel is a liquid form of PVC, which is fully flexible and resistant to salt, chemical, or hot water.
eBay