Product Description. 1  Flex Seal as seen on TV is a rubberized leak sealer that seeps into cracks and holes to seal out air and moisture. When dry, Flex Seal, as seen on TV, is a long-lasting, watertight, paintable, flexible rubber coating that won't sag, drip, crack or peel. It seals out water and lasts for years.
The average high in Antigua is 31ÂºC in September so itâs perfect if you love the heat. Temperatures only drop to 25ÂºC at night so you wonât need to bring many warm clothes. The sea temperatureâs 29ÂºC, so itâs lovely for swimming, while humidityâs very high.
Here are some annual weather facts we collected from our historical weather data: 1  A lot of rain (rainy season) falls in the months: May, June, July, August, September and October. 2  Antigua Guatemala has dry periods in January, February, March, April, November and December. 3  On average, the warmest month is May.