I've been using this product since 1996 and have applied 1,000's of tubes, mostly on siding and the exteriors of homes that I have built new or repaired. This is one of the BEST products out there, period! After reading some of the reviews, it's utterly amazing what people expect of a calking when it's not used properly. This calking has to dry completely if you expect it to work, so it can't be used in cold weather or when rain is expected in the near future.... in those conditions, you will unfortunately have to use a messy sticky solvent based product, of which many do not perform as well long term. This product is one of the easiest calkings to use, tools easily and smooths out beautifully! I used this on my own home which I built in 1997 and the calking is still flexible and sealing perfectly! As with most latex calking, it should be painted because it will attract dust and look dirty in time. This calking also works very well indoors for sealing trim and molding, paints perfectly! I would never use this product in a shower, it's not meant for such use. To seal around a fiberglass shower where it meets the drywall, yes, but never inside. I've used about every brand and style of calking made. For it's intended use, it's the best easiest to use calking I have ever run across! I would recommend this calking to anyone. I've used a few others that work as well for some areas and are more expensive, but overall, this product is hard to beat!! One thing to note, the CLEAR version of this product does not perform the same and takes an extremely long time to dry.... I honestly would never use the clear. This calking should be painted anyway, so there is no need to ever use clear...... and the Alex Plus calking doesn't hold a candle to this product! Spend a buck or two more and buy the "good stuff"!