I built a workshed out back. Running out of windowglass putty, I used some GE clear caulk to seal windowpanes. Today, after 22 years of exposure to snow, rain, and strong Rocky Mountain direct sunshine, the seal is as rubbery, flexible, and secure as ever. I've no doubt the material will go to 25 years, and more.

Getting mold to grow on the densely arrayed molecular structure of silicon rubber, is like trying to grow mushrooms on a windowpane. Natural fact: > that is just not going to happen.... even in the most steamy of tropical climates.

Alchohol is best for cleaning tub surround areas prior to caulking... to evaporate out residual water moisture, and to remove soap. residues. Utilizing petro-chemical hydrocarbon -based solvents instead would leave behind a very thin film of oil that may compromise silicon adhesion.

Do yall know about the teaspoon trick? Lay down about one meter of caulk bead at a time. Then repeatedly dipping the teaspoon into a glass of water, draw the spoon along the bead, pushing the material into the cavities, getting a smooth seamless fillet. For a larger radius fillet, employ a tablespoon. Remember to dip the spoon frequently to keep caulk from loading on to it. In the event, a rag serves to wipe excess from the spoon .

To seal existing latex caulk and make it stand up better, first clean and dry it, then paint it with a matching color of acrylic enamel bathroom paint. Use paralell lines of masking tape to get a nice straight clean appearing edge.