The first thing we tried to use. it does not work. We use sealant every day. If you use different types and colors, you usually don't use a full tube every day. We saw the red caps, 4 per set, and thought they would work better than just using a piece of tape to seal the tip on the tube. Well, the caps are too small to fit any standard size gasket tube we buy or use. Useless. Other tools? So far we haven't figured out where any of them work well in every situation. A finger or a plastic spoon works best for us. Or just a spatula.
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