Question 1

Is this sealant truly 100% silicone, and can I paint over it?**

Accepted Answer

Yes, this is a pure 100% silicone rubber sealant. A key point highlighted by users is that, like most pure silicones, it is **not paintable**. If painting is essential for your project, a siliconized acrylic latex caulk would be a better alternative.

Question 2

What surfaces will this silicone adhere to properly?**

Accepted Answer

It bonds excellently to clean glass, metal, ceramic, and most wood and masonry. Based on user experiences, for best results on PVC, certain plastics, or old, weathered siding, a thorough cleaning and possibly a primer are recommended to ensure a long-lasting hold.

Question 3

How long does it take to fully cure, and is it flexible long-term?**

Accepted Answer

It skins over in about 30 minutes but can take 24 hours or more to cure completely, depending on humidity and depth. This is the most praised benefit: once cured, users consistently report outstanding long-term flexibility and resistance to cracking through seasonal temperature changes.

Question 4

I've seen comments about the nozzle clogging. Any application tips?**

Accepted Answer

To prevent the tip from skinning over, a common DIY hack mentioned on social media is to insert a nail or screw into the nozzle immediately after use before capping. For the cleanest bead, cut a smaller opening than you think you need—you can always cut more.

Question 5

Is this the right choice for a complete beginner doing a small exterior repair?**

Accepted Answer

While highly effective, its fast skin-over time and need for proper surface prep make it better suited for those with some DIY experience. For a first-time, small exterior job, ensure you're ready to work quickly and have the right tools for smoothing. The durability makes it worth the learning curve for permanent fixes.

DAP 100% Silicone Rubber Window, Door, and Siding Sealant, Black 9.8 Oz (7079808642)

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