Gorilla 100% Silicone Sealant (Clear, 10 oz) Review (2026)
By Nate Sawyer, Editor · Updated July 2026
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- Showers
- Tubs
- Sinks
- Waterproofing
A 100% silicone sealant built for the wettest bathroom joints - showers, tubs, and sinks. It is water-ready in about 30 minutes, carries lifetime mold and mildew resistance, and stays flexible without yellowing or cracking. Like all silicone it cannot be painted, so pick clear or a matching color, but for pure waterproofing it is a top choice.
Pros
- 100% silicone is fully waterproof and water-ready in about 30 minutes
- Lifetime mold and mildew resistance for constant-moisture shower and tub joints
- Will not yellow, shrink, or crack and stays flexible on moving joints
Cons
- Silicone cannot be painted, so match the color to the fixture up front
- Strong acetic (vinegar) odor while curing; ventilate the bathroom
- Uncured silicone is messy and hard to tool cleanly for beginners
Specifications
| Type | 100% silicone sealant |
|---|---|
| Water-ready | ~30 min |
| Full cure | ~24 hr |
| Mold resistance | Lifetime mold and mildew resistant |
| Standard | Meets ASTM C-920 Class 35 |
| Temp range | -40F to 350F service |
| Paintable | No (silicone) |
Frequently Asked Questions
- How soon can you shower after applying Gorilla 100% Silicone?
- It is water-ready in about 30 minutes, with full cure at roughly 24 hours. That fast water-ready time is the practical advantage over sealants that need a full day before the bathroom is usable.
- Can you paint over silicone sealant?
- No — 100% silicone cannot be painted, so you have to match the color to the fixture before you apply it. This is the single most common regret with silicone and it is not fixable after the fact.
- Will it mold in a shower?
- It carries lifetime mold and mildew resistance and meets ASTM C-920 Class 35, so it is built for constant-moisture tub and shower joints and stays flexible without yellowing, shrinking or cracking. Expect a strong vinegar odor while it cures — ventilate the room.