Question 1

Is this really 16 separate tubes of caulk?**

Accepted Answer

This is a common point of clarification! This listing is for one bulk case containing 10.1 fluid ounces of silicone. The "16-Pack" and total ounce (161.6oz) description refers to the manufacturer's packaging and total volume, not 16 individual, full-sized cartridges. It's designed as a cost-effective supply for larger projects.

Question 2

I'm sealing my RV/bathroom/aquarium. Will this adhere properly to my surface?**

Accepted Answer

This 100% silicone adhesive sealant bonds well to most common materials like glass, metal, tile, and wood. For best results, especially on plastics or painted surfaces, ensure the area is **completely clean, dry, and free of old sealant or wax**. Some users in RV forums recommend a light sanding for painted trim. For aquariums, it is inert and safe once fully cured, but always allow a full 7-day cure and water-test before adding livestock.

Question 3

How does this compare to hardware store brands like GE or DAP?**

Accepted Answer

Based on user feedback from various DIY communities, XFasten offers comparable waterproofing and flexibility once cured, at a lower cost-per-ounce for bulk buyers. The main trade-off noted by some is that premium brands may have more consistent cartridge quality and slightly easier tooling. For large, non-critical sealing jobs, this provides excellent value. For critical structural seals, some professionals prefer the proven track record of top brands.

Question 4

I've seen comments about tubes being dry or clogged. Is quality an issue?**

Accepted Answer

While the vast majority of cartridges arrive in perfect condition, as with any bulk manufacturing, there is a small chance of a defective unit. The most common issue reported is a cartridge that may have begun to cure in the nozzle. We recommend inspecting each cartridge upon receipt. Our customer service team is committed to resolving any such issues promptly. Storing the cartridges in a cool, dry place will ensure their longevity.

Question 5

Is this a good choice for a beginner with just one or two small projects?**

Accepted Answer

Honestly, it might be more product than you need. This bulk pack is ideal for professionals, seasoned DIYers, or those with several large projects. If you only have a few small gaps to seal, a single 10.1oz cartridge from a local hardware store is often more practical and cost-effective. This product's value shines when you can use the entire case over time.

XFasten Black Silicone Caulk 10.1oz (16-Pack 161.6oz Total) Odorless 100% Silicone Black Caulking Waterproof for RV Sealant and Caulking RTV, Marine Aquarium and High Temp Silicone Outdoor Indoor Use

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