

🔥 Seal the gap, save your space — safety that speaks volumes!
The Hilti FS-ONE MAX 10.1oz is a premium intumescent firestop sealant designed for sealing penetrations in concrete, masonry, drywall, and metal surfaces. With a low VOC content and ethylene glycol-free formula, it offers eco-conscious fire protection that expands under heat to block flames and smoke. Suitable for a broad temperature range (2-40°C), this water-resistant caulk is a trusted solution for professionals seeking reliable, code-compliant fire barriers.
| ASIN | B08Y98KN77 |
| Best Sellers Rank | #79,781 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #5 in Fire Barrier Caulk |
| Brand | HILTI |
| Color | Red |
| Date First Available | September 14, 2021 |
| Item Form | Foam |
| Item Weight | 10.1 ounces |
| Liquid Volume | 10.1 Fluid Ounces |
| Manufacturer | Hilti |
| Material | Concrete, Masonry, Drywall |
| Number of Items | 1 |
| Surface Recommendation | Hard Floor |
| Water Resistance Level | Water Resistant |
P**C
Expensive Caulk but needed per specifications
Price was too high for the product, but required for spec's
M**H
Works
I used this to install 1/8th inch screening over my 1/4 inch crawlspace vents. This is recommended to keep embers from wildfire from getting into your crawlspace and setting your house on fire.
K**R
Hard to Apply
This stuff is really thick and not easy to spread. We went through a ton of gloves finishing our project. We needed it for our firewall to pass inspection and it did do the job.
Trustpilot
2 months ago
4 days ago