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| Manufacturer | Backer Rod Manufacturing |
| Description | ULTRA BLOCK is a pre-engineered, patented, flexible textile fiberglass roll material with a fiberglass matt facing, containing approximately 30% by weight unexpanded vermiculite that is used as part of mechanical expansion and construction joint fire stopping systems. Ultra Block is a non-stocking item sold on a job-by-job basis. Please enquire regarding your specific needs. |
| Unit | bag |
| Size | Multiple - enquire |
| Color | yellow |
| Category | Backer Rod, Firestop, Firestop Materials |
| Item Number | IEDA |