Lead-Wire Patch/Plug Unit 55 mm/8 mm (1 pc) - 3-13-673
- Patch with plug. For tire repairs. Lead-wire.
Mushroom Repair Plugs Xtra Seal – 8 mm / 55 mm
Tire repair plugs | Mushroom type | Brand: Xtra Seal | Sold as: 1 pc.
Xtra Seal mushroom repair plugs 8mm/55mm are a notably larger format than the previous variants in this line — the stem is 3 mm wider than the 5 mm variant, and the cap is 13 mm wider than the 42 mm variant. The ∅8 mm stem is sized for large puncture channels left by rods, thick bolts, installation anchors, or sharp industrial debris, where narrower stems wouldn't make proper contact with the channel walls. The ∅55 mm cap provides an adequate sealing margin for truck, agricultural, and industrial tires with a thicker tread structure. For cold vulcanization only.
Product Overview – Mushroom Repair Plugs 3-13-673
The plug is made from black rubber coated with an active tie gum layer on the stem and the underside of the cap. Once the cement is applied and the plug is seated, the active gum bonds with the vulcanizing cement, creating a durable seal both inside the puncture channel and between the cap and the tire inner liner.
The 8mm/55mm format is particularly useful in workshops servicing truck fleets, agricultural machinery, and construction equipment, where large-diameter punctures from industrial debris are a common repair scenario. After installation, the excess stem is trimmed flush with the tread face.
Features and Specifications
Single-piece repair: stem seals the channel, cap secures the inner liner in one step.
For wide puncture channels from rods, thick bolts, and industrial debris.
Wide inner liner sealing margin for truck, agricultural, and industrial tire repairs.
Suitable for both tire constructions, tube-type and tubeless.
Covers stem and cap underside — bonds with cement for a durable seal.
Mounted with Xtra Seal vulcanizing cement — no press or heat required.
Technical Specifications
| Parameter | Value |
|---|---|
| Part number | 3-13-673 |
| Brand | Xtra Seal USA |
| Product type | Mushroom repair plug |
| Stem diameter | 8 mm |
| Cap diameter | 55 mm |
| Application | Radial and diagonal tires (tube-type and tubeless) |
| Cure method | Cold (chemical vulcanization) |
| Sold as | 1 piece |
Applications
Where These Plugs Are Used
- Repair of wide-channel punctures from rods, bolts, and anchors in truck tires
- Repair of agricultural machine tires damaged by large debris in the field
- Repair of construction and industrial equipment tires
- Workshops servicing truck fleets and heavy machinery
- Repairs requiring a plug with a stem wider than 5 mm
Frequently Asked Questions
How does this plug differ from the 5mm/42mm variant (3-13-672)?
The 3-13-673 has a 3 mm wider stem (8 mm instead of 5 mm) and a 13 mm wider cap (55 mm instead of 42 mm). The ∅8 mm stem is designed for puncture channels from items significantly thicker than typical nails or screws — rods, bolts, or installation anchors — where a 5 mm stem would leave too large a gap against the channel walls to form a proper seal.
Is the 8mm/55mm plug suitable for passenger car tires?
Yes — the 8mm/55mm mushroom plug works on any tire type where the puncture channel doesn't exceed 8 mm. The ∅8 mm stem sets the upper limit for effective sealing with this format — for damage with a wider channel, a different repair method should be used.
Which cements work with the 3-13-673 plugs?
The manufacturer recommends Xtra Seal Standard cement (14-008) or Super-Blu (14-511). Apply cement to the plug stem and to the inner liner surface around the puncture channel, let it dry, then proceed with installation.