Cross-Ply Patch BN18 (8ply) 500 mm - 2-11-499
- Patch for tire repairs. 50cm. 8ply. For agricultural vehicles. Bias ply.
Bias Tire Patch EURO BN20 500 mm (8-Ply) – Xtra Seal
Diagonal tire repair insert | Type BN20, 8-ply cord | Brand: Xtra Seal | Sold as: 1 pc.
The EURO bias tire patch BN20 500 mm from Xtra Seal is an 8-ply repair insert built exclusively for bias-ply tires — both tube-type and tubeless. Sharing the same cord count as the BN15, the BN20 offers a notably wider coverage area (500 mm versus 380 mm), covering half a meter of inner liner surface to handle the most extensive damage areas found in the largest industrial bias-ply tires — mining equipment, large earthmoving machinery, and the heaviest-capacity construction machines. Like the rest of the BN line, it can also serve as a valve housing for truck and agricultural inner tubes. The slit mylar backing is peeled off right before mounting. It works with cold and hot vulcanization.
Product Overview – Bias Tire Patch EURO BN20 500 mm 11-499
The patch consists of black rubber over a blue tie gum, which creates a durable bond with the inner liner surface once cured. Eight layers of crosswise bias cord provide the resistance needed for tires with extremely thick, multi-ply casings operating under the highest service loads. Thin, even edges lower the risk of the patch lifting at the edges.
Like the other patches in the BN line, the BN20 can serve as a valve housing for truck and agricultural inner tubes — useful when the original valve housing is damaged. The slit mylar backing is peeled off right before the patch is applied to the prepared, cement-coated inner surface.
Features and Specifications
Eight layers of crosswise cord — same structural strength as BN15, wider coverage area.
Notably wider than the BN15 (380 mm) — for extensive damage in the largest industrial tires.
Works with both tube-type and tubeless bias tires.
Creates a durable, sealed bond between the patch and the tire inner surface.
Protects the patch base from contamination and peels off easily right before mounting.
Can also serve as a tube valve housing for truck and agricultural inner tubes.
Technical Specifications
| Parameter | Value |
|---|---|
| Part number | 11-499 |
| Brand | Xtra Seal USA |
| Product type | Bias EURO tire patch |
| Designation | BN20 |
| Diameter | 500 mm |
| Cord layers | 8 (bias/diagonal) |
| Material | Black rubber over blue tie gum |
| Protective layer | Slit mylar |
| Primary use | Bias-ply tire repair (tube-type and tubeless) |
| Secondary use | Tube valve housing for truck and agricultural tubes |
| Cure methods | Cold, hot |
| Sold as | 1 piece |
Applications
Where This Patch Is Used
- Repair of extensive damage in bias-ply mining equipment tires
- Repair of bias-ply tires on large earthmoving and construction machinery
- Repairs where the damage area exceeds the coverage of the BN15
- Tube valve housing for truck or agricultural inner tubes
- Professional tire repair shops specialising in industrial tire retreading
Frequently Asked Questions
How does the BN20 differ from the BN15?
The BN15 (11-498) has a 380 mm diameter and eight cord layers; the BN20 (11-499) has 500 mm and the same eight cord layers. The structural strength of the cord is identical — the only difference is diameter. The BN20 is chosen when the damage area exceeds what the BN15 can cover with the required reinforcement margin.
Can BN20 bias patches be used on radial tires?
No — the bias cord insert is built for bias-ply tires only. The crosswise cord arrangement matches the structure of a bias tire; using this patch in a radial tire goes against repair technology guidelines. For radial tires, radial-cord repair inserts should be used.
Which cements work with the 11-499 patch?
The manufacturer recommends Xtra Seal Standard cement (14-008) or Super-Blu (14-511) for cold-cure vulcanization. After mounting, sealing the patch edges and buffed surface with Sealiner is recommended.