Patching a tyre, or "remendo de pneu" in Brazil, is the internal repair of a puncture using a patch and/or plug to seal the hole and restore the tyre's airtightness, allowing it to be reused. It's a common and cost-effective solution for small punctures in the tread area, but not all damages can or should be repaired. The correct method is crucial for safety. The most recommended and current techniques in Brazilian workshops are cold vulcanisation (patch) and the mushroom plug, which do not use high heat that can degrade the tyre's structure. A repair that follows the manufacturer's and INMETRO's guidelines, for punctures up to 6mm in the central tread area, is considered safe. The total cost of a proper repair in a specialised shop, including disassembly, repair, balancing, and labour, typically ranges from R$ 80 to R$ 150. Considering that a new tyre for a popular car like a Hyundai HB20 can cost from R$ 300 to R$ 500, a correct repair represents a significant saving, reducing the cost per kilometre driven. However, repairs on the sidewall or shoulder of the tyre are not safe and are not approved by vehicle manufacturers or Latin NCAP, as these areas are subject to high flexing and stress. ANFAVEA reinforces that tyre maintenance is a key safety item, and a repair, when well done, extends the product's useful life sustainably. The key is always to have the repair evaluated and performed by a qualified professional.
Principais métodos e aplicabilidade no mercado brasileiro:
| Método | Melhor Para | Durabilidade | Custo Relativo |
|---|
| Remendo a Frio (Cold Patch) | Furos pequenos e médios (até 6mm) no centro da banda de rodagem. | Alta, se bem executado. | Médio (R$ 80 - R$ 120) |
| Plug Cogumelo (Mushroom Plug) | Furos de até 5mm, oferecendo vedação interna e externa. | Muito Alta. | Alto (R$ 100 - R$ 150) |
| Cinta (String/Plug) | Solução de emergência temporária, para chegar a um oficina. | Baixa/ Temporária. | Baixo (Kit: R$ 20 - R$ 50) |
- Custo-benefício para o proprietário: Um remendo profissional pode custar cerca de 25% do preço de um pneu novo.
- Segurança comprovada: Métodos a frio preservam a integridade da estrutura do pneu.
- Limitação crucial: Danos nos flancos (laterais) do pneu invalidam qualquer reparo seguro.
