Driven to succeed & 100% Guaranteed, Monster Seal Tyre Sealant is a proven, trusted & tested product to provide the ultimate protection against flat tyres & under inflation. It can be used in both tubed & tubeless tyres, lasting for the lifetime of the tyre. It will not corrode or harm your wheel or tyre. Monster Seal will seal quickly & effectively holes up to 6mm (1/4) in diameter in the tread area of tubeless tyres.