Slime review£5.99

Puncture protection, as long as you don't put a hole in the sidewall

BikeRadar score3/5

A green 'suspended fibre' glycolbased non-toxic product, that comes with a schraeder valve core remover. Lasts for up to two years between top-ups. It sealed bigger holes better than other glycol products.

The thickest of the sealants we've tested, it has the most pronounced unbalanced wheel effect. It doesn't claim to seal sidewall and beads (like Latex based sealants do) and it doesn't. It also recommended using the largest amount of product (120ml) per tyre.

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