Slime review£5.99

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

BikeRadar score3/5Find prices on Bicycle Blue Book

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.

Guy Kesteven

Freelance Writer, UK
Guy started filling his brain with cycle stats and steaming up bike shop windows back in 1980. He worked the other side of those windows from '89 while getting a degree in “describing broken things covered in mud" (archaeology). Dug historical holes in the ground through the early '90s, then became a pro bike tester in '97. Guy has ridden thousands of bikes and even more components the world over since then and can remember them all in vivid, haunting detail. Can't remember where the car keys are, though.
  • Age: 45
  • Height: 180cm / 5' 11"
  • Weight: 68kg / 150lb
  • Waist: 76cm / 30in
  • Chest: 91cm / 36in
  • Discipline: Strict sadomasochist
  • Preferred Terrain: Technical off-piste singletrack and twisted back roads. Up, down, along — so long as it's faster than the last time he did it he's happy.
  • Current Bikes: An ever changing herd of test machines from Tri bikes to fat bikes and everything in between.
  • Dream Bike: His Nicolai Helius AM custom tandem
  • Beer of Choice: Theakston's Old Peculier (not Peculiar)
  • Location: Yorkshire, UK

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