Characteristics Designed for avoiding punctures and being able to continue riding.
Puncture resistanceThe liquid contained in the inner tube seals small punctures (<3 mm).
WaterproofThe hole is sealed while you ride. Tried and tested!
Compatibility29" wheels and tyres with Presta valve (small valve).
CompositionMembrane : 100.0% Rubber - Isobutylene Isoprene Rubber (IIR) - Butyl
Storage adviceCarry your inner tubes in a container to protect them from getting punctured (tool drum, original packaging…).
Cleaning adviceTo get your wheel size, check the information on the tyre wall. Always carry a spare inner tube and a pump.
Product restrictionsEffective for sealing holes that are less than 3 mm in diameter.
Product catchline29" self-sealing inner tube with Presta valve. The preventive sealant inside the inner tube automatically repairs punctures (<3 mm).
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1 user recommend this product
Poor Valve make product useless03/04/2016Self healing if it would pump upPoor valve, video shows wrong valve for this produResponse of the brandHi Stuart,
Sorry to hear about the issue you have come across with getting the self healing tube to inflate properly. Having used both the 27.5 & 29 version in store I haven't come across this issue which leads me to think there must be a fault with the 2 (batch) that you bought. I would suggest to take the tube & wheel into your local store to see if they have the same issue when trying to inflate over 40psi. If so I'd get them to exchange the tubes for you and fit them to make sure the same problem doesn't occur.
Rob Basnett b'Twin Product Expert DECATHLONstuart was satisfied with this answer