According to ISTR Devotard a few months ago, there are anti-puncture tyre goops on the market which actually work. Can anyone recommend a good one and tell me where I'm likely to find it and how much it's likely to cost? No, it's not for the DR. I'm finally utterly pissed off with having to patch my wheelbarrow's tyre twice a day due to the eleventy billion little four pointed calthrop type seeds that have suddenly appeared in my garden and thought I might try some new technology. If anyone's got any advice as to how to stop the dog treading on them, I'd appreciate that too.