I have been researching the Effetto Mariposa Caffelatex sealant a bit more. Certainly the replies from
@confusedcyclist and
@Sea of vapours have been helpful in this respect as both have found it performs well.
Malcolm from the cycle clinic says that after testing various brands Caffelatex seems to work very well. i know that he sells the stuff but he sells others sealants as well. I know he is high mileage so should get lots of opportunity to test.
Caffelatex themselves say that it will seal 3mm in road tyres and 5mm in MTB tyres. That doesn't seem all that impressive compared to what some others claim but could just be more honest! The only testing I can find online relates to MTB tests and one test found that at 30psi it would seal a 6mm puncture but not an 8mm puncture which is actually consistent with what Caffelatex themselves claim. However another test said it sealed a 2.75mm puncture but not 6mm again on MTB - which I suppose is again (just about) is in line with the claims Caffelatex make.
The test that said it would seal a 6mm puncture but not 8mm actually rated it second behind Stans Race Sealant for effectiveness.
So assuming it will seal a 3mm puncture in a road tyre I guess that it will be sufficient to cover most punctures made by thorns which is what I normally get and what
@Sea of vapours has found as well.
It appears to be thinner and less likely to clog up valves than say Orange, and certainly less than Stans Race Sealant.
My reading on the subject, what little I can find, suggests that for road use Orange is a good choice and I would also consider Effetto Mariposa Caffelatex mainly based on experience of people on here and the cycle clinic recommendation.
Could really do with some road tyre specific tests of the various sealant options.