I like this, but it looks like it’s available only in the US. I’m going to Canada shortly so will try and find, unless anyone knows a UK supplier
I've ridden half way round the world and never needed blu-tak. Every day's a school day though, so I'm keen to understand what you use it for...
Sugru is a better option than Blu Tac, moldable but then cures to a silicon rubber like consistency. I’ve used to repair a leaking coolant hose, mend a leaking boot and fix bits of fairing. https://www.tesa.com/en-gb/consumer/repairing-tapes/sugru
@ymfb the link below suggests the WD-40 Precision Pens should be available in Canada: https://wd40.ca/product/wd-40-precision-pen . Ebay show items available from the USA, but the delivery costs may inflate the price. Unfortunately, Amazon UK say the item is currently unavailable in UK: https://www.amazon.co.uk/WD-40-Precision-General-Multi-Purpose-Lubricants/dp/B0CJSYB4T9 . As an alternative the 100ml "Pocket-size" can is available from Screwfix I believe. Hope it helps. Tom.