Wonderful stuff, eliminates the need for messy tubular glue.About the same as the Tufo tubular glue tape, at a better price, as the box does 2 tires not just 1 = Great Value !It held all year, through hundreds of rides & some 10 races. In fact, tire wore out first.Just a small learning curve to use. Be sure to use a hair dryer to remove old tire & most / all of the glue tape when it’s time to remove the old tire.If you use enough heat, the tire & glue tape should all come off. If not, just heat & peel off tape / glue residue from rimUpon application, you remove the first protective anti-stick layer, and with the rim in the forks of bike upside down, or having a friend hold by axle, slowly rotate & apply sticky sided of tape, pushing down in center to contact. It’s the width of most typical rims (19mm I think), so it will fit neatly into tire ‘trough’.Once applied to rim, the outer anti-stick layer is still on outside of tape, then with say 20 psi in tubular tire, slip it over the tape & position it perfectly centerered. Be sure to leave about 1″ of so of anti-stick layer off either side next to valve stem so that it can be pulled out later.(Btw: For ease of installation, it’s imperative that you ‘pre-stretched’ tubular tire by leaving overnight on ‘dry’ rim (even a clincher rim is ok) with up to 100 psi in tire, this prepares the tire to fit neatly over rim for actual glue tape install.)With tire visually centered, grab that 1″ of anti-stick film & gently pull from between now mounted tire & rim. Glue won’t ‘hard set’ until you put ‘riding pressure’ on tire & rim, so minor re-positioning of tube / rim alignment is possible if required.Spin rim / tire assembly & view from both angles to make sure it’s well mounted & straight.Then fill to 100psi & gently test ride. The pressure from your weight will help “set” the glue tape.Once ridden for a few hundred yards on hot pavement, it will be firmly set & unable to be removed absent heat & lots of side pressure.(Your thumbs will get a workout when removal time comes, LOL)I used this on Carbon fiber 40mm road wheels to apply both training & racing tubulars.I had prior avoided tubulars due to the mess of traditional glue or the $$$ of having the shop glue them & waiting.Then my friend who was a ‘Clydesdale’ (210 # rider) and raced crits in Dallas all summer told me about the tape method & how it held his weight even in the hot summer crits.We used it & found the method of application simple & the results to be strong & reliable.Hope this helps any who are considering this tubular taping method.