Felt roof adhesive recommendation

thegrincher2024

A small section of the felt of my extension flat roof has lifted enough to squeeze fingers underneath. 

Any recommendations for an waterproof adhesive I can apply to bond it back down?

Thanks

MysteryMe

Depending on where it has lifted, something like this? 

https://www.screwfix.com/p/gorilla-glue-cloth-tape-48-mesh-black-11m-x-48mm/87114?tc=JA4&gad_source=1&gclid=CjwKCAjwuMC2BhA7EiwAmJKRrJBfgYIgZQXKdfmaa39Wmb6kmjQrntatRuqutep-eEyJxWliemxH1BoCzTYQAvD_BwE&gclsrc=aw.ds

Bookworm105

entirely depends on how big an area is lifting and what is going to keep on lifting it (wind, rain etc). A photo would help understand 

taping over it will be a short term bodge as no self adhesive tape has longevity of adhesion to a rough surface such as felt

brushing or squirting felt adhesive under the felt may, or may not, result in a watertight seal and a full bond to stop the felt being lifted again.  Comes down to how well you do the job and will the felt resume lying flat or has it now acquired a "curl" that prevents that unless it is weighted down whilst setting.