Yes, it is entirely possible to incorporate straight tape-in extensions with natural 4C leave-out without the use of constant high temperatures. In order to successfully achieve such result, it is crucial to use proper low-manipulation styling practices along with correct ways to blend the two hair types together.
The easiest and probably most effective way of blending your hair is by stretching rather than straightening your leave-out. Banding, African threading, twist-outs, and braid-outs may be used to elongate your natural hair and minimize shrinkage. Thus, your hair will look looser and more similar to straight tape-ins without the need for daily usage of flat irons. A simple blow-dry with cool or low temperature one time per wash day will suffice for a smooth effect.
Another way to make both your leave-out and extensions look alike is by styling the extensions accordingly. For example, rather than using your tape-ins straight, it would be better to give your tape-ins a bend, loose curls, or waves – it would be much easier compared to daily styling of natural 4C hair.
In conclusion, if done properly, you should have no problems making your straight tape-ins blend perfectly well with your loose 4C leave-out.
The easiest and probably most effective way of blending your hair is by stretching rather than straightening your leave-out. Banding, African threading, twist-outs, and braid-outs may be used to elongate your natural hair and minimize shrinkage. Thus, your hair will look looser and more similar to straight tape-ins without the need for daily usage of flat irons. A simple blow-dry with cool or low temperature one time per wash day will suffice for a smooth effect.
Another way to make both your leave-out and extensions look alike is by styling the extensions accordingly. For example, rather than using your tape-ins straight, it would be better to give your tape-ins a bend, loose curls, or waves – it would be much easier compared to daily styling of natural 4C hair.
In conclusion, if done properly, you should have no problems making your straight tape-ins blend perfectly well with your loose 4C leave-out.