How long will my hair stay sraight with this relaxer?

[Erick]

i am a black guy.i had a thick Afro like young Michael Jackson then i put dark and lovely healthy gloss 5 super.and now its like katt Williams hair. and now i want it to stay that way. i usually put another one on my head after like two months but i got lazy the two past months and didn't take care of my hair so it got poofy straight i guess you can say but it didn't look good enough to wear out slick back. so im just wondering how long will my my hair stay straight like katt Williams.