Hello and welcome to E health forum.
As a advise , I would like to mention that, it is important to understand that there is no such thing as 100% safe sex, although the use of latex barriers such as condoms in conjunction with a spermicide can make sexual activity safer (in other words, reduce, not entirely eliminate the risk).
The only way to ensure that HIV is not transmitted sexually is either having relations with committed partners, non-promiscuous partners with known HIV negative status, or by not being sexually active (abstinence).