Number 1 Cockroach Killer Gel 60g - Pest Tech Gel - Proven to Kill All Species of Cockroaches and 6 Times Stronger and Bigger Than Maxforce!! 6 X Full Strength More Than Any Other Product This product is non-hazardous and proven to kill all species of cockroaches Last up to six months and still active The best cockroach control product. 24 hours instant result.