Number 1 Cockroach Killer Gel 10g - Pest Tech Gel Bait - Kills All Species of Cockroaches and 6 Times Stronger Than Maxforce. Highly Recommended. (Do It Yourself and Save Money) 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.