these are regular glue sticks and are not affected by uv or colored lights.great for cocooned victims and general cobweb effects. Black widow glue sticks are made by one of the leading glue stick manufacturers in the united states. All of our glue sticks are non-toxic and have fda food packaging approval #21cfr175.105. The material safety data sheets for our glues state that they are not considered flammable or combustible which makes them safe for use in commercial haunted houses.if there was a safer, more durable glue available for our cob webbers, we would be selling it.