Re: Wasp in Mast/Sail
We had the same problem with yellow jackets getting inside the outside wall of our house. The pest control person injected a white powder substance that really solved the problem. Yes, the liquid spray is really "hot" stuff" and may very well do damage, you might want to try a very small test spot. Some of the sprays we have used also have an oily base which is very hard to remove, probably not good for sails and halyards. I think the pest control people have access to materials that we can't get, maybe better to just hire one and have done with it?