To treat a concrete slab, you will come 2-3 inches off the wall and drill holes 10-12 inches apart using an 18in-24in drill bit. Using a 5 gallon bucket, mix 4 gallons of mixed solution (.8 fl oz of Termidor SC per gallon of water) and pour the 4 gallons of mixed solution in the drilled holes for 10 linear feet. Usually each hole will take approx 1/2 gallon of solution. It is easier to use a funnel to pour the solution into the holes. If there is a crawl space at any point, dig a 6x6 inch deep trench around any post or cinder blocks in the crawlspace and pour the Termidor SC mixture into that soil.
Termidor SC is really designed to be used outdoors. Boracare would be best. The interior wood pieces that are exposed will have to be stripped prior to the application if they are painted or stained. The manufacturer has told us that Boracare is not corrosive and it should not harm the interior of the fiberglass that touches the wood. For more information you may want to contact Nisus directly by calling 800-264-0870