Use Pool Noodles To Insulate Pipes . If i were to use pool noodles as pipe insulation, i would only use them on hot water. Keep your boots from folding over by putting part of a pool noodle in them. 8 Cheap RV Hacks Using a Pool Noodle RV Toolbox from rvtoolbox.com Foam pipe insulation is usually used in crawl spaces or similar locations where there is some danger of freezing. Slit pool noodles and put them over your windshield wipers when parked to decrease sun damage or, in the case of arizona, actual melting. Getting the proper pipe insulation starts with measuring your pipes.