To clean up the residue I used my "boat chisel". My boat chisel has been sharpened to minimize scratching the surface. If you're not skilled in the use of a chisel or dulling or sharpening them the right amount, find another way of removing the vast amount of sealant or you could scratch your hull.


Once I had the majority of the surface clean I used Paint Thinner (it works well on butyl) and then Acetone, with chemical resistant gloves on, to do a final cleaning.