Although you may not whip or fuse a rope frequently, knowing this skill can be extremely helpful when you need to use it. A rope can only be fused when it is made of nylon, polyester, or polypropylene, natural fiber ropes cannot be fused. If you are cutting a rope made of nylon, polyester, or polypropylene, fusing it will help prevent the ends from fraying. Before you cut the rope, tape around the area you will be cutting and then cut the rope in the middle of the tape. Hold the cut ends of the rope over a match or candle flame to melt the ends and prevent them from fraying. If you are not cutting the rope and just need to prevent the ends of a rope from fraying, hold the end of your rope over a match or candle flame. If you want to prevent the ends of a natural fiber rope from fraying, instead of fusing, you need to whip the rope. The diagram below has more detailed information on how to whip and fuse a rope.
Tape nylon, polyester, or polypropylene rope around the area to be cut, or the end. Cut in the middle of the tape leaving tape intact on each side. When cutting these fibers with a pocket knife or scissors, the cut ends should be fused with a match or candle flame to prevent untwisting. Natural fiber ropes do not fuse.
Lay the twine along the rope and make a bight back along the rope. Note that the rope should be whipped a short distance (one and a half times the diameter) from its end.
Begin wrapping the twine around the rope and bight of twine securely. Wrap until the whipping is one and a half times wider than the rope is thick.
Run the working end of the twine through the bight. Carefully pull on the standing end of the twine until the bight and working end are pulled under the whipping (Note: It is normally necessary to maintain tension on the working end to prevent the bight from being dragged completely through otherwise the whipping will fall apart.) Cut the twine flush with the edges of the whipping to give the rope end a finished look.