original: uses tar was also used as seal for roofing shingles and to seal the hulls of ships and boats .
simplifications: uses tar was also used as seal for roofing shingles and to seal the hulls of ships and boats . tar was also used to seal roofing shingles and the hulls of ships and boats . tar was used as a sealant for roof shingles , and also sealing the hulls of ships and boats . tar was used to seal roofing shingles and the hulls of ships and boats . tar has different uses . it is used as seal for roofing shingles . it is also used to seal the hulls of ships and boats . uses tar was also used as seal for roofing shingles and to seal the hulls of ships and boats . tar was also used as seal for roofing shingles and to seal the hulls of ships and boats . uses tar was also used as a seal for boat and ship hulls and roofing shingles .