Similar incidents of glue sniffing among destitute youth in the Philippines have also been reported, most commonly from groups of street children and teenagers collectively known as "Rugby" boys, which were named after a brand of toluene-laden contact cement. Other toluene-containing substances have also been subject to abuse, most notably the Vulca Seal brand of roof sealants. Bostik Philippines, which currently owns the Rugby and Vulca Seal brands, has since responded to the issue by adding bitterants such as mustard oil to their Rugby line, as well as reformulating it by replacing toluene with xylene. Several other manufacturers have also followed suit.