Any customer who uses odorants in  their end products, needs masking agents. U3S Chemsolutions offers Chevron Phillip’s Nose Guard® masking agents. Nose Guard®  is very effective in masking the offensive odor caused by the trace quantities of the odorants. Whilst  Nose Guard® masking agents does not eliminate the offensive odor caused by miniscule residues of the odorant which cling on to the valves, containers, drums, surfaces, but it very effectively masks it with a pleasant citrus scent.