EXPERT ADVICE
ADDITIVES
Understanding and Caution in their usage .
by Girish C Dubey
The use of additives in sealcoating coincides with the very introduction of sealcoatings in the 60 ’ s . Additives based on specialty latex / rubber polymers have been a part of the FAA Specification since early 1970 ’ s . Considering the myriad of additives available today , it is imperative to understand the basic chemistries of such additives and select the ones that will truly enhance the performance of the sealcoating in terms of better flexibility , toughness , fuel & chemical resistance and overall longevity . Sealcoating specifications , delineating the proper ratios of various components in the mix design are of critical importance for the optimum performance of sealcoating systems .
The use of additives has enabled sealcoating professionals to use sealcoatings even in unfavorable ambient application conditions and still accomplish the optimum performance out of sealcoatings . Although it may appear that most of the additives are
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