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I was told recently that the caulking that I use to seal up my
customers' homes could be outlawed.  We are a siding and window
contractor who use Quad and NPC sealant for sealing around
windows, doors, corners, etc.  I use these petroleum based rubber
sealant's because it adheres the best in moist weather.  Its
flexibility and ability to adhere during all weather conditions
has been the best for our business.  We have tried using other
sealant's in the past and have had service claims where caulking
has cracked or deteriated within a few years.

When doing projects such as fiber cement, caulking is essential to
sealing up around windows and without the best sealant in the
market, we would be doing homeowners a dis-service.  Please do not
outlaw these selaants or at least provide a contractor's exception!
 Thanks!