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Old 06-09-2012
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Re: Bedding Deck Hardware With Butyl Tape

Originally Posted by trk2 View Post
Hello everyone. The quality of information in this thread caused me to register on Sailnet. Many thanks.

I am seeking confirmation that "Duct Seal" sometimes known as "Duct Seal Putty" is the same material as butyl tape but has the advantage of being more readily available for purchase and economical. Some of you may be familiar with duct seal as it often used to seal around electrical service entrance cables where they enter the meter housing.

I've used both butyl tape and duct seal in the past and they seem identical. The MSDS for duct seal lists the chemical family as "butyl rubber composite" which sounds promising?
Just like with polyurethane sealants there are many differing grades and compositions and some are more suitable than others to marine applications. Duct Seal is not the same as Bed-It Tape. Could it work? Sure, but having tested over 40+ products sold as "butyl tape" I can assure you the variances are far and wide. Some of these tapes are sold for less than 1/3 what I pay direct from the manufacturer.. "Fillers", recycled content", "solvents" and all sorts of other things can be added to the product to make it less costly, but they don't make it better...
-Maine Sail / CS-36T

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