Alternative for 5200/4300

[FF]

Frequently "thru hulls" are used with sea cocks.

The solidly bolted sea cock keeps the water out of the boat , the thru hull perhaps keeps the hull laminate dry.

On inspected vessels the thru hull may be pulled for inspection at times , so some sort of glue as a sealer serves NO purpose , except to make the task harder.

Taking a look is a great idea , USCG requirement or not , especially after 20-45 years.

 

[Stout]

Tremco moisture cured polyurethane sealant

Hi Tony, which of Tremco's moisture cured polyurethane sealants do you use, the Vulkem 116 or 45SSL?

 

[BrianSmith]

Brain,

Like many products, not every market is gone after by the manufacturer. You could take the product, repackage and put "marine" all over it, do a few tests and triple the $$..It's that easy.. That does not make it any better, only way more expensive.. 3M 5200 is a great product, but the cost is beyond crazy, and in actual use, offers nothing better than than many other 1/4 or less priced polyurethanes.

My testing of various moisture cured polyurethanes and hybrid silicone's (GE Ultraglaze 4000 for one) over the past 25+ yrs and proved that to me beyond any doubt... Maybe 95% of the work we preform and methods we use to accomplish what we do has never been "certified" for marine use..ABYC has there place , but there is way more to a product than that. It's all about long term field testing in my book, but also realizing that there is always room for improvement..


Tony

Tony,

That's exactly why I asked you if YOUR experience with the product is in salt or fresh. I'm assuming it's probably in salt, or maybe both - but you know what they say about assuming.