You can also purchase it at any heating and air conditioning (HVAC) supply store. We use it to seal high pressure duct flanges for an air tight joint. Grey in color.
I concur completely. I am on Lake Ontario, so while we don't have the salt, our freeze/thaw cycles are as brutal as Maine's if not worse (we are enjoying one today, for instance!).Yes I cover the entire base of the fitting then tighten it down. It's best to wait for a hot day and the butyl will compress easier.. The problem with us NE boaters is that water can get under a fitting and expand and yuo don't want that so it's best to seal the entire base. Get the thin flat butyl tape. I think mine is 1/16" thick if I am not mistaken.
If you're using a good countersink bit, run it in reverse so you don't countersink too large a hole... It won't chip the gel coat if it is run in reverse either.This butyl tape thread is very interesting. Last Autumn I removed my grab rails for refinishing (looked like they had not been removed since my Islander was built in 1984). Who put them on used something red that worked like glue (and is now hard as a rock). No clue what that was.
I've been wondering what to use to reattach my grab rails to the deck. What do you think? Is butyl tape the best product given the roughness of the wood?
I have a some questions about beveling. To create the bevel are you simply using an oversized drill bit to countersink or is there some other method? Having never drilled through gelcoat I am concerned about chipping.
Also, are you beveling all holes (including those under chainplates, stanchions, etc.)?
So if the car track is 3/4 inches wide, is it best to use 3/4 inch wide tape, or 1/2 inch tape? I am guessing that when the bolts are tightened, the tape compresses and oozes out a certain amount...
Nah, I don't have any, i was about to order some and was trying to decide what size. I'll get some of each At $3.50 a roll, ya can't have too much!
Went by the local Marine store the otherday,and they have butyl tape, but it is $21/roll. Off to the RV Center one afternoon this week!Nah, I don't have any, i was about to order some and was trying to decide what size. I'll get some of each At $3.50 a roll, ya can't have too much!