Sealant for bedding stanchion bases

[davidmh]

I have to re-bed some stanchions on a teak laid deck. In the old days I would have used Sealastic sealant which does not harden, sealed well and it was easy to remove the stanchion later without damage to the teak. A lot of todays sealants such as PU40 and CT1 seem to be adhesives as well as sealants. What would the forum suggest to give a degree of movement, that seals well and is easy to remove,

David MH

 

[wallacebob]

Butyl tape, perfect for all above water sealing. Clean, cheap, easy to use.

 

[Hacker]

+1 for butyl

 

[davidmh]

Did think of Butyl. What widths can you get? How would you cover the 75 mm dia base of the stanchion.
David MH

 

[doug748]

You can get it in a tube:

Adshead Ratcliffe Arbo Mastic Sealants Tapes & More Online - Adshead Ratcliffe Arbo Arbomast BR Butyl Sealant -

Very messy to use, though I quite like it myself, keeps well.

.

 

[Hacker]

You would put a strip around the perimeter of the base and around the screw holes. Put a bit around the screw heads when you put them in. Can get it either as a strip or in a tube. I’ve got a strip, easy to apply but a bit sticky.

 

[RunAgroundHard]

Don’t use the stuff in a tube, it is not the correct product. Use the butyle tape as others have said. I use this on the boat, white colour:-

Butyl Tape Flexistrip

Unwrap a length, place where you need it, then peal off the backing paper. Or peal off the backing paper and mould, like BlueTack, into whatever shape you need. Make sure your hands and fingers are clean as dirt gets absorbed by the material and it looses a bit of its stickiness, but that doesn’t matter, just makes it a bit more difficult to place.

Good information on using butyle tape:-

Bedding Deck Hardware With Bed-IT Tape - Marine How To

The stuff they sell is a bit different but the standard butyle sealing strip is more than good enough.

Good luck with your project.

 

[doug748]

Don’t use the stuff in a tube, it is not the correct product......

Ey up, the internet police have arrived, quick run out the back.

 

[RunAgroundHard]

Ey up, the internet police have arrived, quick run out the back.

Really!

 

[Boathook]

Don’t use the stuff in a tube, it is not the correct product. Use the butyle tape as others have said. I use this on the boat, white colour:-

Butyl Tape Flexistrip

Unwrap a length, place where you need it, then peal off the backing paper. Or peal off the backing paper and mould, like BlueTack, into whatever shape you need. Make sure your hands and fingers are clean as dirt gets absorbed by the material and it looses a bit of its stickiness, but that doesn’t matter, just makes it a bit more difficult to place.

Good information on using butyle tape:-

Bedding Deck Hardware With Bed-IT Tape - Marine How To

The stuff they sell is a bit different but the standard butyle sealing strip is more than good enough.

Good luck with your project.

I've never had a problem with tube product from Adshead Ratcliffe Arbo Arbomast BR Butyl Sealant. Cleaning is a chore though so plenty of masking tape and gloves !

 

[PabloPicasso]

Did think of Butyl. What widths can you get? How would you cover the 75 mm dia base of the stanchion.
David MH

Lay it in strips next to each other to cover or bed the area required

It'll all squeeze together as you tighten it down anyway. Trim off the excess and put in a plastic tub for another job.

Butyl tape is cheap, waterproof, great above the waterline, never goes off, and is even re-useable.

 

[Paul1962]

You can get it in a tube:

Adshead Ratcliffe Arbo Mastic Sealants Tapes & More Online - Adshead Ratcliffe Arbo Arbomast BR Butyl Sealant -

Very messy to use, though I quite like it myself, keeps well.

.

+ 1 for Arbomast BR - Excellent

 

[davidmh]

Thanks for all the comments, it seems Butyl is the way to go either strip or bead. the tips on handling it are usefull. Clean dry hands has been mentioned, has anyone tried handling with latex or similar gloves?
David MH

 

[B27]

In a flexing joint like a stanchion on a teak deck, buytl tape will work unti it exudes out from the join and fails to seal.

If the teak is not itself sealed, sealing a stanchion base onto its top face is not going to work anyway.

 

[davidmh]

B27, what would you use to bed in a stanchion base on teaking decking bonded onto GRP?

David MH

 

[Rappey]

Butyl tape is excellent. It can be very sticky and sticks to fingers and gloves. I lick my fingertip to push it down as that gives me a temporary non stick finger.
You may get the butyl slowly creeping out from the joint over time but a small price to pay for a nearly permanet waterproof joint
Around £14 from toolstation, 10m x 5cm roll. About 1.5mm thick ?
Butyl out of a tube can dry out on things like wood.
My other go to that is equally as good and in some circumstances better is pvc foam tape used for glazing. Has incredible initial grab, temporarily neutralised by soapy water. A lot of these foam tapes look the same but they are not.
Any double glazing trim shop can sell you a roll. Usually 25m x 10mm and 3mm thick.

 

[B27]

B27, what would you use to bed in a stanchion base on teaking decking bonded onto GRP?

David MH

Personally I'd drill the teak around the fasteners to give a clearance of at least a couple of mm around each bolt, then use a polyurethane sealant around each bolt. That would seal the stanchion base to the GRP. You might usefully prime the teak hole surfaces if you see what I mean, maybe even use some wood preserver, to slow the inevitable decay of the teak.

Problem is, the teak will slowly decay, so the bolts slowly go slack.
Which is why I'd avoid a teak deck.

 

[Rappey]

Problem is, the teak will slowly decay, so the bolts slowly go slack.

Im not sure that is a problem as I've seen many teak decks where the item mounted is a few mm higher than the rest of the deck suggesting the item is preventing any wear of the teak immediately under it