Best adhesive for rubber sail drive flange on bottom of boat

[keensailor]

Hi
I have bought a new rubber flange and want to glue it to the bottom of the hull where the sail drive exits the hull.
I was advised on Locktite 480, but after buying it and doing a small test it does not look suitable. It is runny and does not bond on contact as advertised.
I though one of the Sika's but unsure on which one.

Boat is on slip now, so don't have much time.
Thx in advance.

 

[tawhiri]

This has been done before and an epoxy based adhesive was deemed the best. No idea what brand name

 

[bigwow]

Bostic or Evo Stick contact adhesive. Rough up both surfaces then wipe clean, I used surgical spirit, let the glue go off then after putting on the gaiter give it the once over with a wallpaper seam roller. Worked for both of mine.

 

[Seashoreman]

Bostic or Evo Stick contact adhesive. Rough up both surfaces then wipe clean, I used surgical spirit, let the glue go off then after putting on the gaiter give it the once over with a wallpaper seam roller. Worked for both of mine.

I believe this is the official recommended method. That's how mine was done and it works fine.

 

[typhoonNige]

Tried the contact adhesive route and lost 2 in successive seasons. Then splashed out on Sikaflex 292 5 years ago and its still holding on. Not sure if it will come off if I ever need to remove it though!

 

[johnphilip]

The rubber seal fell off our saildrive during the first season we had the boat. The chandlery recommended Bisonite. It has been on 6 years so far and (touch wood) no sign of failing.
http://www.bison.net/en/products/647-2-components-adhesives/product/2269-power-adhesive-bisonite/

 

[duncan99210]

I used a local Sicaflex type sealant/adhesive on ours a couple of years back. Still going strong.

 

[TradewindSailor]

+1 re contact adhesive not working and Sika 292 fine

I currently use epoxy (West System + colloidal silica to thicken it) ...... but it does leave a hard residue that needs to be ground off next time. 3M 5200 is also good. If you only have a small sticking area you may have to support the rubber while the adhesive cures ..... maybe a few self-tappers ..... but I managed without.

 

[Laurie]

I don't like the ideas of epoxies or similar or contact adhesives for this. When I had a saildrive powered yacht (for 14 years) I used Sikaflex 292. It remains flexible and waterproof with excellent adhesive properties. Just what you want.
Bonding surfaces must be clean and grease free (degreased), and then lightly abraded. Use a small metal roller from centre outwards. Works very well.:encouragement: