Sealant for water tank hatch

[dgadee]

Dehler manual says - if my German still works - that a sealant is used to seal the water tank inspection hatch. I have nitrile rings for these tanks. What should I use along with these rings as sealant?

Manual says: "Um den Tank zu reinigen, ist ein Inspektionsdeckel montiert. Der Deckel ist mit Dichtmasse zusatzlich eingedichtet. Nur mit einem langarmigen Hilfs-werkzeug lafit sich der Deckel zerstdd-rungsfrei herausdrehen."

 

[superheat6k]

Personally I would use silicone grease or vaseline.

 

[coopec]

Dehler manual says - if my German still works - that a sealant is used to seal the water tank inspection hatch. I have nitrile rings for these tanks. What should I use along with these rings as sealant?

Manual says: "Um den Tank zu reinigen, ist ein Inspektionsdeckel montiert. Der Deckel ist mit Dichtmasse zusatzlich eingedichtet. Nur mit einem langarmigen Hilfs-werkzeug lafit sich der Deckel zerstdd-rungsfrei herausdrehen."

According to my on-line translator that translates to

"To clean the tank, an inspection lid is mounted. The lid is with thick mass zusatzlich eingedichtet. Only with a long-armed charitable organization stuff lafit to itself the lid zerstdd-rungsfrei unscrew"

So what's the problem?

 

[coopec]

Je crois que vous constaterez qu'ils parlent de l'enduit étanché entre le couvercle d'inspection et le panneau mobile. N'importe quel enduit étanché qui est convenable pour l'eau potable, sûrement, serait bien.

 

[dgadee]

According to my on-line translator that translates to

"To clean the tank, an inspection lid is mounted. The lid is with thick mass zusatzlich eingedichtet. Only with a long-armed charitable organization stuff lafit to itself the lid zerstdd-rungsfrei unscrew"

So what's the problem?

The problem seems to be your on line translator. It needs some vaseline.

 

[vyv_cox]

I added a water tank inspection hatch, matching the existing one that is around 30cm square. I bought neoprene sheet from Seals Direct, although nitrile would be almost as good, and used silicone sealant to bed it. I would think that silicone grease would also work well.

 

[ghostlymoron]

I can't see the point of using sealant when you have a flexible gasket. The gasket alone will make a seal or what is it for?

 

[dgadee]

I can't see the point of using sealant when you have a flexible gasket. The gasket alone will make a seal or what is it for?

I think it's because it is not a very good design of inspection hatch.

 

[vyv_cox]

I can't see the point of using sealant when you have a flexible gasket. The gasket alone will make a seal or what is it for?

The gaskets on my two hatches are fairly hard, inch wide neoprene. I didn't think they would flex enough to provide a leak-tight joint for what is a very violent action when under sail. The top of the tank, to which the hatch is fitted, is GRP layup, so not very smooth.

 

[theguerns]

We use a product called CT1. I have ben in the boat building game for 50years and it is the best I have seen

 

[dgadee]

We use a product called CT1. I have ben in the boat building game for 50years and it is the best I have seen

Is it undoable? Looks like an adhesive more than a sealant.

 

[theguerns]

Yes I have had to remove this sealant adhesive after changing things around and the seal can be cut with a sharp blade. To give you an idea I attached a piece of polished stainless steel to our steel rudder and after a year it was still there I cut it off wityh a sharp knife.