plastic inspection hatch sealant

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miracle
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plastic inspection hatch sealant

Post by miracle » Sat Mar 22, 2014 12:33 am

which one is ok to use , was thinking about regular bathroom silicone sealant

mirror miracle, hatch going in the ply deck

Rupert
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Re: plastic inspection hatch sealant

Post by Rupert » Sat Mar 22, 2014 5:28 pm

Do all the varnishing first, and any of them are fine. If buying specially, then maybe avoid silicone? I never have, mind, and have had no problems.
Rupert

JimC
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Re: plastic inspection hatch sealant

Post by JimC » Sat Mar 22, 2014 5:45 pm

Get one of the recent design hatches with an O ring round the outside and its not a problem...

miracle
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Re: plastic inspection hatch sealant

Post by miracle » Sat Mar 22, 2014 8:56 pm

again thankyou folks valuable help :D

fcdbm
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Re: plastic inspection hatch sealant

Post by fcdbm » Sun Mar 23, 2014 9:49 am

Hi, I used Sikaflex marine sealant.

It has an amazing bond, and it sticks to everything....

....so mask the area around the hatches otherwise it will be smeared everywhere.

If you do use silicone sealant, I would use a glazing grade and use the best you can buy. Alot of the cheaper sealants have fillers which is fine indoors around a loo but not so good when they should be resisting water pressure when capsized.

What type of hatch are you using? I used the RWO screw in hatch.

Make sure you line the hatches up so the opening bar or handle is vertical or horizontal when shut. That means you can always check that they are properly done up..... and they don't drive you mad because they don't look right. (OCD or what!!)

miracle
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Re: plastic inspection hatch sealant

Post by miracle » Sun Mar 23, 2014 1:04 pm

fcdbm wrote:Hi, I used Sikaflex marine sealant.

It has an amazing bond, and it sticks to everything....

....so mask the area around the hatches otherwise it will be smeared everywhere.

If you do use silicone sealant, I would use a glazing grade and use the best you can buy. Alot of the cheaper sealants have fillers which is fine indoors around a loo but not so good when they should be resisting water pressure when capsized.

What type of hatch are you using? I used the RWO screw in hatch.

Make sure you line the hatches up so the opening bar or handle is vertical or horizontal when shut. That means you can always check that they are properly done up..... and they don't drive you mad because they don't look right. (OCD or what!!)
cheers fcbdm , the hatch i have also came with a 6 inch piece of thin plastic with two small holes at each end , ill post a pic later , no idea what that's for, ill get some decent quality sealant as you say,no point in skimping.

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Nessa
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Re: plastic inspection hatch sealant

Post by Nessa » Mon Mar 24, 2014 11:56 am

Does anyone have a pic of the winner of the Wingnut trophy from last year's Nationls? I have not been able to think about sealant in the same way since.

I match my sealant to how much I care about the boat, so a club laser gets the Tesco value version.
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Graham T
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Re: plastic inspection hatch sealant

Post by Graham T » Mon Mar 24, 2014 12:10 pm

You also have to think about removal - might you want to take the fitting off again? Sikaflex can mean the fitting is never going to be removed without damage. For tank hatch covers on a wooden boat I might want to remove them for varnishing so would tend to use a bog standard silicone. It is just acting as a bedding compound and will be adequate to keep water from passing.
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miracle
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Re: plastic inspection hatch sealant

Post by miracle » Mon Mar 24, 2014 1:23 pm

Graham T wrote:You also have to think about removal - might you want to take the fitting off again? Sikaflex can mean the fitting is never going to be removed without damage. For tank hatch covers on a wooden boat I might want to remove them for varnishing so would tend to use a bog standard silicone. It is just acting as a bedding compound and will be adequate to keep water from passing.
great point graham, thinking ahead . :D

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