TiggerToo
Well-Known Member
I am thinking of using Arbomast as a sealant. Is there any reason not to do this?
Rebedding Lewmar hatch
- Thread starter TiggerToo
- Start date
PaulRainbow
Well-Known Member
It's as good as anything for sealing the hatch assembly to the deck.
Seajet
...
+1 Go for it - just don't nod up and get any in your hair - guess how I know ! 
Aja
Well-Known Member
Not sure what you mean?
Do you mean it's good for sealing the acrylic to the hatch ... or for adhering the hatch assembly to the deck?
Any good sealant is what you require for the acrylic panel to the hatch such as http://http://www.force4.co.uk/dow-corning-marine-silicone-sealant-78g-m.html?utm_source=google_shopping&gclid=EAIaIQobChMIi_rMrYyM1gIVQbgbCh1hYAFYEAQYCCABEgIiwvD_BwE#.Wa2S-ct4WhA
Should do the trick.
Regards
Donald
PaulRainbow
Well-Known Member
Georgio
Well-Known Member
I hope not, it's exactly what I used on a deck hatch a week ago.
Ywiz
New Member
I'm rebedding a new acrylic lens in my lewmar hatch. Most of what I've red about sealing is pointing at DOW 795 as the best ( between the lens edge and aluminum frame) , but the problem is that I cannot buy it in Sweden, where I live. Amazon has it but cannot deliver to sweden due to shipping restrictions. Any idea ?
ditchcrawler
Well-Known Member
I fitted a new hatch at the end of last summer and used butyl tape which was for me easier than using a mastic gun. It comes in various thicknesses and widths and I
purchased mine off e bay. I used a 3mm thick roll and i cut it to shape, stuck it to the underside of the hatch frame and then peeled off the backing paper. I cut small pieces for the corners.
purchased mine off e bay. I used a 3mm thick roll and i cut it to shape, stuck it to the underside of the hatch frame and then peeled off the backing paper. I cut small pieces for the corners.
Bobc
Well-Known Member
Abromast is the right stuff. Just make sure you have lots of solvent and rags to wipe the excess away.
Boathook
Well-Known Member
Also do a 'dry' fit and mask of the surrounding area.
Bobc
Well-Known Member
I never bothered with masking. I just put a big bead of gob on the hatch rim and dropped it in, then screwed it down, and then scraped away the excess with a screwdriver and then cleaned it all up with rags and solvent.
You can wipe all the visible gob away. You don't need to leave any showing around the outside of the hatch.
You can wipe all the visible gob away. You don't need to leave any showing around the outside of the hatch.
Spyro
Well-Known Member
I used pu18. I thought it was wonderful stuff to work with but had to do it all again. It didn't stick to either the acrylic or the aluminium frame, cant rember which. Did it all again with ct1. Much better result.
vyv_cox
Well-Known Member
If it was originally bedded on silicone rubber, which I believe many are, a new adhesive may not adhere or may even not cure. Could it be that you cleaned up better the second time?
Spyro
Well-Known Member
It's possible, I never thought about that. I thought at the time I had removed all traces of the old sealer. Should PU18 stick to Aluminium and acrylic?
Swanrad2
Well-Known Member
+1 seemed to work well and so far, touvh wood, no leaks. The trick is not to stretch or compress the tape on the corners and to put a little turn around each of the through bolts. We bought ours from Hawkeshead marine from memory with some interscrews for re-bedding portlights (again, so far so good).
vyv_cox
Well-Known Member
Polyurethanes should stick reasonably well to both. My windows are glass with aluminium frames and it sticks well to both. Another boat has acrylic windows and sealing effectiveness of PU40 is excellent.
SteveGorst
Well-Known Member
+1 for this. I did it last year and have been through some serious seas with no leaks at all. I put it in place dry and drew a pencil mark around it. Then put masking tape up to the pencil mark. Apply arbomast to the bottom of the hatch and lower into place. Don't fully tighten straight away or you will squeeze it all out, leave it a week or two to go off and then tighten. Peel off the masking tape. I hope you use frogtape which doesn't stick. There are probably 101 ways of doing it but this is how I did it.
