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19 April 2013, 22:04
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#1
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Member
Country: UK - England
Town: Birchington
Boat name: Moneypenny
Make: Avon SR 5.4
Length: 5m +
Engine: Yam 90
Join Date: May 2008
Posts: 182
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epoxy or polyester
A technical one please guys
I have a couple of areas on my deck which I have had to srtip back to bare plywood,
can I bond the CSM back to the deck with polyester resin or does the initial layer need to be adhered to the deck with epoxy?
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19 April 2013, 22:36
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#2
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Member
Country: UK - Channel Islands
Town: A large rock
Boat name: La Frette
Make: Osprey Vipermax
Length: 6m +
Engine: 200 Suzzy
Join Date: May 2004
Posts: 2,893
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Epoxy is a better adhesive and is also the better choice if you don't know what your existing grp is based on. If you know it is polyester, then polyester would be fine too.
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19 April 2013, 22:55
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#3
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Member
Country: Finland
Town: Helsinki
Boat name: SR 5.4
Make: Avon
Length: 4m +
Engine: Toh1 3,5 Yam 90/2S
Join Date: Oct 2009
Posts: 919
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Epoxy is much better in bonding than polyester, but if you need to laminate the area, You cant use standard CSM together with epoxy(most of the CSM grades are compatible only with polyester resin).
Gel/topcoat will not bond so well on epoxy either. I would use polyester unless serious doubts that boat is laminated with epoxy.
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fun on a boat is inversely proportional to size...sort of anyway
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19 April 2013, 23:27
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#4
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Member
Country: UK - Scotland
Town: Edinburgh
Boat name: D Hollins
Make: pacific 38
Length: 10m +
Engine: Twin 212 hp Diesel
Join Date: Dec 2001
Posts: 176
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This is correct, I would use polyester resin. Epoxy will sometimes not be compatible with the original polyester, and new polyester resin or gel /topcoat will not bond to epoxy.
I have tried this before, epoxy is great for bonding to wood but on this application you would be safer to use polyester.
Good luck
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20 April 2013, 15:36
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#5
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Member
Country: UK - England
Town: Birchington
Boat name: Moneypenny
Make: Avon SR 5.4
Length: 5m +
Engine: Yam 90
Join Date: May 2008
Posts: 182
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Cheers for the info guys, much appreciated. Does anybody know the lay up of the military spec SR 5.4's epoxy or polyester?
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20 April 2013, 17:03
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#6
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RIBnet admin team
Country: UK - England
Town: The wilds of Wiltshire
Boat name: Dominator
Make: SR5.4
Length: 7m +
Engine: Yam 85
MMSI: 235055163
Join Date: Jul 2005
Posts: 13,069
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Polyester.
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20 April 2013, 19:10
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#7
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Member
Country: Finland
Town: Helsinki
Boat name: SR 5.4
Make: Avon
Length: 4m +
Engine: Toh1 3,5 Yam 90/2S
Join Date: Oct 2009
Posts: 919
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As Nos4r2 say, polyester. On mine, the deck is laminated with coloured resin(grey) all the way down to the plywood(one can say its laminated using gelcoat?), newer seen that on any other boat.
It had also a black tar/rubber like layer beneath the surface paint. Worst stuff ever to sand away...but that layer was most likely not factory made. Either it has served as a kind of a camouflage or then, no idea....
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fun on a boat is inversely proportional to size...sort of anyway
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20 April 2013, 20:49
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#8
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Member
Country: UK - England
Town: Birchington
Boat name: Moneypenny
Make: Avon SR 5.4
Length: 5m +
Engine: Yam 90
Join Date: May 2008
Posts: 182
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Thanks Nos, yeah mine had that tar type stuff all over the deck, I've had the whole inside shot blasted and its save so much time and also given me a perfect etched finish for applying CSM and flow coat. Will try and upload piccies
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20 April 2013, 21:25
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#9
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Member
Country: UK - England
Town: Birchington
Boat name: Moneypenny
Make: Avon SR 5.4
Length: 5m +
Engine: Yam 90
Join Date: May 2008
Posts: 182
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This is what I found after a bit of scrubbing and scraping so decided she deserved a proper job. Next step shot blasting
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20 April 2013, 21:30
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#10
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Member
Country: UK - England
Town: Birchington
Boat name: Moneypenny
Make: Avon SR 5.4
Length: 5m +
Engine: Yam 90
Join Date: May 2008
Posts: 182
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Shot blasting complete, still some prep work to do. I have sourced two 25 litre Avon fuel bladders so only want one recess for the Barrus tanks. Out with the circular saw and grinder and on with the Jasper outfit and mask!!
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20 April 2013, 21:35
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#11
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Member
Country: UK - England
Town: Birchington
Boat name: Moneypenny
Make: Avon SR 5.4
Length: 5m +
Engine: Yam 90
Join Date: May 2008
Posts: 182
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Cutting and grinding all done ready for two layers of CSM plus a bit more around transom area, also cleaned up the hypalon circular floor patches ready for re use
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20 April 2013, 21:38
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#12
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Member
Country: UK - England
Town: Birchington
Boat name: Moneypenny
Make: Avon SR 5.4
Length: 5m +
Engine: Yam 90
Join Date: May 2008
Posts: 182
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Trust me to upload two identical photos, Doh! Not too bad for a days work, itching like crazy now though!
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20 April 2013, 21:54
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#13
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Member
Country: UK - England
Town: Royal Wootton Bassett
Length: 8m +
Engine: 250
Join Date: Jul 2008
Posts: 8,047
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Good job!  are you keeping the foot boards in?
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20 April 2013, 21:54
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#14
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Member
Country: UK - England
Town: Bromsgrove
Boat name: Kick-Ass !
Make: PAC/Artic 22
Length: 6m +
Engine: 250hp Yamaha
Join Date: Nov 2003
Posts: 3,577
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Quote:
Originally Posted by woody73
Trust me to upload two identical photos, Doh! Not too bad for a days work, itching like crazy now though!
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Wait till you get in bed, sumat about bed sheets when you have been working with fibre glass products, it itches like mad
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˜™
MY BIGGEST WORRY IS THAT MY WIFE(WHEN I"M DEAD)WILL SELL MY TOY'S FOR WHAT I SAID I PAID FOR THEM.
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20 April 2013, 21:58
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#15
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Member
Country: UK - England
Town: Royal Wootton Bassett
Length: 8m +
Engine: 250
Join Date: Jul 2008
Posts: 8,047
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Quote:
Originally Posted by nugent
Wait till you get in bed, sumat about bed sheets when you have been working with fibre glass products, it itches like mad
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Cold shower, not hot as it opens the pores and lets the fibres in 
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20 April 2013, 22:08
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#16
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Member
Country: UK - England
Town: Birchington
Boat name: Moneypenny
Make: Avon SR 5.4
Length: 5m +
Engine: Yam 90
Join Date: May 2008
Posts: 182
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Quote:
Originally Posted by whisper
Cold shower, not hot as it opens the pores and lets the fibres in |
Bit late for that info Alex, I've already had three hot showers today!
I'm leaving the foot boards in but not re-fitting the foot holds as my boots don't fit in them anyway, plus a trip hazard for the kids.
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20 April 2013, 22:28
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#17
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Member
Country: UK - England
Town: Royal Wootton Bassett
Length: 8m +
Engine: 250
Join Date: Jul 2008
Posts: 8,047
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Quote:
Originally Posted by woody73
Bit late for that info Alex, I've already had three hot showers today!
I'm leaving the foot boards in but not re-fitting the foot holds as my boots don't fit in them anyway, plus a trip hazard for the kids.
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Straps?
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20 April 2013, 22:40
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#18
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Member
Country: UK - England
Town: Birchington
Boat name: Moneypenny
Make: Avon SR 5.4
Length: 5m +
Engine: Yam 90
Join Date: May 2008
Posts: 182
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Quote:
Originally Posted by whisper
Straps?
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Yeah straps are going back in, only because I think they look cool!
I want it as original as possible but with a few tweaks to make it more practical for the family
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20 April 2013, 23:02
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#19
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Member
Country: UK - England
Town: Royal Wootton Bassett
Length: 8m +
Engine: 250
Join Date: Jul 2008
Posts: 8,047
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Quote:
Originally Posted by woody73
Yeah straps are going back in, only because I think they look cool!
I want it as original as possible but with a few tweaks to make it more practical for the family
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Nice one
I don't want to give you any extra work  but does you barrus tank fit in the raised section, I only say this as most don't and you have come this far..... 
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20 April 2013, 23:33
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#20
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RIBnet admin team
Country: UK - England
Town: The wilds of Wiltshire
Boat name: Dominator
Make: SR5.4
Length: 7m +
Engine: Yam 85
MMSI: 235055163
Join Date: Jul 2005
Posts: 13,069
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Quote:
Originally Posted by whisper
Nice one
I don't want to give you any extra work but does you barrus tank fit in the raised section, I only say this as most don't and you have come this far..... |
Yup, only one out of my 3 fits in the section properly. Barrus tanks seem to be a bit variable on size.
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