mboat01 Posted August 20, 2020 Report Share Posted August 20, 2020 What would be best for bonding wood battens to inside hull above gunwales bare (primed) steel near windows ? - Epoxy (e.g., Araldite rapid 5 min syringe) or weatherproof sealant (e.g., Sikaflex EBT+ Polyurethane) ??. I want good bond from wood to steel but Im also concerned that needs to have some flexibility as sides of boat stretch and expand when facing sun. By instinct Id go with the epoxy - am I missing any obvious problems ?. Link to comment Share on other sites More sharing options...
WotEver Posted August 20, 2020 Report Share Posted August 20, 2020 Marineflex. Sikafkex (but I don’t know which one) Someone more knowledgeable than me will be along shortly. Link to comment Share on other sites More sharing options...
AndrewIC Posted August 20, 2020 Report Share Posted August 20, 2020 Based on other recommendations here, I’ve just re-stuck my back door linings on with Stixall. Ask me how it turned out in about 5 years or so Link to comment Share on other sites More sharing options...
RAP Posted August 20, 2020 Report Share Posted August 20, 2020 CT1. Available from most trade outlets or online. Link to comment Share on other sites More sharing options...
Tracy D'arth Posted August 20, 2020 Report Share Posted August 20, 2020 OB1, or cheaper PU18. Link to comment Share on other sites More sharing options...
mboat01 Posted August 20, 2020 Author Report Share Posted August 20, 2020 thanks ... though I am a padawan I should have foreseen ... the glue wars have begun ! a disturbance in the force I sense ? OB1 looks good Link to comment Share on other sites More sharing options...
Sir Percy Posted August 21, 2020 Report Share Posted August 21, 2020 I'm doing some battening below the gunwale. I've started off by making use of the angles which are already welded to the hull - drilled holes in the angles and bolted battens to them. Perhaps that approach would mitigate your movement worries? Would need some tabs welded. Wouldn't have thought an epoxy resin would give you the flexibility. Maybe one of the other sealant/adhesives could do the job. Link to comment Share on other sites More sharing options...
WotEver Posted August 21, 2020 Report Share Posted August 21, 2020 23 minutes ago, Sir Percy said: Wouldn't have thought an epoxy resin would give you the flexibility Me neither. All of the other adhesives/sealants mentioned have some flexibility. Link to comment Share on other sites More sharing options...
Ryeland Posted August 21, 2020 Report Share Posted August 21, 2020 I didn't bother trying to fix to the cabin sides. I built out from the below gunwale battens to secure the bottoms, and used a ceiling batten hard up against the tops. I think if was doing it again, I would do the same but add PU40 sealant as well. I wouldn't like to rely on sealant and the primer, it relies on both the primer bond to the steel and the sealant to the primer. Richard Link to comment Share on other sites More sharing options...
Chris Lowe Posted August 21, 2020 Report Share Posted August 21, 2020 Link to comment Share on other sites More sharing options...
mboat01 Posted August 21, 2020 Author Report Share Posted August 21, 2020 Thanks All. Is clamping pressure a factor ? - I know epoxy doesnt like high clamp pressure, whereas PVA adhesives do. With where I need to fix in to Im not going to be able to put a clamp on at all. Ill just have to put in the adhesive, push down on the wood, and hope for the best. I know that would work fine with epoxy, but consensus seems to be that isnt flexible enough. So I guess question is which of OB1 or SikaTack do you think would be best in that usage scenario ? Link to comment Share on other sites More sharing options...
Chris Lowe Posted August 21, 2020 Report Share Posted August 21, 2020 We used just Sikatak to stick all those coloured vertical strips to this building none of them have come off. Link to comment Share on other sites More sharing options...
blackrose Posted August 21, 2020 Report Share Posted August 21, 2020 (edited) 21 hours ago, WotEver said: Marineflex. Sikafkex (but I don’t know which one) Someone more knowledgeable than me will be along shortly. Yes or the cheaper but equally good alternative, Stixall from Toolstation. It's important to key both surfaces and wipe clean with a cloth dampened with white spirit first. After 24 hours you'll need a hammer and chisel to remove the batten and yet it's still a flexible bond. Edited August 21, 2020 by blackrose Link to comment Share on other sites More sharing options...
Chris Lowe Posted August 21, 2020 Report Share Posted August 21, 2020 To stick those verticals onto that building we used Sikabond AT and they have stood up to all weather. Link to comment Share on other sites More sharing options...
jacko264 Posted August 21, 2020 Report Share Posted August 21, 2020 We use tiger sealer at work and never had a problem try to put a pro or tape to hold the wood in place until the sealer dries Link to comment Share on other sites More sharing options...
Murflynn Posted August 21, 2020 Report Share Posted August 21, 2020 PU18 for all non-structural bonding of battens, panels, etc. cheap as chips, tolerates dampness on surfaces being bonded, works like a magnet - strong bond, but when the time comes to strip it off it comes away cleanly with a sharp knife. cleans up with white spirit. Link to comment Share on other sites More sharing options...
Tracy D'arth Posted August 21, 2020 Report Share Posted August 21, 2020 To hold the battens whilst the whatever glue sets use thin wooden lath wedged across the cabin. Link to comment Share on other sites More sharing options...
mboat01 Posted August 21, 2020 Author Report Share Posted August 21, 2020 (edited) 1 hour ago, Tracy D'arth said: To hold the battens whilst the whatever glue sets use thin wooden lath wedged across the cabin. Thats brilliant idea ... and got me googling - i cant see why https://www.screwfix.com/p/extending-support-rod-2-95m/14003 braced across cabin shouldnt work. Thanks so much for the inspiration !. Now just got to settle on glue ... so far about 10 options ? (options mentioned so far = Marineflex, Sikaflex, Stixall, CT1, OB1, PU18, SikaTack, Tiger sealer) Edited August 21, 2020 by Sassy Lass Link to comment Share on other sites More sharing options...
WotEver Posted August 21, 2020 Report Share Posted August 21, 2020 5 minutes ago, Sassy Lass said: Marineflex, Sikaflex, Stixall, CT1, OB1, PU18, SikaTack, Tiger sealer Yup, one of those would be perfect Here’s that link again (yours is broken) and yes, it’d work fine. https://www.screwfix.com/p/extending-support-rod-2-95m/14003 Link to comment Share on other sites More sharing options...
mboat01 Posted August 21, 2020 Author Report Share Posted August 21, 2020 thanks. OB1 is a nose ahead into final straight and data sheet says full cure time is 24hrs .. think me arms would be tired pushing in place for that long Link to comment Share on other sites More sharing options...
Tracy D'arth Posted August 21, 2020 Report Share Posted August 21, 2020 I have used 5 minute polyurethane wood glue cartridges for sticking all sorts of things, its so fast it makes it easy. Screwfix sell it, foams a bit as it sets filling gaps a treat. and its cheap. Link to comment Share on other sites More sharing options...
WotEver Posted August 21, 2020 Report Share Posted August 21, 2020 12 minutes ago, Tracy D'arth said: foams a bit as it sets filling gaps a treat. and its cheap. But not very flexible. In fact, quite hard and brittle. Sticks like wotsit to a blanket though. Link to comment Share on other sites More sharing options...
WotEver Posted August 21, 2020 Report Share Posted August 21, 2020 35 minutes ago, Sassy Lass said: thanks. OB1 is a nose ahead into final straight and data sheet says full cure time is 24hrs .. think me arms would be tired pushing in place for that long Link to comment Share on other sites More sharing options...
Murflynn Posted August 22, 2020 Report Share Posted August 22, 2020 8 hours ago, WotEver said: But not very flexible. In fact, quite hard and brittle. Sticks like wotsit to a blanket though. and is difficult to clean up as a result, except on hard glossy surfaces where it doesn't stick at all. Link to comment Share on other sites More sharing options...
TheBiscuits Posted August 22, 2020 Report Share Posted August 22, 2020 12 hours ago, WotEver said: Yup, one of those would be perfect Is it not like varnish then? You should have used the other one ... Link to comment Share on other sites More sharing options...
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