Minnesota Classic Glastron Forum
General Category => General Discussion => Topic started by: Diamond Chad on May 30, 2018, 09:28:37 AM
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The original front seats in the 87 CVX-16 are made of hollow blow molded plastic. When we got it, the bottoms had already been cracked and broken and so bolted onto 1/2 plywood through the base, not adjustable. WE want to retain the original seats, the upholstery is in good shape. I am trying to think of a way to reinforce the original base material and re-attach to seat sliders.
Has anyone successfully solved this? Maybe fill the inside with a kind of structural foam? Stuff it with resin soaked chunks of plascore? wrap in glass? how to get anything to stick to the slippery plastic?
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The original front seats in the 87 CVX-16 are made of hollow blow molded plastic. When we got it, the bottoms had already been cracked and broken and so bolted onto 1/2 plywood through the base, not adjustable. WE want to retain the original seats, the upholstery is in good shape. I am trying to think of a way to reinforce the original base material and re-attach to seat sliders.
Has anyone successfully solved this? Maybe fill the inside with a kind of structural foam? Stuff it with resin soaked chunks of plascore? wrap in glass? how to get anything to stick to the slippery plastic?
I'd fill it with expandable foam...seal it over with flex tape...I mean...we can cut holes in boats and it'll keep it afloat...so what could go wrong! ;)
Ok, expandable foam and then yeah, seal over the cracks to keep it dry.
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Pictures for reference?
Perhaps you could bolt or epoxy a small piece of nylon cutting board to the bottom, then rescrew the sliders back on?
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On the 1900, they weren’t crackhead the molding in nuts did pull out. I replaced them with nut-serts and had it three number 12 wood screws to the front and the back of the plywood that mounted to the bases. It held up all last year.
I think my next step would be to use a high density foam and try to have something molded into it with the fasteners attached. Old red used some high density foam that was different than the type of stuff we buy at express composites, maybe something like that.
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I suppose pictures would help, but I repair a fair amount of plastics on cars/trucks and I use a tool that heats up metal "Stitches" that are applied into the plastic across the breaks. Before I bought the actual tool, I'd buy the stitches, hold with needle nose pliers, and heat them with a torch, then dig them in while hot. After a few, you get a good idea how much heat to add for your particular project. There are adhesives that might work, but I've not worked with any that held up structurally speaking.
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Here are some pictures of a seat undressed from the cvx18 I am redoing
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Seat bottoms are cracked but not broken.
If I was going to stuff the void full of chopped glass and resin, so a bolt through from the top would not collapse the empty space inside, which kind of resin would use to adhere to the plastic? (at least as good as it could)? Epoxy, polyester, Vinyl?
(http://employees.casinotrac.com/seatbottomredline.jpg)
(http://employees.casinotrac.com/seatbottom.jpg)
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Express Composites explained the many ways that it was a horrible idea to try and fill/strengthen the void that way. Now trying to formulate plan C.
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Unfortunately when plastics age, they get brittle. I'd still consider "stitches" as a last resort. Maybe even add some aluminum strap to help spread the loading and flexing? What about a product like Seacast, just embed some all thread couplers with short carriage bolts on the inside to hold them from pulling out. Just use some tape to hold and seal the cracks till the stuff hardens. Not going to get much to stick to it, but if it forms inside and spreads the load it might save the bases.
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Solid Repair. Added 1/4" alum plates bedded in 5200 marine adhesive and screwed to bottoms. Then 5/16" rounded top carriage bolts with 2" fender washers through the seat, and through the plates. Added new sliders.
(http://employees.casinotrac.com/quaterplates.jpg)
Now they are rock solid.
(http://employees.casinotrac.com/solidseats.jpg)
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Can I add this to " Vendor and Repair Resources " thread ?
EDIT ...
Added
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Looks great and well engineered. Hope mine hold up. I used just fiberglass cloth and spar varnish on the front and back seats in 2013. So far so good.
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I’m always late to the party, but the 1987 seats are the only ones that are still produced and available. I’ve seen them for sale as the shell only, or complete. I bought a pair when I redid the interior of my previous 86 CVX-18.
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Do you recall the manufacturer or distributer? Or website?
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I might have typed 87, I meant the 88 seats. Yep. Scotties Canvas in FL. They have a website, but it's been updated and doesn't show all the inventory. This is my old boat, it's had 1 or two owners since me. Looks like they're holding up well. The only thing I did special other than the pattern was to have them cover it in the same material as my local guy doing the rest of the interior and to have the headrest up slightly higher to match the original Glastron seats. I sent them a couple pictures for reference.
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Yes, 88. They look great. I'm hoping the "Fix" will last, but nice to have a backup position.
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Some found on Google search …
Custom Captains High Back Recliner Boat Seat
http://www.restorepontoon.com/pontoon/pc/viewPrd.asp?idproduct=379 (http://www.restorepontoon.com/pontoon/pc/viewPrd.asp?idproduct=379)
Talon High Back Bucket Seat 3013
http://www.restorepontoon.com/pontoon/pc/viewPrd.asp?idproduct=3075&idcategory=155 (http://www.restorepontoon.com/pontoon/pc/viewPrd.asp?idproduct=3075&idcategory=155)
Wise Weekender Series Fish N Ski Boat High-Back Bucket Seat
https://www.overtons.com/product/details?pdesc=Wise-Weekender-Series-Fish-N-Ski-Boat-High-Back-Bucket-Seat&i=300660 (https://www.overtons.com/product/details?pdesc=Wise-Weekender-Series-Fish-N-Ski-Boat-High-Back-Bucket-Seat&i=300660)
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Could you cut the bottom of the plastic seat out. Add some aluminum for reinforcement and fill with expandable foam. After that plastic weld the bottom back on. I used to fix all kinds of plastic bumpers on cars. There are a lot of products out there. Have you tried just plastic welding all the cracks? Harbor Freight sells a cheap kit otherwise buy a cheap wood burner or solder gun, will do the same.