Forums > Stand Up Paddle General

Cocomat repair

Reply
Created by knot board Two weeks ago, 4 Oct 2021
knot board
QLD, 1230 posts
4 Oct 2021 7:25AM
Thumbs Up

The top layer of resin peeled off my cocomat board from being left in the sun.

I have been getting fibreglass rash from carrying the board so I've sanded the top layer off.

Do I recoat it epoxy or polyester resin?

Thanks









riverider
TAS, 1035 posts
4 Oct 2021 1:15PM
Thumbs Up

Epoxy

colas
4382 posts
4 Oct 2021 3:38PM
Thumbs Up

Epoxy:
- epoxy has natural glueing properties (unlike polyester), so it will stick well to the deck. Your top layer may have been polyester to peel off so easily.
- epoxy has some flex, so it will flex under pressure rather than shatter like polyester

On the other hand, polyester is shinier, harder and more scratch resistant (e.g. to sand abrasion), this is why a lot of epoxy boards have actually a polyester hotcoat.

knot board
QLD, 1230 posts
4 Oct 2021 6:14PM
Thumbs Up

Epoxy it is then!
Thanks

Helmy
VIC, 775 posts
5 Oct 2021 11:40AM
Thumbs Up

I'll send you a tub of epoxy.
You send me that 12 6 Naish

Mark _australia
WA, 20655 posts
5 Oct 2021 3:58PM
Thumbs Up

UV stable epoxy. Kinetix 104 best, I know its a perfect match for the cocomat clear

Given your location and not needing much, Bote Cote UV stabilised might be best as they will sell small qty's

IFocus
WA, 531 posts
5 Oct 2021 7:58PM
Thumbs Up

Select to expand quote
Mark _australia said..
UV stable epoxy. Kinetix 104 best, I know its a perfect match for the cocomat clear

Given your location and not needing much, Bote Cote UV stabilised might be best as they will sell small qty's




Mark how does Bote Cote flow is it thick or thin-esh?

And can you buy Kinetix over the counter here in WA?

I am doing paulownia over EPS and looking to laminate in 2oz glass

Mark _australia
WA, 20655 posts
6 Oct 2021 9:18AM
Thumbs Up

Bote Cote is a litttlle thicker but not much in it. Kinetix at Fibreglass and Resin Sales
I pick the latter as its a surf industry standard, nothing wrong with Bote Cote but I'm trying to exact matches on clearness level for repairs
But only mentioned Bote Cote as they're in Qld and will sell a 150ml kit so might suit the OP better

IFocus
WA, 531 posts
6 Oct 2021 11:38AM
Thumbs Up

Select to expand quote
Mark _australia said..
Bote Cote is a litttlle thicker but not much in it. Kinetix at Fibreglass and Resin Sales
I pick the latter as its a surf industry standard, nothing wrong with Bote Cote but I'm trying to exact matches on clearness level for repairs
But only mentioned Bote Cote as they're in Qld and will sell a 150ml kit so might suit the OP better


Hmm don't know how I missed Kinetix at F&RS (slaps forehead)

I got some Pro-Lam from Composites Warehouse (told it flows a bit better) a while ago with the plan of a final coat of 2 pack automotive for UV protection.

Waiting on fibreglass so haven't used yet to confirm.

Will definitely give the Kinetix a go after I use up the Pro-Lam.

Thanks Mark really appreciate the advice.

knot board
QLD, 1230 posts
8 Oct 2021 2:49PM
Thumbs Up

Select to expand quote
Mark _australia said..
Bote Cote is a litttlle thicker but not much in it. Kinetix at Fibreglass and Resin Sales
I pick the latter as its a surf industry standard, nothing wrong with Bote Cote but I'm trying to exact matches on clearness level for repairs
But only mentioned Bote Cote as they're in Qld and will sell a 150ml kit so might suit the OP better


Is this kit you were thinking best for me to purchase mate?

boatcraft.com.au/Shop/index.php?main_page=product_info&cPath=15&products_id=152

Mark _australia
WA, 20655 posts
8 Oct 2021 1:47PM
Thumbs Up

Yep
but for sample kit you have to specify non yellowing hardener.
It won't be as clear as surf resins too, but might be OK over coco.

But its the only way to get small qty of epoxy that I know of....

knot board
QLD, 1230 posts
Tuesday , 12 Oct 2021 7:16AM
Thumbs Up

Select to expand quote
Mark _australia said..
Yep
but for sample kit you have to specify non yellowing hardener.
It won't be as clear as surf resins too, but might be OK over coco.

But its the only way to get small qty of epoxy that I know of....


Ordered, thanks.

What's the application method to get a nice finish, just a cheap paintbrush?

Mark _australia
WA, 20655 posts
Tuesday , 12 Oct 2021 9:38AM
Thumbs Up

Sand and wash with water only
yup cheap varnish brush
second coat when it's almost hard will fil any fisheyes you might have and it's always worth that second coat to get some thickness and make your sanding easier

wet sand with 180 and a block to blend edges into deck then flatten the whole area
wet sand 240 and 400

thsts normally sufficient but if it stands out a squirt with satin clear might help

knot board
QLD, 1230 posts
Monday , 18 Oct 2021 7:28AM
Thumbs Up

Select to expand quote
Mark _australia said..
Sand and wash with water only
yup cheap varnish brush
second coat when it's almost hard will fil any fisheyes you might have and it's always worth that second coat to get some thickness and make your sanding easier

wet sand with 180 and a block to blend edges into deck then flatten the whole area
wet sand 240 and 400

thsts normally sufficient but if it stands out a squirt with satin clear might help


The pack has arrived and it also includes a bottle of two pack water based polyurethane top cote - do I need to use this?

IFocus
WA, 531 posts
Monday , 18 Oct 2021 6:59AM
Thumbs Up

Select to expand quote
knot board said..

Mark _australia said..
Sand and wash with water only
yup cheap varnish brush
second coat when it's almost hard will fil any fisheyes you might have and it's always worth that second coat to get some thickness and make your sanding easier

wet sand with 180 and a block to blend edges into deck then flatten the whole area
wet sand 240 and 400

thsts normally sufficient but if it stands out a squirt with satin clear might help



The pack has arrived and it also includes a bottle of two pack water based polyurethane top cote - do I need to use this?




Mark is that for UV protection?

Mark _australia
WA, 20655 posts
Monday , 18 Oct 2021 9:08PM
Thumbs Up

ewwwwww anything water based will be sh!t
no need to top coat over an actual uv stabilised epoxy

colas
4382 posts
Monday , 18 Oct 2021 9:57PM
Thumbs Up

Select to expand quote
Mark _australia said..
ewwwwww anything water based will be sh!t
no need to top coat over an actual uv stabilised epoxy


+1

I tried water-based varnish once on a board, good quality for use in bathrooms. It was a disaster. It whitened and peeled away.

You need an UV-proof vanish on top of paint, not on top of UV-proof epoxy... that you can use as a varnish.



Subscribe
Reply

Forums > Stand Up Paddle General


"Cocomat repair" started by knot board