RR Hotcoat advise wanted

General Discussion
1

Hi all ,

How to do a RR hotcoat without sanding the surface?

Any TIME, TEMPERATURE and HUMIDITY indications very much welcome…

When can one flip the laminated board over to do the other side? When it is gelled? Or more like when it is in the state after gelling? (any name for that state?)

Thanks for epoxy adises…

Wouter

2

Hey check this link from the other day…its for glossing, but same difference, its pretty hard to do a coat without sanding unless EVERYTHING is perfectly clean…so good luck. The flip time depends on what kind of hardener you have (i.e. fast slow) ANd all of that information is in the Epoxy primer by greg, or on the RR website.

3

hotcoat about an hour or so after lam…while it’s still a bit tacky. the end.

4

Hello Wouter ,

I’m not an epoxy pro but I glassed two boards this week with Resin Research epoxy resin. It’s still a big experiment and the boards have not been sanded yet or been surfed and thrashed yet. I don’t know if they will be awesome or fall apart… I’m updating as we go.

http://www.swaylocks.com/forum/gforum.cgi?do=post_view_flat;post=258114;page=2;sb=post_latest_reply;so=ASC;mh=25;

So far I’m happy with the results. The longest I waited between lam and hot coat was 24 hours. It’s been hot in So. Cal.

I did not sand or wipe the boards down with denatured alcohol in between coats. I did not touch anything with bare hands.

I printed out that Epoxy construction Primer and read it a few times before starting.

Go for it !

Ray

5

THANKS FOR THE REPLIES? ILL POST WHEN DONE WITH HOTCOAT IN SEPTEMBER

6

Falling temperature or heat your board up before

warm up your epoxy

try not to mix to vigorously so as not to add any bubbles

use add f

post cure before sanding

surf

surf

surf

Christian

7
Quote:

Falling temperature or heat your board up before : USE FALLING TEMPERATURE OR AVOID IT??

warm up your epoxy : WHAT TEMP DO YOU ADVISE???

try not to mix to vigorously so as not to add any bubbles GOOD ONE !!!

use add f YES

post cure before sanding HOW LONG???

surf YES

surf OH YES

surf MMMMMMMMMMM

Christian THANK YOU

8

Hotcoats will not stick as well to your lam if:

  • You wait too long. Best to hotcoat a fresh lam, like just after "B stage"
  • Do not remove blushing if you did wait too long. Use alcohol wipe down.
  • Air temp drops too low. Best to do the entire job at 80F.
Note that this winter we had issues if a lamination was allowed to set overnight at a temp of 60F, then

warmed the room back up to 80F the next day. We found it best to never let a board temp to never

drop below 80F at any time during the “wet work” as strength and layer bonding was impaired.

We’ve found the noticibly stronger boards we’ve done were made in one session:

(seal blank, lam bottom, lam deck, hotcoat deck, then post cure in ‘oven’ 110F for 4 hours).

This was good for production times, since we have been able to seal, lam both sides, and hotcoat

in about 1.5 hours.

It really helps to exploit the B Stage.

9

bump