Silvertip epoxy—no post cure?

Discussion in 'Materials' started by Nomiddlename, Jan 29, 2025.

Tags:
  1. Nomiddlename
    Joined: Dec 2024
    Posts: 57
    Likes: 10, Points: 8
    Location: Kelowna, Canada

    Nomiddlename Junior Member

    I need advice building a small stitch and glue boat. I have sheathed, coated, faired and recoated the outside of my hull using silvertip epoxy from system three. I know that they say it is print through resistant, but the warmest I can keep my shed ATM is around 60f or 15c at mid day. Does anyone have enough experience to know whether I will suffer bad print through curing in these temps? I brought in a propane heater and carbon monoxide detector, but really wasn't comfortable with it. Maybe the one I got was a little over kill. Is post curing still recommended with silvertip?
     
  2. Tops
    Joined: Aug 2021
    Posts: 367
    Likes: 106, Points: 43
    Location: Minnesota

    Tops Senior Member

    I have never worried myself over print through with epoxy resin, with the lack of gelcoat, solvents, and slower pace of lamination.
    Has the boat seen the Silvertip TDS recommendation of 3 days at 70F/21C for a normal final cure?
    One brand of epoxy I used said that 60F/15C will halt the cure of (their) epoxy, and it seems your boat may have spent days and nights at or below this temp.
    This is worth reaching out to Silvertip for specific advice including any times and temps for post cure.
     
  3. Nomiddlename
    Joined: Dec 2024
    Posts: 57
    Likes: 10, Points: 8
    Location: Kelowna, Canada

    Nomiddlename Junior Member

    Thanks for the reply. Silvertip maintains their epoxy will continue to cure at 2c. I suppose the question is how long will that take haha. Might have to change shops just to be safe. At least just for final sand and paint on outside hull.
    Interesting that print through hasn't been a concern for you. I also have not experienced it but I have only done glasswork in the summer with temps in high thirties, low forties prior to this build.
     
  4. BlueBell
    Joined: May 2017
    Posts: 3,036
    Likes: 1,133, Points: 113
    Location: Victoria BC Canada

    BlueBell . . . _ _ _ . . . _ _ _

    If it's a detached shed, why are you worried about CO?
    Run the heater, then ventilate before you go in.
     
    Nomiddlename likes this.
  5. Nomiddlename
    Joined: Dec 2024
    Posts: 57
    Likes: 10, Points: 8
    Location: Kelowna, Canada

    Nomiddlename Junior Member

    Just my inexperience with propane heaters that gives me pause I guess. Since it's at my friend's detached shed one block from my house I'm just using an abundance of caution. Might just scale down from a 60,000 btu forced air unit to 15,000 radiant. I fired up the 60,000 btu unit on low and wow. That was hot.
     
  6. BlueBell
    Joined: May 2017
    Posts: 3,036
    Likes: 1,133, Points: 113
    Location: Victoria BC Canada

    BlueBell . . . _ _ _ . . . _ _ _

    Good call.

    That's still 4400 watts of radiant heat!
    A fan would be helpful.
     
  7. comfisherman
    Joined: Apr 2009
    Posts: 884
    Likes: 451, Points: 63, Legacy Rep: 10
    Location: Alaska

    comfisherman Senior Member

    I don't have any technical knowledge, but spent the moring laying up some panels in a tyvek tent. It's 9f right now and we're running vent fans behind tube style diesel heaters to get it warm enough... and today it's not getting it done.

    Old joke was put on 1970s era Ted nugent and when catch scratch fever starts to make sense.... you need to get outta the tent and find some oxygen....

    Northern hemisphere winter project problems... I feel your pain.
     
    Last edited: Jan 29, 2025
    Nomiddlename and DogCavalry like this.

  8. Nomiddlename
    Joined: Dec 2024
    Posts: 57
    Likes: 10, Points: 8
    Location: Kelowna, Canada

    Nomiddlename Junior Member

    Hahahha.
     
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.