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What catalyst and thinner for Spectrum Gel Coat

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  • What catalyst and thinner for Spectrum Gel Coat

    What catalyst should I use for Spectrum Color Tige, 2007-2009, Frost VAL Color Boat Gel Coat?

    I will be refinishing my swim platform on a 2008 Tige 22ve. I will be using a foam roller with several light coats until it is even. Then I will be using Gator step over top. Very little gel coat will be showing. I am not expecting show quality. After 11 years it needs to be refreshed.

    Also what should I use to thin it will to provide good fluid application? I don't have the ability to spray it.

    Thank you

  • #2
    So I don't do gelcoat but everyone will tell you to read the back of the can for exactly what the mfg uses. Go outside that then too bad. Or call them.

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    • #3
      Yes, RTL . . . but often it is Styrene (nasty stuff) that is the thinner. . . OR . . . some folks like to use Duratec High Gloss additive as a thinner and gloss enhancer.
      Best regards, Ted . . . . Cape Cod, MA

      Current Boats: Formula 330 Sun Sport, O'Day Mariner Sail #3224, Sunfish
      Past Boats: Catalina 22 Sail #10531, Formula 242 Sun Sport
      Twin Mercruiser 7.4 LX MPI (0F802036, 039), Bravo 3's (0F806198, 199), Mercury 7.5 HP (1969), Johnson 4.5 HP (1980)

      My Boating Web Pages: http://www.tpenfield.com

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      • #4
        cant say enough good about Duratec 904.....
        Cheesehead boating the Gulf Coast of FLA 27.51° N, 82.53° W

        1988 Cruisers Rogue 2420 -VP 290 DP now powered by custom 468 - https://forums.iboats.com/forum/owner...988-rogue-2420

        Past Boats
        1970 Wooster Hellion - Merc 9.8
        2002 SeaRay 190BR - 5.0 - A1G2 - "Cheeseheads in Paradise"
        1984 Avanti 170DLI -3.0 stringer- "Ship Happens"

        What’s behind you doesn’t matter.Enzo Ferrari

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        • #5
          Agree with Scott, its the only thing I will ever use for my last layer of gelcoat from now on... No wax needed and makes it flow like water.

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          • #6
            On a side note . . . one challenge (IMO) when working with gelcoat is the time that it takes to 'gel'/harden can be fairly quick . . . . 15 minutes ( )

            Cooling the gelcoat can help, but I'm wondering if there are any other 'tricks'/additives to share with the OP ?
            Best regards, Ted . . . . Cape Cod, MA

            Current Boats: Formula 330 Sun Sport, O'Day Mariner Sail #3224, Sunfish
            Past Boats: Catalina 22 Sail #10531, Formula 242 Sun Sport
            Twin Mercruiser 7.4 LX MPI (0F802036, 039), Bravo 3's (0F806198, 199), Mercury 7.5 HP (1969), Johnson 4.5 HP (1980)

            My Boating Web Pages: http://www.tpenfield.com

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            • #7
              Sign up today
              Spectrum makes great color match gel coat. Unfortunately I had to buy a gallon for the few ounces I needed. I used my HVLP to patch some guffs and channel marker collision aftermath.

              Per there tech guy:
              Catalyst: Orca Composites MEKP #0811. A little dab will do ya, so research on the ratios.
              Spectrum Patchaid for color.....probably not necessary for a roller application. Essentially a spray thinner.
              Surfacing wax: Fiberlay Surface Seal #6324. You'll need this or something like the Duratec mentioned above. Sounds like it will also allow better self leveling.

              Gel coat will not hard cure in air, so you will need some additive (surfacing wax or Duratec) to block the air and let it hard surface for sanding.
              '96 Larson 174 SEI BR. 4.3LX 4 bbl Weber s/n 0F786604. Alpha One Gen II s/n 0F709315

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