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Old 04-26-2018, 08:10 AM
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Default Silicone & Toulene Mix

Grimm mentioned in his peninsula build that he mixed around 2 parts silicone 1 part toulene 1-1.5 parts peat. May i know how do you even measure them for mixture. Also how big a portion do i mix before applying?
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Old 04-26-2018, 06:27 PM
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Default Re: Silicone & Toulene Mix

Greetings,

The toluene is just a solvent for the silicone - to take it from being a non-flowing gel into more of a paintable/spreadable liquid. You can also mineral spirits instead, FYI. More toluene means a thinner, more liquid mixture. Less toluene means a thicker syrup or jelly-like mixture.

Squirt half a tube of silicone into a glass or metal container (or a solvent-proof plastic container) and add a few tablespoons of toluene/spirits. Mix with a paint stirrer and add more solvent until the silicone is as thin as you want and then add the peat. Note: The peat will re-thicken the mixture so you may need to add more solvent to get everything to the right consistency for your application.

You will need to give the viv a week or more for the solvent vapors to fully offgas. This depends on how thickly you apply the silicone/peat and how much solvent you mixed in. You'll want to let this happen outside rather than spending a week breathing-in all the toluene you mixed into the silicone.
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Old 04-27-2018, 03:46 AM
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Default Re: Silicone & Toulene Mix

Hi Kimcmich,

Thanks for your advice. Also may i know how much time do i have for application of the mixture onto the bg?
Have you tried using the mixture? Are the results good?
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Old 04-27-2018, 04:30 AM
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Default Re: Silicone & Toulene Mix

Greetings,

The solvent does not prevent the silicone from curing once it is exposed to air but you should have 20-30 min to work with it.

I have not tried Grimm's recipe (I've thinned silicone for painting on the inside of terracotta pots to make them more water-retaining).
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Old 04-27-2018, 04:50 AM
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Default Re: Silicone & Toulene Mix

You mixed it with peat as well?
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Old 04-29-2018, 02:18 AM
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Default Re: Silicone & Toulene Mix

I was / am pretty happy with the results of thinned silicon and peat.

The observations I'll make about the process are these:

-you'll want the wet the peat with water before adding the solvent, otherwise the peat is going suck LOTS and LOTS of the solvent

-absolutely do not do it indoors

-it's going to take at least a week for it to dry (and the solvent odors dissipate enough to move it inside) . . . it smells

-don't make the layer(s) too thick, it'll take longer to dry (and move inside)

-you will miss spots, it's not that big of a deal to add additional layers of "goo" on top of older layers. The solvent will partially "melt" the old silicon so that that's a good bond in between the layer (and the physical fibers help with that as well)

-be careful about adding thinned silicon on top of the siliconed seams of glass tanks . . . the solvent will eat into the old silicon
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Old 05-05-2018, 03:44 PM
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Default Re: Silicone & Toulene Mix

I also mix Toluene with my silcone. I find it much easier to work with and seems to spread farther. One difference is that I don't mix the peat with the silicone mix. I work in small areas, maybe 6" x 6", and press the peat or cocofiber into the mix by hand.
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Old 05-18-2018, 07:20 PM
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Default Re: Silicone & Toulene Mix

Good stuff! I'm going to give this a try. Thank you!
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