Self-healing injection sites for grow bags

mushmonkey · 10-20-09, 12:17

What is a good product to use on poly grow bags for self-healing injections/inoculations?

I have tried several kinds brands of silicone (RTV and non-RTV) and each one is really easy to just peel off the poly bags. These glues all work great when creating self-healing injection sites for jars, mostly because the glue is on both sides of the lid.

I use 6 mil poly bags with filter patches.

zodd · 10-20-09, 12:27

you want to tape over the silicone after it sets.

usually when applying silicone to plastic containers ive found that it just doesn’t want to stick either because of the warping that the heat does while ,or because of the smoothness of the surface. what i do with plastic jars is braise the surface with sandpaper then apply the silicone. then smudge the silicone so it has a wider surface of contact then pull it all back so there is nice big nipple in the middle where you are going to inject through. but you don’t want to be using sand paper on them bags so just use the tape. it works trust me

silicone should be roughly a centimetre thick so as to provide the re sealing effect you desire.

allso aquarium silicone is the best in my experience so far

mushmonkey · 10-20-09, 12:33

Quote:

Originally Posted by zodd

you want to tape over the silicone after it sets. usually when applying silicone to plastic containers ive found that it just doesn’t want to stick either because of the warping that the heat does while pcing or because of the smoothness of the surface. what i do with plastic jars is braise the surface with sandpaper then apply the silicone. then smudge the silicone so it has a wider surface of contact then pull it all back so there is nice big nipple in the middle where you are going to inject through. silicone should be about a centimetre thick so as to provide the re sealing effect you desire.[/FONT][/COLOR]

Awesome! Sanding the plastic to scuff the surface is a great idea!

I'll also try taping the silicone after it cures.

Thank so much for the quick reply, Zodd.

zodd · 10-20-09, 12:39

no probs man. but you may be best just using tape and not sanding the bags. but if your going to sand them make sure to be very light with it. you don’t want to put holes in your bags. although there pretty thick so you may be fine

blackout · 10-20-09, 15:14

I just put silicone directly on the filter patch, but a tiny bit on first and work it into the fibres of the patch, then a bit more on top so it is thick and does not spread too much and block up the filter.

mushmonkey · 10-20-09, 16:14

Quote:

Originally Posted by blackout

I just put silicone directly on the filter patch, but a tiny bit on first and work it into the fibres of the patch, then a bit more on top so it is thick and does not spread too much and block up the filter.

@blackout: That sounds like a great idea. You've had no problems with contamination?

I forgot to mention that I keep the bag sealed from before the PC until the first harvest.

blackout · 10-21-09, 15:18

Quote:

Originally Posted by mushmonkey

You've had no problems with contamination?

No, well no problems due to putting silicone on the filters!

mushmonkey · 10-26-09, 11:56

I have now tried the post-PC silicone, cure, tape, inoculate, tape method to create a self-healing filter patch.

It was easy to see where the silicon bump was under the tape, when I had to inoculate. Also the pin-hole left in the tape made it super easy to place a small piece of tape over that.

Thanks for all of your suggestions!

zodd · 10-26-09, 12:50

hope things work out for you dude.

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10-20-09, 12:17	#1 (permalink)
mushmonkey i like cakes! Join Date: Oct 2009 Posts: 10	Self-healing injection sites for grow bags What is a good product to use on poly grow bags for self-healing injections/inoculations? I have tried several kinds brands of silicone (RTV and non-RTV) and each one is really easy to just peel off the poly bags. These glues all work great when creating self-healing injection sites for jars, mostly because the glue is on both sides of the lid. I use 6 mil poly bags with filter patches. __________________ "Failure is the tuition we pay for knowledge." - P. Stamets

10-20-09, 12:27	#2 (permalink)
zodd Maniacal Laughter Mwahaa! Join Date: Jan 2009 Posts: 584	you want to tape over the silicone after it sets. usually when applying silicone to plastic containers ive found that it just doesn’t want to stick either because of the warping that the heat does while ,or because of the smoothness of the surface. what i do with plastic jars is braise the surface with sandpaper then apply the silicone. then smudge the silicone so it has a wider surface of contact then pull it all back so there is nice big nipple in the middle where you are going to inject through. but you don’t want to be using sand paper on them bags so just use the tape. it works trust me silicone should be roughly a centimetre thick so as to provide the re sealing effect you desire. allso aquarium silicone is the best in my experience so far __________________ who would win between a monkey and a dog?

10-20-09, 12:39	#4 (permalink)
zodd Maniacal Laughter Mwahaa! Join Date: Jan 2009 Posts: 584	no probs man. but you may be best just using tape and not sanding the bags. but if your going to sand them make sure to be very light with it. you don’t want to put holes in your bags. although there pretty thick so you may be fine __________________ who would win between a monkey and a dog?

10-26-09, 11:56	#8 (permalink)
mushmonkey i like cakes! Join Date: Oct 2009 Posts: 10	I have now tried the post-PC silicone, cure, tape, inoculate, tape method to create a self-healing filter patch. It was easy to see where the silicon bump was under the tape, when I had to inoculate. Also the pin-hole left in the tape made it super easy to place a small piece of tape over that. Thanks for all of your suggestions! __________________ "Failure is the tuition we pay for knowledge." - P. Stamets

10-20-09, 15:14	#5 (permalink)
blackout Mycotopiate Join Date: Oct 1971 Posts: 307	I just put silicone directly on the filter patch, but a tiny bit on first and work it into the fibres of the patch, then a bit more on top so it is thick and does not spread too much and block up the filter.

10-26-09, 12:50	#9 (permalink)
zodd Maniacal Laughter Mwahaa! Join Date: Jan 2009 Posts: 584	hope things work out for you dude. __________________ who would win between a monkey and a dog?

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