41 replies to this topic

[night_ryder]

can i use any type of silicone sealent as a self healing port?

im going to be using the last of my syringe in two(only have .75 left) so i need the self healing port, and maybe tyvek paper

do all cd cases use tyvek?, i think i read this somewhere. how do i know if its tyvek

[loochypooch]

can i use any type of silicone sealent as a self healing port?

im going to be using the last of my syringe in two(only have .75 left) so i need the self healing port, and maybe tyvek paper

do all cd cases use tyvek?, i think i read this somewhere. how do i know if its tyvek

Maybe try injecting the .75cc into a liquid culture for the most bang. Anyways tyvek is what postal envelopes are made of, the white ones that look like compressed fiber paper that is really strong and doesn't rip.

[Hippie3]

get silicon adhesive at the auto parts store,
it can take the heat.

dunno about cd cases,
but if you can't find tyvek envelopes at post office
try polyfil [pillow stuffing]

[night_ryder]

1.so not all silicone adhesive can take the heat

2.i should inject the rest i have into 1 lc

3.if i was to use tyvek, could i shake it around

4.tyvek doesn't rip-so i should look for an unripperable postal envelope then

[BuckarooBanzai]

1. Any high silicone adhesive can take the heat, but not all silicone adhesives are both "sticky" enough to stay on the lid and "soft" enough to self heal after injecting. Goop, for instance, is a bad choice.

2. Make an a LC in the biggest canning jar you have. Only fill it 2/3 full. Sterilize it and then inject only half your remaining spore solution. .75 mL should contain a LOT of microscopic spores.

3. If you do a double tyvek layer with some kind of spacer so the pieces don't touch, you can shake to your heart's content (sheet metal washers make good spacers). If you use polyfill, don't shake (swirl gently), you don't want to get the polyfill wet.

4. If you get the Post Office envelopes (or CD covers) that have long visible fibers and can't be ripped (they just stretch), you have tyvek. The PO calls these "Priority Mailing" envelopes and there should be a big stack of them at the supply counter of your local PO.


Here are two lids with four silicone injector ports. The lid on the right needs another layer of tyvek, it was left off to show the washer. The underside of each lid has another washer and layer of tyvek (two washers, two layers of tyvek):



Underside pic (again, needs it's tyvek attached):



The attached thumbnail is a topside closeup. Hope this helps!

Much more complete writeup:
http://mycotopia.net...ead.php?t=10067

[night_ryder]

would a silicone sealent described as "durible" or "flexible" do the job-stick to the surface and close after injected

there are different type, such as for "bath rooms" for "windows" and "all purpose"

there are others but what should i look for in regards to it being suitable

[night_ryder]

should i just look for one with the same properties are the sealent you used?

[Hippie3]

bucky uses the caulk but i prefer the adhesive.
it's transparent, making hiting the hole a bit easier
plus it sticks better
plus it can take higher temps.
RTV brand silicon adhesive at auto supply store.
go.
now.
;)

[Spark]

You can even use earplugs as self healing injection ports.

[night_ryder]

i want to stick with silicone as it seems simplier or at least to me it does

[Hippie3]

it is.
the ear plugs are hard to keep in position, i hear.
:lol:

[loochypooch]

it is.
the ear plugs are hard to keep in position, i hear.
:lol:

Whadya say? What?

:teeth:

[night_ryder]

what properties of silicone sealent should i look for? give me some basics so i can at least make a informed decision

[Spark]

You'll need to use silicone or some type of adhesive/glue to keep it in place.

[ignorant monkey]

what properties of silicone sealent should i look for? give me some basics so i can at least make a informed decision

hippie has already given you the basics pretty much. man. a silicon that is clear and can withstand higher temperatures is best

[night_ryder]

none of the slilicones specifically say resistent to high heat.

so what other things or should i get a upvc type silicone sealent or one for doors

[BuckarooBanzai]

I use GE Silicone II clear caulk. You can get it virtually anywhere (even WalMart and K-Mart have it). It is used extensively in bathrooms and window installations.

Hippie uses RTV brand silicone adhesive. You can get it virtually anywhere, as well. I'm not certain what it's primary use is, but I've seen it in a ton of auto parts stores.

If you want to choose a brand different from one of those, you need to go to the store and carefully examine the labels of the products you can choose from. If the label doesn't indicate a maximum usable temperature, write down the brand names and look the info up on the web. I would suggest looking for MSDS (Material Safety Data Sheets). Google can help you here.

The temp range for Silicone II is -75F to +400F, so it is fine in the pressure cooker. Virtually any Silicone based product is going to survive the temps. You won't know how flexible it is going to be, though, until you squirt some out and test it. Goop, for instance, is thin and dries kind of hard. It takes multiple applications to get a thick glob and it is not very good at self healing. You want something that says on the label that it stays flexible after curing.

I would highly recommend searching out one of the two specificly mentioned (and extensively tested) brands already mentioned, but to each his own.

If you find something new that works great, please let us know...

[night_ryder]

are all rtv brands the same? or do these differer aswell

[encapsulated]

Hey buckaroo does that silicone you used have to be applied in a large bead?i just made a couple before I read this with the exact same stuff and they are decent size blobs but not huge will it still be ok?

[night_ryder]

are all rtv brands the same? or do these differer aswell

anyone?