100 Pcs Silicone Self Healing Adhesive Injection Ports for Mushroom Spawn Bags and Mason Jar Lids, Dia. 20mm Solid Seal Injection Ports for Grain Bags

Work as described.wish had a little pull spot so easier when wearing gloves but still work well

Good adhesion. Work perfectly.

For me the adhesive survived a 3 hour pressure cook but does need a stronger bond. The complete failure for this product is that I believe they designer intended a 30ga needle rather than the 14-16ga needed for mushroom cultivation. That being said the user will just put gaping holes straight through this product. Sadly a complete waste of money and total failure.

I do not see what other peoples issue with these (why put them on before pressure cooking, its an adhesive....are you trying to waste money)Like I said, no issue with this product....I just screw a 90mm long 20 micron filter on a mason jar and rubber band(heat resistant rubber/silicone) a piece of foil on top to keep out excess moisture when pressure cooking. Then when its time for the injection, I take one of the self seal adhesives on and inject the mycelium.Great value if u ask me

These don’t stick very well and fall off often

I’ve had problems with them staying on. The adhesive doesn’t always work well. I’ve had a few fall off my bags from injecting at an angle.

I can't get these to stick onto my bags and the hole I made while injecting mycelium does not close.

They don't heal or stick junk trash I can't send them back because I waited to use them untill now SMH