Cleaning silnylon

Discussion in 'Gear Chat' started by slovhike, Jul 16, 2019.

  1. slovhike

    slovhike Thru Hiker

    Hello,
    any tips how to clean silnylon. Not sure what the stain is from. Probably tree sap.
    Also is it possible to remove the silicone that was used to seam seal it and do the seam sealing again...
    upload_2019-7-16_14-54-31.png

    upload_2019-7-16_14-56-57.png

    Thanks
  2. Chiseller

    Chiseller Thru Hiker

    Re sap...
    I had the same problem a couple of months back. I used Luke warm soapy water and a very gentle wipe with a soft cloth.
    Worked for me and my shelter was covered in it.
    Next time I think that I would soak the shelter first, then erect it wet, then wipe with soapy water.
    I'm thinking that it would be less likely to damage the sil as the sap wouldn't spread and the absorbed water would help repel it as it was being wiped?

    Hope it works for you.
    When I googled it, there were many more extreme solutions... I'm just glad soap and water worked for us :whistling:
  3. Fossil Bluff

    Fossil Bluff Ultralighter

    Bob at Backpackinglight use white spirit to clean up fresh overspill of silicon when applying it. I did too to no ill effect.

    Maybe worth your while contacting him and asking his opinion - or the distributor of your product???

    Anyway here’s his video - you’ll see him wiping the fly sheet with white spirit.

    *I’m not endorsing this, just sharing what I’ve seen and done.

  4. Teepee

    Teepee Thru Hiker

    Lots of things take sap off of Sil....baby wipes, alcohol, mayonnaise, turps etc.

    However, time does it too. It goes brittle and falls off.

    You definitely cant remove sil sealant with solvent, or it would remove the sil from the fabric too. There are silicone digesters, which would destroy the fabrics coating.

    The rule of thumb with silicone removal is mechanical...often, something 'grippy', like a finger or a damp microfibre works best. If it won't come off, it generally doesn't need to anyway. Silicone can be overcoated with silicone quite happily.
    Last edited: Jul 17, 2019
    tom and Fossil Bluff like this.
  5. PhilHo

    PhilHo Thru Hiker

    I agree with @Teepee add some more sealant on top but this time thin it more and wipe off the excess. You are only trying to get the sealant to block up the hole around the thread made by the sewing needle and for it to soak into the thread if it isn't already waterproof. The smear on the top is a complete waste except it might save the thread from being rubbed and potentially weakened.

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