Topic

Using Permatex – to thin or not?

Viewing 5 posts - 1 through 5 (of 5 total)
David N BPL Member
PostedJun 27, 2025 at 4:48 am

I’ve bought some Permatex Windshield & Glass sealant to seam seal a tent.  I read that it’s thinner than a typical seam sealer.  However, it’s still fairly thick, and nowhere near as runny as the ‘warm honey’ consistency that some folks recommend thinning regular seam sealer to.

 

Is it a good idea to try thinning the Permatex (using white spirit?) or is it best to use it as it comes out of the tube?

Greg Pehrson BPL Member
PostedJun 27, 2025 at 5:16 am

Is it the version that says “Flowable Silicone” on the tube? That’s the one you can use without thinning.

David N BPL Member
PostedJun 27, 2025 at 5:24 am

Yes, it does say “Flowable silicone” (Part Number 81730).  It’s just a bit thicker than I expected, so I was wondering if thinning it would help it get into the stitching, but perhaps, with “flowable” in the name, it doesn’t need any further thinning.

Greg Pehrson BPL Member
PostedJun 27, 2025 at 7:18 am

Yes, I’ve sealed multiple shelters with Permatex Flowable right out of the tube and gotten great, long-lasting results; just hold the tube perpendicular to the seams and squeeze lightly, and you’ll leave behind a thin film the width of the tube (don’t use the screw on applicator tip). Then run your finger down the seam to work it in, and have a damp paper towel nearby to clean off your finger after each seam. You can practice the technique with a tube of toothpaste against the back of your hand.

Brad Rogers BPL Member
PostedJun 27, 2025 at 1:37 pm

I have used it both ways – I actually prefer thinning it, but then you might as well buy silicone caulk and use that as a starting point.

Viewing 5 posts - 1 through 5 (of 5 total)
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