DIY Seam Grip

[CantWhistle]

Is it possible to make a homemade polyurethane sealant like Seam Grip with polyurethane caulking and mineral spirits similar to the method of making flow able silicone for silnylon fabrics? I have some 70d and 300d PU coated fabrics I'd like to seal.

[mountain_man_mike]

I've thinned out pure silicon (clear) with mineral oil and brushed it on, much like seam sealer. It works great, very affordable and has lasted 7+ years.

[GadgetUK437]

I've thinned out pure silicon (clear) with mineral oil and brushed it on, much like seam sealer. It works great, very affordable and has lasted 7+ years.

But I see you are using a silnylon tarp, not a PU coated one?

[sonicview1]

mineral oil can anyone tell me what mineral oil in England is,to dilute clear silicone,using on sylnylon
any ideas

[GadgetUK437]

White spirit.
You'll be asking what Spackle is next! LoL

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Gadget

[Tacblades]

For PU i use Marine Goop, it PU adhesive, very strong, good price and is UV protected

[Firesong]

The marine goop will still turn an off dirty beige in the sun eventually. I use it for other things. Good product.

[sonicview1]

lets walk before running with these fancy words i have just recoverd from the sewing machine, and i have to go back on the thing to finishing my tarp, should take a leaf out of Shugs video just buy one and save my time

[mountain_man_mike]

But I see you are using a silnylon tarp, not a PU coated one?

You are right and I don't know if the properties of PU v. Silnyloncause a failure.

[GadgetUK437]

Silicone sealant tends to peel off PU coated materials.

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Gadget