do you have to apply on both sides of the seam or just one side? also if it's one side, is it the inside or outside? thanks!

Hello, Thank you for the question. For the best seal I would recommend applying to both sides. Apply one side allow it to dry and then apply the opposite side. Please let us know if we can further help in any way. Thank you, Justin J. HouseofScuba

How many tubes would be needed to seal a 2-person sil nylon tarp? It has a ridge seam and two "gable end" seams.

One tube should do the job, unless you really goop it on thick and heavy. I have been working on a rainfly for a 4-person tent. It has many seams so I had to get a second tube. A two-person, simple tarp should pose no problems to cover with a single tube, IMHO.

Will this work on an older tent to seal the seams?

Hello Buzz, This sealant is designed to seal up seams coated in silicone which occurs on most tents. I would double check that your tent has silicone treated seams but it most likely would work without any issues. Please let us know if we can further help in any way. Thank you, Joe P. HouseofScuba

Can I use this to adhere screen mesh to patch a 4 inch hole in the mesh portion of a lightweight tent?

I think it would work fine. Down side is that there is not as much surface area for the adhesive to bond to. I personally would hand stitch the patch to the screen and then go over the stitching and the overlapping portion (border) of the patch with the Seam Grip.

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Seam Grip SIL Silicone Sealant for Silnylon Tents and Tarps

Product ID: 3715878

Details

Brand
GEAR AID
Item Weight
1.92 ounces
Item dimensions L x W x H
4.88 x 1.05 x
Material
Silicone
Style
Sealant 1.5 Oz

💧100% waterproof & weatherproof

🧴Compact 1.5 oz tube

🧵Seals up to 24 ft seams

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€ 16.93

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Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛠️ Seal it, stretch it, forget it—ultimate waterproof confidence for your silnylon gear!

INVISIBLE SHIELD - Clear formula keeps your gear looking sleek while providing a permanent, waterproof barrier.
ALL WEATHER WARRIOR - Withstands extreme heat and cold, ensuring your tent or tarp stays dry no matter the forecast.
FLEXIBLE DURABLE BOND - Cures to an elastic seal that stretches with your fabric, never cracking or peeling under pressure.
VERSATILE OUTDOOR ESSENTIAL - Perfect for silnylon tents, backpacks, tarps, and rainwear—gear up and stay dry on every adventure.
SEAMLESS PROTECTION MAXIMUM COVERAGE - Seal up to 24 feet of silnylon seams with just one tube—ultralight gear’s best friend.

Gear Aid Seam Grip SIL is a 1.5 oz clear silicone sealant designed specifically for silicone-treated fabrics like silnylon tents and tarps. It creates a flexible, waterproof, and durable seal that covers up to 24 feet of seams, resisting extreme temperatures without peeling or cracking. Ideal for ultralight outdoor gear, it ensures long-lasting protection against water intrusion while maintaining fabric flexibility.

Specifications

ASIN	B0009RP8HO
Best Sellers Rank	#11,946 in Automotive ( See Top 100 in Automotive ) #4 in Silicone Sealers #618 in Oils & Fluids
Brand Name	GEAR AID
Color	Clear
Compatible Material	Silicone-treated Fabrics
Customer Reviews	4.6 4.6 out of 5 stars (1,600)
Global Trade Identification Number	00021563104400
Included Components	Seam Grip+Silicone Tent Sealer
Item Dimensions	4.88 x 1.05 x 8.01 inches
Item Form	Gel, Liquid, Paste
Item Type Name	Silicone Sealant
Item Weight	1.92 ounces
Manufacturer	GEAR AID
Material Type	Silicone
Model	10440
Number of Items	1
Part Number	10440
Style Name	Sealant 1.5 Oz
Surface Recommendation	Fabric
UPC	731673036149 021563104400
Unit Count	1.5 Ounce
Warranty Description	2 Year Warranty
Water Resistance Level	Waterproof

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