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Smooth-On SIL-Poxy™ is a professional-grade, flexible RTV silicone adhesive in a convenient 0.3 oz tube, designed for strong, waterproof bonding of silicone to silicone and other materials. It offers high elongation without cracking, cures in 24 hours, and withstands UV, moisture, and temperature extremes—ideal for repairs, moldmaking, and special effects applications.







| ASIN | B00IRC1YI0 |
| Best Sellers Rank | #17,023 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #171 in Sculpture Molding & Casting Products |
| Brand Name | Smooth-On |
| Color | White |
| Compatible Material | Ceramic, Glass, Metal, Plastic, Rubber |
| Container Type | Tube |
| Customer Reviews | 4.5 4.5 out of 5 stars (551) |
| Full Cure Time | 24 Hours |
| Item Form | Gel |
| Item Package Quantity | 1 |
| Item Weight | 0.02 Pounds |
| Manufacturer | Smooth-On, Inc. |
| Material Type | Rubber,Silicone |
| Model | 1 |
| Other Special Features of the Product | Strong |
| UPC | 751635953109 |
| Unit Count | 3.0 Ounce |
| Viscosity | Low |
| Volume | 90 Milliliters |
| Water Resistance Level | Water Resistant |
S**T
Perfect for my silicone mermaid tail
I use this on my silicone mermaid tail and it worked FANTASTIC!! Waterproof, quality adhesive, allows flexibility, and highly durable. The color works great in small areas as it's clear
R**R
Impressive
If you've ever needed to glue silicone together such that it is stretchy and strong, this is the one. I fully expected this to break on the seam or have a nasty hard spot. I was impressed that it was strong, didn't catch the eye, was super simple to apply and use, and fully connected and sealed the silicone test pieces I made to experiment with this.
J**J
A must-have for silicone props and masks
Strong! I had a tear in one of my silicone hand, and this stuff makes it like it never happened. A must-have for silicone props and masks.
D**E
A literal game changer for silicone items/props
I’ve always struggled making props with silicone and trying to find viable ways of adhering them to anything else without damaging my silicone or having items tear. SIL– poxy made it insanely easy to affix silicone pieces to just about any kind of fabric. I’ve already gone through one whole tube, and purchased two more since then. The adhesion is strong, the items have held up well in my washing machine with both cold and hot water, and I stress-tested the h311 out of my items by running them through the dryer several times, leaving them out in the heat, testing different solvents and chemicals to see how they would hold up and the SIL-poxy managed to hold up extremely well under all the conditions I subjected it too. Smooth-on makes incredible products all around!
C**L
Works amazing, but wear proper PPE!!!
One thing I learned with E6000 adhesive, was you can get toxic chemical poisoning incredibly easily... so I made sure to read all the instructions and info on this packaging before I started using it. One day a friend swung by and she couldnt hear me through my giant respirator (which has the duel side filters), and I removed it. A couple hours of working without it, I was super sick, dizzy and needed to chug fluids to flush that out of my system. Be smart, be safe, wear the proper PPE. Now! That being said! I am SO impressed with how much product you get in such a small container. I'm working on a 6foot 3inch long tail, individual scaling, and I was able to do about 60-70% front and back, before I ran out of the first tube. I've since finished the scaling, and done the fluke, and still have about 50% of the second tube. It adheres really well until you get into the mid 80s for temperature. Then it starts acting a little goofy. But the days it was 72-83 ish; worked perfectly and I have no complaints. I know things acted odd the other day because it was too hot outside. I really need my own shop.
G**O
This is how you bond silicone.
Absolutely THE WAY TO GO if you are trying to bond polysiloxane (a.k.a. silicone) to itself. Cure is within minutes. This product is fantastic for prototyping. This product is for people who have a firm grasp of what they are trying to bond.
J**C
Second to none
The best solution i found to fix a silicone mold that had torn. It fused all parts flawlesly. Highly recomended for rubber or silicone molds that need repairs.
S**F
Not worth it - not sure how I got sold on this
I feel a little bit like a fool. Silicone adheres to silicone - you don't need this. Even to fix silicone molds which is why I got it and how it was "sold" to me. This smells and behaves just like the big tube silicone - pretty sure it's the same stuff. I can't speak to this for sure as I am not a silicone expert, but to me, this feels like clever marketing. Way too expensive for what you get, but it is marketed like it is special silicone adhesive. AND it did not do anything special when fixing a mold, which was the reason I purchased it. Live and learn. You can fix your molds with 100% clear silicone ... you absolutely do not need this. At least I learned I didn't need it. Feeling ripped off. Smooth-on has great products which is why I trusted the people telling me about this stuff. And maybe there is a use case I'm missing.
M**N
I was looking for a good adhesive to bond and repair a silicone tear. This product seems to be strong enough though a bit difficult to keep surfaces of the tear close together. That is not a fault of the adhesive. The original material won't stretch as much but is satisfactory in my case.
B**I
I was looking for a silicone to silicone adhesive & Silpoxy was recommended by most internet searches. Pleasantly surprised that this was available on Amazon.in. This glue works perfectly & gets a very good bond. It’s quite expensive but there are hardly any alternatives. I wish the seller should provide an option to buy a smaller size to test out for potential buyers who may want to test this first before committing.
S**A
تم شراء المنتج حسب الشروحات ولكن لايعمل بين القماش والسلكوان مثل ماكان مكتوب عنه .. منتج سي سي جدا جدا ومضيعه للمل.. انصح بعد شرا..
M**M
😩It is a waste of money.
D**A
This item is great adhesive and works very good. It's a bit expensive but if you don't mind flexibility then it can be mixed with other silicone rtv adhesive to increase the volume of glue and it still adhere very well. For best results the surface needs to scratch with fine sand paper and cleaned with IPA. My project is completed with this and without it I might need to buy silicone primer like silanes. I am happy that this product exists. Thanks.
Trustpilot
2 months ago
5 days ago