Our patented Polymer Bonding Process (Patent No: 10,577,521)
Silicone rubber is a polymer. Conventional wisdom dictates that you can not glue polymers, especially silicone rubber. Since we developed our Polymer Bonding Process, we have learned a lot about bonding polymers. One discovered fact is that silicone rubber is a very difficult polymer to glue. It is not just getting silicone rubber to stick to something, the challenge is to get silicone rubber to adhere with strength.
Why is silicone rubber so difficult to glue? Fundamentally, the difficulty is that silicone rubber is an elastomer. From trial and error, we have learned that, with elastomers, pressure is needed to create a bond to any surface. Greater pressure than with polymers like nylon, HDPE, polypropylene, etc. The key to bonding any type of silicone is applying extra firm pressure for fifteen seconds, when the two surfaces are brought together. When this technique is used in conjunction with the Bonding Poly Process, the silicone will be permanently, covalently bonded.
Our Process uses the laws of chemistry and the principles of Physics to create bonds. With elastomers, pressure effectively increases the surface area area available to bond. With the added pressure, the Process will bond silicone to itself, to any other polymer and/or to any other substrate quickly, easily and permanently. The steps of the Process are outlined later down the page. There is one type of silicone, platinum-cured silicone rubber, that requires extra steps to generate the results that you want. The details of the special treatment needed for platinum-cured silicone are at the bottom of this page.
100% Customer Satisfaction Guarantee
Whenever and wherever we state that we can bond silicone rubber, the reaction is skepticism. Skeptics are the reason why we have our 100% customer satisfaction guarantee. If any of our products or kits, do not meet your performance expectations, we will refund your purchase price. Simply return the item.
The steps for bonding silicone rubber to itself or to another poly surface.
- Use sandpaper or steel wool to rough the silicone rubber or poly surfaces.
- Clean the surfaces with a cleaner that will not leave a residue.
- Wipe with a soft cloth.
- Saturate the silicone rubber or poly surfaces with our Poly Prep, an adhesion promoter for polymers.
- Spray one of the silicone rubber (poly) surfaces with our Activator/Accelerator (AA).
- Warm both poly surfaces with a hair dryer or heat gun. By touch, you want the silicone/poly just to below hot. By temperature, about 120 degrees F.
- Apply an SI Structural Adhesive to the opposite surface from where you sprayed the AA. Make sure that the SI adhesive reaches the edges of the join.
- Very firmly Firmly press the two surfaces together for at least 15 seconds.
- Apply a bead of the SI Structural Adhesive to the seam between the surfaces.
- Spray the seam with the Activator/Accelerator.
As a result of this process, the two silicone rubber surfaces will be bonded. Operational strength is achieved almost immediately, but the strength of the bond is directly proportional to the amount of time it is given to fully cure.
To bond silicone rubber to steel; to bond silicone rubber to aluminum; to bond silicone rubber to metal
- Rough the surface of silicone rubber with sandpaper or steel wool.
- Sand the steel, aluminum or metal first with a coarse grade of sand paper.
- Then sand the steel, aluminum or and the metal with a low-grit (400 or 600) coarse sand paper. You want a near white finish or steel or polished surface for aluminum and other metals. It makes a difference.
- Clean all surfaces with a cleaner that will not leave a residue.
- Wipe with a clean soft cloth.
- Saturate the silicone rubber surface with our Poly Prep, an adhesion promoter for polymers.
- Spray a solvent based Activator/Accelerator (AA) on either the silicone rubber or metal.
- Warm the silicone rubber surface with a hair dryer or heat gun. By touch, you want the silicone/poly just to below hot. By temperature, about 120 degrees F.
- Apply an SI Structural Adhesive to the opposite surface from where the AA was sprayed.
- Firmly press the two surfaces together for a minimum of fifteen seconds.
As a result of this process, the silicone rubber and metal surfaces are bonded. Operational strength is immediate, but the strength of the bond is directly proportional to the amount of time it is given to fully cure.
The Secret to our patented Polymer Bonding Process
What’s the secret of the Polymer Bonding Process? It’s the chemical and molecular reaction created when we combine:
- a polymer-enhanced, Surface Insensitive Structural Adhesive;
- our standard Activator/Accelerator, (the chemistry)
- the Poly Prep (chemistry again)
- Heat (the molecular reaction part of the process.)
The Poly Kit
To bond polymers, you need at least a Poly Kit. Our Poly Kit (shown below) includes;
- an SI Structural Adhesive, either our standard SI Blue, our thicker SI Black or the ultra-thin SI Green.
- our standard Activator/Accelerator,
- the Poly Prep,
- a detailed step-by-step instruction sheet.
Finally, a comment from one of our Poly Kit users.
Dear Don…no worries…I’d like to order some more…this stuff is the bomb and has worked perfectly on my slippery silicone …can’t thank you enoughCan you hold on that shipment so I can add to it …if not …no problem
Platinum-cured Silicone Rubber
Working with freshly minted platinum-cured silicone rubber is especially difficult. Chemical reactions are sill going on within freshly minted silicone rubber. Those reactions interfere with the chemical reactions critical to the Process. What is needed to offset the newness issue, is time. Once you firmly press the two pieces of freshly minted, platinum-cured silicone rubber together for the fifteen seconds necessitated by the Process, you need to give the result time.
Give the new/repaired piece a minimum of twenty-four hours to cure. Then you can put the piece back into use. More mature platinum-cured silicone rubber is easier to bond, but we still recommend the wait for all platinum-cured silicone rubbers.
Save 15% With Tech-Bond Kits
Online Store- Any of our Poly, Deluxe or Professional Kits will bond Silicone to itself and any other substrate; except stainless steel and glass.
If you have any questions, feel free to call 877-565-7225.
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The handle broke on my silicone spatula. It separated completely and a 1/4 X 1 inch piece broke out of the handle. I could not find a replacement, so I attempted several times to repair the handle. Nothing lasted until I found this kit. It works great. I followed the directions and now have a tight bond that seems stronger than when it was new.
Not your average adhesive. Endless uses. Oil, water, gas doesn't touch it. I have used both the tech-bond kits and patches, to do all sorts of repairs.......including silicone. Does exactly what it says it will do. Needs to be seen to be believed. Getting things back apart without destroying them is not possible. Overall I would rate your products a 10+. I will order again.
I bought the standard poly kit and used it to bond a high performance silicone vaccuum hose. I needed something that would be able to handle higher temperatures, stay flexible and be resistant to chemicals. This is the only product I have been able to find that actually works, let alone will stay flexible and not break apart when it gets hot or is exposed to coolant. Amazing performance. Definitely recommend.