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Janice Carter, University of Cambridge

The person in WPI I deal with is Julian Williams and he has been very helpful in sorting out any problems we may have and finding items that we require. He is very pleasant to deal with and I have used WPI for the last 8 years and I am very happy with the service that they provide us.
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KWIK-SIL

KWIK-SIL

Low toxicity silicone adhesive for live tissues.

Kwik-Sil™ is a translucent, medium-viscosity silicone adhesive, developed for chronic peripheral nerve studies such as anterograde tracing with fluorescent indicators or electrode recording. Good adhesion and mechanical properties (tear strength and elongation) allow days of study without breaking of the bonding. Curing speed is very reproducible.



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Overview

KWIK-SIL KWIK-SIL KWIK-SIL

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KWIK-SIL / KWIK-CAST Instruction Manual
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Ideal for neuroscience applications, nerve studies and more

  • Bio-compatible surgical adhesive for live tissue and nerve studies
  • Pre-mixing tips simplify use (Includes 10 mixing tips)
  • Medium strength adhesion
  • Low toxicity
  • Rapid curing silicone adhesive, cure on contact
  • Cures without producing heat
  • The kit comes with (2) cartridges of 2 part silicone
  • Kwik-Sil surgical glue dries clear; Kwik-Cast dries green
  • Kwik-Sil surgical glue dries a little faster than Kwik-Cast

KWIK-SIL Overview

The properties of this bio-compatible surgical adhesive make it exceptionally useful for neuroscience applications, peripheral nerve studies and similar biomedical applications. These  silicone elastomers also eliminate the mess and time involved in pre-mixing other commonly used formulations (such as Wacker SilGel® and Sylgard®). Each silicone elastomer is packaged in a double barrel syringe and is automatically mixed when pressed out of the mixer tip provided. It can then be applied directly to the tissue without further mixing. The curing time of these silicone adhesives is short, reliable and reproducible. This eliminates potential costly guesswork when using other tissue adhesives. The curing process does not produce any heat, which can cause tissue damage. WPI's silicone elastomers are much less toxic than dental silicone, because they contain no surfactant additives.

The silicone adhesive inside the syringes cannot be sterilized by any means including UV, gamma, H2O2, autoclaving or EtO.

The exterior and the tips can be immersed in or wiped with 70/30 alcohol or you can use a liquid sterilant like Cidex OPA or Rapicide OPA.

Toxicity

WPI's silicone elastomers are based on recently developed vinyl terminated siloxane and platinum complex catalysts. They exhibit exceptional low toxicity before, during and after curing. The traditional RTV silicone systems produce either acetic acid or alcohol during condensation; these compounds are toxic to living cells. In contrast, the only by-product of condensation from WPI™s elastomers is a small amount of hydrogen gas, which was shown not to cause any effect on nerve activity in highly sensitive peripheral nerves. Both elastomers cure on contact with the tissue. Currently, WPI provides rapid-curing silicone elastomers in two different formulas:Kwik-Sil is a translucent silicone elastomer adhesive with medium viscosity. It has good adhesion and mechanical property (tear strength and elongation). The very short curing time (approx. 1 minute) make it especially useful for moving preparations.

Low Toxicity Silicone Adhesive

See for yourself why KWIK-SIL silicone adhesive is so popular for life science applications. When you are looking for a low toxicity adhesive with some elasticity and good moisture resistance, a silicone adhesive is the option of choice. When used with living tissue, an adhesive must be:

  • Non-toxic
  • Fast Curing
  • Able to adhere to organic and inorganic surfaces

Kwik-Sil Benefits, Low Toxicity, Fast Curing, Not Sensitive to Contamination

 

Kwik-Sil™ and Kwik-Cast™ silicone adhesives have very low toxicity before, during and after curing. The by-product of curing is a small amount of hydrogen gas, which is much less toxic to cells than acetic acid or alcohol from traditional RTV silicones. 

Kwik-Sil™ and Kwik-Cast™ have a curing speed that is hundreds of times faster than traditional RTV silicones. A curing time of a few minutes at room temperature is especially useful for encapsulation of live tissue or implanting into a live animal.

Kwik-Sil™ and Kwik-Cast™  surgical adhesives are not sensitive to contamination from animal tissue, unlike many vinyl-based silicones in which the platinum complex catalysts which are easily poisoned by contamination from amines and animal tissue.

Curing Time

The properties of this bio-compatible surgical adhesive make it exceptionally useful for neuroscience applications, peripheral nerve studies and similar biomedical applications. These  silicone elastomers also eliminate the mess and time involved in pre-mixing other commonly used formulations (such as Wacker SilGel® and Sylgard®). Each silicone elastomer is packaged in a double barrel syringe and is automatically mixed when pressed out of the mixer tip provided. It can then be applied directly to the tissue without further mixing. The curing time of these silicone adhesives is short, reliable and reproducible. This eliminating potential costly guesswork when using other tissue adhesives. The curing process does not produce any heat, which can  cause tissue damage. WPI's silicone elastomers are much less toxic than dental silicone, because they contain no surfactant additives.

The silicone adhesive inside the syringes cannot be sterilized by any means including UV, gamma, H2O2, autoclaving or EtO.
The exterior and the tips can be immersed in or wiped with 70/30 alcohol or you can use a liquid sterilant like Cidex OPA (WPI P/N 7364-4) or Rapicide OPA (WPI P/N 504611).

Q&A

Q: I want to use KwikSil surgical glue in my "imaging" experiments in rats. How do I get rid of the bubbles completely, or at least reduce them as much as possible?

A: The bubbles are hydrogen gas that is released as a by-product of the curing process. The cure happens in such a short period that the gas can't escape. A slower cure time might help. To slow the cure process, cool the material before mixing. 

Kwik-Sil™ New Tip Design

Evom Transcellular and Paracellular Pathway of Ion or Electrical Current Flow

Kwik-Sil™ and Kwik-Cast™ now come with a new tip design. The new tip is engineered to minimize leakage.

Kwik-Sil™ Applications

Kwik-Sil™ silicones are based on technology with vinyl terminated siloxane and platinum complex catalysts. In order to cure at room temperature, special cross linkers and high catalyst concentration are used. Although the high concentration of catalysts makes these products more costly than traditional RTV silicones and less attractive for general usage, they provide an excellent value in applications for the biological research field. 

Kwik-Sil Applications Icons, Neuroscience, Nerve Studies, Biomedical Applications

 

 

Benefits

  • Low toxicity surgical adhesive
  • Rapid cure time

Applications

  • Neuroscience and nerve studies
  • Biomedical applications

Kwik-Sil and Kwik-Cast silicone adhesives have very low toxicity before, during and after curing. The by-product of curing is a small amount of hydrogen gas, which is much less toxic to cells than acetic acid or alcohol from traditional RTV silicone systems.

Kwik-Sil and Kwik-Cast curing speed is hundreds of times faster than traditional RTV silicones. A curing time of a few minutes at room temperature is especially useful for encapsulation of live tissue or implanting into a live animal. Unlike many vinyl-based silicones in which the platinum complex catalysts are easily poisoned by contamination from amines and animal tissue, Kwik-Sil and Kwik-Cast  surgical adhesives are not sensitive to contamination from animal tissue.

Kwik-Sil™ is a translucent, medium-viscosity silicone adhesive, developed for chronic peripheral nerve studies such as anterograde tracing with fluorescent indicators or electrode recording. Good adhesion and mechanical properties (tear strength and elongation) allow days of study without breaking of the bonding. Curing speed is very reproducible.

Kwik-Cast™ is a very low viscosity silicone sealant developed to embed peripheral nerves with electrodes for acute multi-fiber recordings. It flows easily, filling the small spaces around the nerve and leaving no channels through which peritoneal fluid can travel and thus short the nerve/electrode contact. Equally important is the ability of the material to flow into itself and create one continuous mass from underneath the nerve all the way to the top of the nerve/electrode contact to ensure long-term recording stability. Kwik-Cast is color-coded to make the mixing foolproof. The catalyst is yellow and the base is blue. When uniformly mixed, it is green. Kwik-Cast can be applied and cured underneath mineral oil. After recording, electrodes are easily recovered due to the low tear strength. The slight longer curing time (approx. 3 minutes) makes it more suitable for stationary preparations and in vitro tissue studies.

KWIK-SIL Videos

Kwik-Sil™ vs Kwik-Cast™

Kwik-Sil Vs. Kwik-Cast

 

Both Kwik-Sil and Kwik-Cast are silicone adhesives, but they are a little different.

Kwik-Sil is a translucent, medium-viscosity silicone adhesive, developed for chronic peripheral nerve studies such as anterograde tracing with fluorescent indicators or electrode recording. Good adhesion and mechanical properties (tear strength and elongation) allow days of study without breaking of the bonding. Curing speed is very reproducible.

Kwik-Cast™ is a very low viscosity silicone sealant developed to embed peripheral nerves with electrodes for acute multi-fiber recordings. It flows easily, filling the small spaces around the nerve and leaving no channels through which peritoneal fluid can travel and thus short the nerve/electrode contact. Equally important is the ability of the material to flow into itself and create one continuous mass from underneath the nerve all the way to the top of the nerve/electrode contact to ensure long-term recording stability. Kwik-Cast is color-coded to make the mixing foolproof. The catalyst is yellow and the base is blue. When uniformly mixed, it is green. Kwik-Cast can be applied and cured underneath mineral oil. After recording, electrodes are easily recovered due to the low tear strength. The slight longer curing time (approx. 3 minutes) makes it more suitable for stationary preparations and in vitro tissue studies.

 

 

Specifications

KWIK-SIL Silicone Adhesive Compound (two 5-mL syringes)

  Kwik-Sil
MIX RATIO 1 to 1
WORKING TIME < 5 minutes*
SETTING TIME (ROOM TEMP., 1:1 RATIO) 5–10 minutes**
CURE TIME ~15 minutes
VISCOSITY, CPS 15,000
GUARANTEED SHELF LIFE AT 23 °C 6 months
VOLUME 5 mL
NUMBER OF MIXING TIP 10
DEAD VOLUME OF THE MIXING TIP <0.12 mL
AFTER CURING 24 HOURS:  
TEAR STRENGTH, PPI 90
ELONGATION % 650
DUROMETER (SHORE A-2) 30
COLOR translucent
VOLUME RESISTIVITY, W/CM 1x1015

* 3 minutes average with about 90 seconds of liquidity

** no longer mixable at this point

Accessories


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600022

600022

Replacement Mixing Tips for KWIK-SIL and KWIK-CAST. Package of 10. For use with the new...

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Citations

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Kawada, T., Turner, M. J., Shimizu, S., Fukumitsu, M., Kamiya, A., & Sugimachi, M. (2017). Aortic depressor nerve stimulation does not impede the dynamic characteristics of the carotid sinus baroreflex in normotensive or spontaneously hypertensive rats. American Journal of Physiology - Regulatory, Integrative and Comparative Physiology, 312(5). Retrieved from http://ajpregu.physiology.org/content/312/5/R787 

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Bechtold, A. G., & Scheuer, D. A. (n.d.). Glucocorticoids act in the dorsal hindbrain to modulate baroreflex control of heart rate.

Gao, L., Zhu, Z., Zucker, I. H., & Wang, W. (n.d.). Cardiac sympathetic afferent stimulation impairs baroreflex control of renal sympathetic nerve activity in rats.

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Yamamoto, K., Kawada, T., Kamiya, A., Takaki, H., Miyamoto, T., Sugimachi, M., & Sunagawa, K. (n.d.). Muscle mechanoreflex induces the pressor response by resetting the arterial baroreflex neural arc.

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Woolley, A. J., Desai, H. A., Gaire, J., Ready, A. L., & Otto, K. J. (2013). Intact Histological Characterization of Brain-implanted Microdevices and Surrounding Tissue. Journal of Visualized Experiments, (72), e50126–e50126. http://doi.org/10.3791/50126

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