Elastomeric Gel vs. Silicone
Results of Material Properties Tests (Video & Photo)
Evidence of the superiority of Elastomeric Gel
Compression Tests
Elasticity Tests
Video Clips

To understand the test protocol and results, scroll down to see the notes for each image and video clip.

Or you may click on any thumbnail to start the tour of enlarged images (and notes) in sequence.






























Introduction

People ask us every day about or patented elastomeric gel, and many still confuse our gel with silicone, which is much harder and tears easily. That is why we rejected silicone as a candidate material in our tests over 10 years ago. It is easy to demonstrate the visual superiority of our gel on the web (see the clips of how realistically the gel moves in our Torso Gallery), but it is impossible to demonstrate on the web how realistic it FEELS.

The video clips and photos below are evidence of the superior material properties of our elastomeric gel over silicone. These tests are simple to perform, and they can be duplicated by anyone, anywhere, with the same results. In these tests we compared a sample of our gel that was cast in a metal bowl (the approximate size and shape of a large breast) to a silicone breast casting sold by a competitor.

As these images and clips clearly demonstrate, our gel is many times softer than silicone. At the same time, our gel is 6 times more durable than silicone (i.e., it will stretch 6 times further before tearing).

In a laboratory setting, material hardness is measured on what is known as the Shore A Scale. An automobile tire has a Shore A durometer value of 60 to 95. Jell-O has a value of about 3 to 6. Because most people don't own the necessary measuring equipment, we devised a compression test using a wooden dowel with 15-1/2 lbs. of weight on it.


Compression Tests
Picture 1- Silicone Compression Test 1: These are 2 of the samples to be tested; the bowl-shaped gel sample is on the left, and the silicone breasts are on the right.
Picture 2- Silicone Compression Test 1: A view of the underside of the silicone breasts shows how the manufacturer attempted to make the silicone appear softer by making the breasts hollow. The silicone breasts are actually only 3/4" to 1-1/4" thick, the thickest part being behind the nipple.
Picture 3- Elastomeric Gel Compression Test 1: See how the entire length of the finger effortlessly enters the gel sample. If a finger were strong enough to enter a silicone sample as far, the silicone would tear.
Picture 4- Silicone Compression Test 1: The finger poke to the silicone breast (on the bottom of the breast, so as to miss the hollowed out interior section) shows the silicone resist significant penetration.
Picture 5- Compression Test 2: The 7/8" wooden rod is weighted with 15-1/2 lbs. This value is displayed on the digital scale. 
Picture 6- Elastomeric Gel Compression Test 2: The rod is about to be lowered onto the gel sample.
Picture 7- Elastomeric Gel Compression Test 2: The rod is allowed to sink freely into the gel sample. 
Picture 8- Elastomeric Gel Compression Test 2: The rod is marked to show the limit of penetration into the gel sample.
Picture 9- Silicone Compression Test 2: Next, the rod is allowed to sink as far as it can into the flat part of the silicone sample. 
Picture 10- Silicone Compression Test 2: Then the rod is marked again to show the limit of penetration into the silicone sample.
Picture 11- Compression Test 2 Results: The marks on the weighted wooden rod are measured for comparison. The mark at the top shows that the rod depressed the gel to a depth of 3", while the next mark shows that the rod sank into the flat silicone sample less than 5/8". The mark just below that shows that the rod sank into the curved part of the silicone breast from a minimum of 1/4" to a maximum of 3/4". The gel in this test compressed 5 times as far as the silicone. 
Picture 12- Elastomeric Gel Compression Test 3: Laid side-by-side for comparison, the gel compresses easily under fingertip pressure. 
Picture 13- Silicone Compression Test 3: The flat section of the silicone breasts does not compress as dramatically under fingertip pressure.
Picture 14- Compression Test 3: A nearly flat section of the silicone breasts (which tapers from 5/8" to 1-1/4") is laid in top of a 1" gel slab and both are measured.  
Picture 15- Compression Test 3: Both the silicone and the gel are compressed at the same time. Clearly, the silicone compress less easily than the gel. If the gel slab had been laid on top of the silicone, the gel would have compressed almost entirely before the silicone started to compress. In this test we could not have reversed the positions without cutting the breasts off to make both samples flat.
Picture 16- Elastomeric Gel Compression Test 4: The 1" slab of elastomeric gel is highly compressible. The sample can be easily constricted by thumb and forefinger, displacing the mass of the gel in the area of deformation to the surrounding areas. 
Picture 17- Silicone Compression Test 4: Silicone breast is collapsed by compressing it. The manufacturer made the breasts hollow in an attempt to make them softer. Even so, the rigidity of the breast exerts sufficient force to create a vacuum against the plywood workbench when the air is forced out. You can hear the sucking sound of the air on the video when the vacuum breaks. In simulating the precise feel of human flesh, shape memory is a desirable quality, but rigidity is highly undesirable.

Stretch Tests
Picture 1- Silicone Stretch Test (preparation): A 1-1/2" strip is cut from the flat section along the bottom of the silicone breasts. This is the longest and widest flat sample we could take; that made it the most useful for comparison purposes.
Picture 2- Silicone Stretch Test (preparation): The silicone breasts are turned over to allow a straighter cut from the back side.
Picture 3- Elastomeric Gel Stretch Test (preparation): A strip of elastomeric gel is cut from the slab used in the compression tests.
Picture 4- Stretch Test (preparation): The 2 strips are shown side-by-side. They are the same approximate width. The silicone strip (in the background) tapers in thickness from 1/2" at the ends to 1-1/4" in the center. The gel strip (in the foreground) is shorter than the silicone strip by several inches. A tape measure is visible in the background of this (and all that follow) in order to establish scale. For reference, the 12" mark is the dark black one (in boldface type).
Picture 5- Silicone Stretch Test 1: The silicone strip is anchored by the weight of a thumb (on the left side) and pulled toward the right. This is the point of maximum stretch (the elastic limit) of the silicone sample.
Picture 6- Silicone Stretch Test 1: After stretching less than 100%, the silicone strip tears. This picture was captured at the moment of failure, as can be seen on the left side of the image.
Picture 7- Silicone Stretch Test 1: After lifting up the thumb, the piece of silicone that tore of strip can be seen.
Picture 8- Silicone Stretch Test 1: The piece that tore off is from the narrow end of the tapered silicone sample (1/2" thick), so the test is repeated below on the slightly thicker new end of the silicone.
Picture 9- Silicone Stretch Test 2: Again, the silicone strip is anchored by the weight of a thumb (on the left side) and pulled toward the right.
Picture 10- Silicone Stretch Test 2: This is the point of maximum stretch (the elastic limit) of the silicone sample in Test 2.
Picture 11- Silicone Stretch Test 2: After stretching less than in the first test (due to the fact that the silicone had been shortened in Silicone Stretch Test 1, the silicone strip tears again. This picture was captured at the moment of failure, as can be seen on the left side of the image.
Picture 12- Silicone Stretch Test 2: The new 5/8" thick piece that tore off is from the narrow end of the tapered silicone sample, so the test is repeated yet again on the slightly thicker new end of the silicone.
Picture 13- Silicone Stretch Test 3: Again, the silicone strip is anchored by the weight of a hand this time and pulled toward the right. Due to the greater force required to stretch the shorter, thicker remaining silicone sample, the hand is used to anchor the left end rather than a thumb.
Picture 14- Silicone Stretch Test 3: This is the point of maximum stretch (the elastic limit) of the silicone sample in Test 3.
Picture 15- Silicone Stretch Test 3: After stretching less than in the previous test (due to the fact that the silicone had been shortened in Silicone Stretch Tests 1 and 2), the silicone strip tears, yet again. This picture was captured at the moment of failure, as can be seen on the left side of the image.
Picture 16- Silicone Stretch Test 3: The next piece of silicone that tore off (3/4" thick this time) is shown next to the first 2. It is bigger due to the fact the the silicone strip tapers in thickness toward the center.
Picture 17- Elastomeric Gel Stretch Test 1: The shorter elastomeric gel sample is of roughly the same width and (average) thickness as the silicone sample.
Picture 18- Elastomeric Gel Stretch Test 1: The Elastomeric Gel strip is anchored by the weight of a thumb (on the left side) and pulled toward the right.
Picture 19- Elastomeric Gel Stretch Test 1: The Elastomeric Gel sample is stretched several times its original length. Because the end of the strip is actually off-camera, the precise percentage of elongation cannot be calculated from this image. The point of maximum stretch (the elastic limit) of the Elastomeric Gel sample was never reached.
Picture 20- Elastomeric Gel Stretch Test 2: Entirely unharmed from the first stretch test, the Elastomeric Gel strip is grasped at both ends and stretched again.
Picture 21- Elastomeric Gel Stretch Test 2: The Elastomeric Gel strip is stretched diagonally in an attempt to keep the ends in the shot (the camera was on a tripod).
Picture 22- Elastomeric Gel Stretch Test 2: Again, the Elastomeric Gel sample is stretched several times its original length. Because both ends of the strip are off-camera, the precise percentage of elongation cannot be calculated from this image. The point of maximum stretch (the elastic limit) of the Elastomeric Gel sample was never reached.
Picture 23- Elastomeric Gel Stretch Test 3: Entirely unharmed from Stretch Test 2, the Elastomeric Gel strip is anchored by the weight of a hand (on the left side) and pulled toward the right.
Picture 24- Elastomeric Gel Stretch Test 3: The Elastomeric Gel strip is stretched is several directions.
Picture 25- Elastomeric Gel Stretch Test 3: The purpose of testing the elasticity of the Elastomeric Gel strip in different directions is to ascertain that there are no tears beginning to propagate anywhere in the sample. If they had been, the gel sample would have torn through.
Picture 27- Elastomeric Gel Stretch Test 4: Entirely unharmed from Stretch Test 3, the Elastomeric Gel strip is anchored by the weight of a thumb (in the middle this time) and pulled toward the right. This effectively reduced the length of the sample by 50%.
Picture 28- Elastomeric Gel Stretch Test 4: The shortened Elastomeric Gel strip is stretched again.
Picture 29- Elastomeric Gel Stretch Test 4: Again, the Elastomeric Gel sample is stretched several times its original length. Because one end of the strip is off-camera, the precise percentage of elongation cannot be calculated from this image. The point of maximum stretch (the elastic limit) of the Elastomeric Gel sample was never reached.
Picture 30- Elastomeric Gel Stretch Test 5: Entirely unharmed from Stretch Test 4, the Elastomeric Gel strip is clasped at both ends in order to be stretched.
Picture 31- Elastomeric Gel Stretch Test 5: Again, the Elastomeric Gel sample is stretched several times its original length. Because both ends of the strip are off-camera, the precise percentage of elongation cannot be calculated from this image. The point of maximum stretch (the elastic limit) of the Elastomeric Gel sample was never reached.
Picture 32- Elastomeric Gel Stretch Test 6: In this test we stretch the same bowl shaped elastomeric gel sample used in the Compression Tests (at top of page).
Picture 33- Elastomeric Gel Stretch Test 6: The elastomeric gel sample is grasped firmly in both hands as the hands are pulled apart.
Picture 34- Elastomeric Gel Stretch Test 6: The elastomeric gel sample is stretched again in another direction.
Picture 35- Elastomeric Gel Compression Test: The elastomeric gel sample is compressed. Note how easily the thumbs sink into the gel.
Picture 36- Elastomeric Gel Stretch Test 6: The elastomeric gel sample is stretched forcefully. Because one end of the gel sample is off-camera, the precise percentage of elongation cannot be calculated from this image. The point of maximum stretch (the elastic limit) of the Elastomeric Gel sample was never reached.
Picture 37- Elastomeric Gel Stretch Test 6: After vigorous stretching, the elastomeric gel sample immediately returns to its original shape (before the deforming force was applied). The sample is entirely unaffected by all compression and stretch tests.
  Video clips are at the bottom of this page...

Test Result Analysis

In the compression tests, while both samples displayed a high degree of shape memory, the silicone sample displayed high rigidity and low elasticity (resisting the 15 lb. weight), while the elastomeric gel sample displayed extreme flexibility and elasticity. The weighted rod compressed the gel sample many times further than the silicone sample.

In the stretch tests, the silicone sample tore easily in each test through successively larger cross-sections of the silicone. The silicone sample never exceeded 100% elongation before tearing. The elastomeric gel sample was stretched many times its original length without ever approaching the elastic limit. In addition, the gel samples were entirely unaffected by the entire suite of tests.

The tests above address the comparative feel and durability of elastomeric gel to silicone. In terms of visual appeal, the silicone sample displayed an undesirable shiny quality to the skin, whereas the elastomeric gel displayed a more realistic flat quality (without shiny highlights). The realism of the elastomeric gel in movement can be readily observed in the video clips in the torso gallery.

Postscript: The purpose of the tests was a comparison of the material properties of the samples relative to one another and to demonstrate which was superior in the application of simulating human flesh. These particular tests were not intended to test to failure, although the silicone did. In a laboratory setting, using samples of identical dimensions, silicone can be expected to stretch from 300% to 400% before tearing, while our elastomeric gel will stretch 1800% to 2400% before tearing. By combining the results of these tests with the video clips of the torso in the torso gallery, one may confidently extrapolate the "feel" of the gel. Anyone desiring to repeat and verify these tests for himself or for the media may purchase a sample from us.


Video Clips
Small Files

These videos are unedited clips of all compression and stretch tests. The short video clips are immediately below; the large master (source) files are at the bottom. They give the screen captures context. They have sound, but no narration. The videos are provided in 3 different formats (for different media players). They have the same content, duration, and resolution, but the file size of the different formats varies. You may have to wait for the larger files to download before playing.

Comparability: The AVI file should play directly from your browser. Use your browser's Refresh command if the file doesn't begin to play automatically; you don't have to hit the play button. If you don't have the DivX codec on your computer, you might not be able to play the AVI or MPG files. In that case, download the WMV file, which is compatible with Windows Media Player 6.1 or later. If you don't have Windows Media Player, the latest (and best) is version 10, and it is a free download from Microsoft. Here is a link to the precise download page: Windows Media Player 10. It is useful for playing all common video and audio files, creating playlists, managing media files in a library, and burning your favorite clips and songs to CD.

Compression: Finger Poke Test video (size: 300k - 1MB, duration: 18 sec.)- This video clip shows how soft and malleable the elastomeric gel is using only one's finger. Note how the gel allows an effortless finger poke (and bounces back to its original shape after the deforming force is removed. This is known as shape memory.) while the silicone resists significant penetration, bending the fingertip in the process.
Stretch: Test 6 video (size: 1-2 MB, duration: 25 sec.)- This video shows the bowl shaped elastomeric gel sample being alternately stretched and squeezed aggressively.
Compression: Squeeze Test video (size: 1-2 MB, duration: 30 sec.)- This video shows the flat elastomeric gel sample (before it was cut) being gathered together and squeezed in the center. It also shows the silicone breasts being compressed and deformed. If your speakers are off, turn them on in order to hear the sound of the suction when the silicone breasts break free of the plywood table.
Stretch: Tests 1 thru 3 video (size: 3-7 MB, duration: 1:40 min.)- This video shows the silicone strip being stretched to failure into 3 pieces of successively larger cross-sectional area. Then is shows the elastomeric gel strip being stretched many times further without negative effect.
Compression: Weight Test video (size: 2-10 MB, duration: 2:19 min.)- This 2 minute video clip shows the 7/8" wooden rod being weighted with 15-1/2 lbs. and lowered onto the gel sample and then onto the silicone breasts. The rod sinks easily into the gel (up to 3" deep), but it penetrates the silicone only 1/2" in the flat area tested, and a minimum of 1/4" to a maximum of 3/4" in the silicone breast itself. The gel in this test compressed 5 times as far as the silicone.
Medium Length Files
Compression: Weight Test (plus scale setup) video (size: 4-13 MB, duration: 3 min.)- This is a slightly longer version of the video immediately above. The additional footage shows the wooden rod being weighted and then weighed on a scale to show the 15.5 lbs. of force being applied in this experiment.
Stretch: Stretch Test Highlights video (size: 4-10 MB, duration: 2:13 min.)- This is a combination of the 2nd and 4th videos above. It contains the important parts of the stretch tests, without the preparation. To see the test preparation, scroll to the source files below.
 Source Files (Large!)
The files below are the unedited master videos of the entire suite of tests. They were taken directly as they were from the video camera and optimized for download. They are large files, with a combined length of 14 minutes (24-56 MB). The full-length files are not especially important to most people. They are offered only for those interested in duplicating our test protocol and to demonstrate that the tests were objective and fair. All the clips above (as well as the pictures) were captured from these 2 videos. They have sound, but no narration. You will get the same information in less time simply by reading the notes above and seeing the shorter clips. If you watch only these 2 videos, you will have seen everything, but you will still need to return to this page (or the tour) in order to read the accompanying notes.
Compression Tests (size: 12-30 MB, duration: 8 min.)- This is an unedited clip of all Compression Tests.
Stretch Tests (size: 12-26 MB, duration: 6 min)- This is an unedited clip of all Stretch Tests.