Simple 1:1 mix silicone mold making rubber, AM 125
This is a simple, 1:1 mix Silicone Mold Making RTV designed for beginners to mold making. It doesn't have quite as good properties as AM 128 shown above. However, it is ideal for most mold making applications. AM 125 silicone mold making rubber cures in
less than two hours. This molding RTV rubber is great for first time mold makers.
PLEASE NOTE: Do NOT expose AM 125 to any moisture; moisture ruins it! Re-cap the containers immediately after pouring. Store AM 125 at 72F/room temperature. AM125 has a 60 day shelf life once you open the containers.
AM 125 1/2 gallon kit - $67 Consists of one quart each part A and part B.
AM 125 1 gallon kit - $107 Consists of 1/2 gallon each part A and part B.
Translucent Silicone Rubber, AM 128T
Our translucent (frosted colorless) rubber is clear enough to see through it for cutting two part molds. AM 128T is a high performance mold making silicone rubber. AM 128T's mix ratio is 10:1 by weight.
Digital Scale - This scale is ideal for weighing silicone rubber and other chemicals. It is calibrated in grams or pounds/ounces. We use them here for measuring products and for weighing our boxes for shipping. It measures from as low as 2 grams to as high as 55 pounds.
Please Note: NO USB Cable or "C" batteries included.
Fast setting, one to one mix,
silicone RTV rubber putty
*This is the silicone putty featured on our Youtube video: "How to Use AeroMarine Products Fast Set Horse Hoof Silicone Putty"
Used to make rapid molds.
Safe to use on skin.
Each pound yields 21 cubic inches.
1 pound kit - consists of 8 ounces each
of Part A and Part B $45
8 pound kit - consists of 4 pounds each of Part
A and Part B $223
100 pound kit - consists of 50 pounds each Part
A and Part B $2250
Ships in 3-5 business days
Best practices when using AeroMarine Products Two Part Silicone RTV
Never mix less than about 3 ounces of product. When manufacturers design and test their silicones, they normally write the specifications for 100 gram batches, which is about 3 ounces.
Using less than 3 ounces makes it impossible to have the correct mix ratio.
Avoid mixing with drill motors. Mixing with an electric drill can cause a few problems. Frequently, they don't get into every corner of the mixing container. Powered mixing also can generate a lot of air bubbles.
Silicones don't necessarily need mold release.Silicones normally only stick to silicone, silica and glass. To release silicone from silicone, use petroleum jelly or our #33 Petrolease mold release. Never use silicone spray to release silicone from silicone- it acts as a primer and the parts will not separate. Most things cast into a silicone mold won't stick to the silicone. A mold release may be valuable however to prolong the life of the mold. We also stock a "Parfilm 4" release in an epoxy version and a urethane version. If you use a mold release, let it dry for about 10 minutes. A spray can of mold release contains a lot of solvents and propellants, which need to evaporate off the surface so they don't cause bubbles.
Don't vary the mix ratio. Follow the mix ratio on the container or the data sheet. Most (but not all) silicones are mixed in a 10:1 ratio by weight. Often this translates to a 9:1 ratio by volume. Accelerators are available to make the silicone cure faster. Since a silicone mold is a tool that can produce a lot of parts, it is best not to hurry when making the mold. Accelerators are not recommended. Don't alter the mix ratio in hopes of changing the cure cycle because it degrades the quality of the rubber.
Mix mold making silicone twice. Mix the two components together in a clean container, then transfer the mixture to another clean container and mix them again. The theory is that the liquids clinging to the sides and bottom of the containers don't get mixed well. By transferring the mixture to another clean container, you are assured that everything is well mixed.
Air bubbles in mold making. We all want to avoid air bubbles on the surface of a mold. Normally it is not an issue, but in some applications it can be troublesome. This is especially true when making figurines with intricate detail. In these cases, both when making the molds and when making the figurines it might be best to brush a thin coating onto the surface and then pour behind it. This way the bristles of the brush break the bubbles, resulting in a better surface.
Storing Your Cured Silicone Mold (Storage longer than 1 week)
First, apply mold release to your cured mold. Second, pour your casting material into the prepared mold. Or, you can insert a previously cast cured piece into the prepared mold. Third, put your mold (if a smaller mold) with the piece in it into a doubled “Ziploc” type bag with all the air pressed out of the bags. Fourth, seal the bags tightly closed using either a plastic bag sealer or over-tape them with duct tape. For larger molds, use very heavy duty doubled garbage bags, remove all the air and seal tightly either with a plastic bag sealer or over-tape with duct tape. Finally, put your sealed, bagged mold into a plastic storage container with a lid, close the lid and store on a flat shelf/surface (NOT the floor or window) at continuous 70F out of direct sunlight.
Cleaning Your Silicone Mold Wash your cured silicone mold with warm/hot water and mild liquid dish soap. Pat drythoroughly and then let the mold air-dry fully. Never use any type of abrasive soap, cleaner or pad to clean your silicone mold!
We also sell several accessory products for our silicones: