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We are pleased to offer our newest development EXPANDIT ! Now, you can increase the size of your original without distortion and with controlled expansion!! Expandit is a positive casting medium that you can use with any sealed or non-porous mold

Instructions for EXPANDIT:

. 10-minutes working time

. 1 1/2-hours demold time

. Mix ratio: 100 parts "A" to 50 parts "B" (by weight)
or
100 parts "A" to 54 parts "B" (by volume)

Since Expandit is a urethane product, if you use a silicone mold, no release is necessary. If you are using a urethane mold, you must first apply a wax or silicone spray release to the mold; otherwise, your Expandit cast will stick to it. Plaster molds must be sealed, and then a release applied over that. For instance, if you seal your mold with shellac, you will need to apply a separator (paste or spray wax) over that, or else the Expandit will stick to the shellac.

Do not use an electric mixer or drill, as this will introduce too many air-bubbles to the mix. Stir with a spatula; and then pour into a second container, so that what was on the bottom of the first container is now on top. Stir again with a spatula, then pour immediately. Remember that you have only about ten minutes of working time.

Expandit will not work in an alginate mold because the moisture immediately reacts with it, causing a separation between the surface of the Expandit material (that is in contact with the alginate) and the rest of the Expandit. The mold you use must therefore be moisture-free.

After de-molding, immerse casting in water and leave it there until it achieves the desired size. It is important to wait at least 24 hours after removing your casting from the mold before you immerse it in water. Initially, a bumpy texture may rise on the surface as it expands; however, this texture will eventually level-out as the form contiues to soak and reaches its fully expanded state. As the bumps disappear, the casting will retain all of its fine detail...even fingerprint detail! Bumpiness may occur as a result of "hard" water or if the csting has not been allowed to"rest" for twenty-four hours after removal from the mold, to all ow the material to stabilize before immersing it in water. The maximum expansion is approximately double in size. The duration of the expansion process will vary, depending upon the size of the casting. It can take anywhere from a few hours (for tiny pieces) to a few days (for larger pieces) to achieve maximum expansion; so you must carefully monitor the process if you want a precise size.

If you remove the casting from the water, it will slowly reduce back to the original size. This property can be helpful if you have accidentally allowed your piece to expand more than you had wished. Once you begin your permanent mold of the expanded casting, it will quickly be sealed-off by your molding rubber, so it will not tend to shrink from its expanded state.

.Part A of EXPANDIT has a very limited shelf-life. The more air in the container, the shorter its useable life-span. Always store Part A in a cool place to prevent crystallization. If you use 20% or more of the material, it is always best if you transfer the remainder into a smaller container so that there is less air between the lid and the top of Part A; otherwise, it will tend to gel or crystallize in a matter of just a week or two. If your containers are well-sealed, with very little air between Part A and the lid of the container, it could last for months.

Some distortions may occur, depending upon the shape of the object and how many times you enlarge it.

NOTE: Do not attempt to cast forms thicker than two inches; otherwise, you may experience serious cracking and distortion. If the piece you are enlarging is more than two inches thick, you must hollow cast (with a core) in order to achieve a successful enlargement. If you need guidance with this, please telephone us for technical help!

SAFETY NOTE: Expandit is a urethane product. Skin contact withe the raw materials should be avoided, so please wear protective gloves and work in a well-ventillated area.

EXPANDIT is $12. per pound.

Minimum order is a three-pound kit ($36.)

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EXPANDIT!