Smooth-On Silicone Mold Making, Liquid Rubber OOMOO 30, Easy to Use - Trial Size 2.8 lb
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- MIX RATIO: 1A:1B BY VOLUME - Easy to use silicone rubber compound features a convenient one-to-one by volume mix ratio, no scale is necessary
- SHORE A HARDNESS: 30 - This scale measures the hardness of flexible rubber molds. A 30A hardness is in the soft to medium soft range, between the flexibility of a rubber band and pencil eraser
- POT LIFE: 30 MINUTES, CURE TIME: 6 HOURS - This product cures at room temperature with negligible shrinkage. Best to store at room temperature, see "For Best Results" section below
- LOW VISCOSITY FOR EASY MIXING AND POURING - Great for making simple one- or two-piece block molds, no vacuum degassing is necessary
- PERFECT FOR ART AND INDUSTRIAL APPLICATIONS - Often used for molds to reproduce sculptures and other prototypes, casting plaster, resins, and wax
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Use this silicone mold making rubber for making perfect reproductions of original models. It captures intricate detail and is easy to use. OOMOO 30 is easy to use silicone rubber compounds that feature convenient one-to-one by volume mix ratios (no scale necessary). Very low viscosity for easy mixing and pouring and vacuum degassing is not necessary. Cures at room temperature with negligible shrinkage. OOMOO 30 has a 30-minute pot life, with a six-hour cure time. For the novice mold maker - OOMOO30 does not have great tear strength. They are good for making simple one- or two-piece block molds. OOMOO30 is suitable for a variety of art-related and industrial applications including making molds for sculpture and prototype reproduction, casting plaster, resins and wax. Net weight 16 oz. (454 Grams). Technical information mixing ratio: one to one by volume (100a:130b by weight) pot life: 30 min. Demold: 6 hrs. Color: lavender properties (part aand b mixed) viscosity: 4,250 cps g/cc: 1.34 Cu. In./Lb.: 20.6 Tensile strength: 240 psi elongation at break: 250% die c tear strength: 40 pli compression set: 37% shrinkage:.0025 In./In. For Best Results: Store and use silicone products at room temperature. If material freezes, silicone base will become very thick. Simply allow product to get down to room temperature before use.
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Top customer reviews
The two parts are easy to mix. Unlike resins, the Oomoo will cure just fine even if it's not a perfect 1:1 ratio, so if you don't have or don't want to dirty a measuring cup, it will still turn out fine even if you just eyeball the amounts of part "A" and "B" you pour. One thing I wish the Oomoo had is a more "pourable" opening--the goo tends to run down the sides, so keep tissue close at hand.
The instructions say to let the mold cure for 6 hours, but since I was using it for very small jewelry pieces, it was done in closer to 4-5 for me. Definitely make sure to invest in some mold release if you are doing a two-part mold; I used vaseline in a pinch, which worked okay, but I still had a bit of trouble separating it.
I cast some Castin' Craft clear resin inside the mold. I was pleased with how my piece cured. It was detailed and while not perfectly clear, it was MUCH better than it had been when I'd tried other molds. With a bit of shining and some glossy glaze applied to the outside, it was see-through. My only concern was that the resin tended to splash out along the "seam" of my mold. Although it stayed confined and didn't drip outside, I definitely felt better leaving the mold on top of a bit of plastic instead of straight on a tabletop. This did also leave a slight ridge around where the two pieces of the mold fit together. The excess resin was easy to peel off and with some slight scratching with my fingernail, I was able to make it less noticeable--but it is still there.
Bottom line: I would definitely recommend this for any kind of mold-making you need to do. Don't be put off by the fact it's twice the price as other mold makers or takes a little while longer to cure. It creates superior molds and is well worth the price.