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*Here is how the two silicones compare:

 

20600, 20700 and 20800 properties are:  Red color, Mix ratio 20 to 1, Lower viscosity, accepts pouring temperatures up to 700 degrees F, cure time 8 hours.

 

20601, 20701, 20801 properties are:  Red color, Mix ratio 10 to 1, very High Tear Strength Silicone Resin is now useable up to 650 degrees F and can be poured hundreds of times. High tear strength which means its more flexible for removal of castings with undercuts without tearing the mold.

 

MINI RTV & ALUMILITE CASTING KIT

 

The Mini Casting Kit is a smaller version of Alumilite's #10500 Super Casting Kit and is perfect for someone who is casting a small project or is a first time user of liquid RTV materials. The Kit contains everything you need to mold and cast your part.

       

        8 oz. Kit of Alumilite Super Plastic

        113 grams of Alumilite's RTV Silicone

        1 lb. Synthetic Modeling & Mold Clay

        Measuring Cups

        Wooden Stir Sticks

        How to instructional brochure

 

Item # 10560  PRICE:     $30.00

 

NEW RTV MATERIALS
MAKE CUSTOM MOLD MAKING EASIER AND FASTER

Now you can make your own custom silicone rubber molds for metal casting easier with our Liquid RTV or Quick-Sil RTV (Room Temperature Vulcanization) materials. Liquid RTV Kits are available in 1.1 lb., 2.2 lbs., and a gallon size (11 lbs.). Quick-Sil comes in 2 lb. Kits.

Making a reusable mold with RTV Silicone Rubber is easy, fast curing
(8 Hours for liquid RTV and 20 minutes for Quick-Sil).
Ideal for use with plastics and wax originals or models too large for our Vulc-A-Mold tool.

To make a mold using our liquid RTV, mix the catalyst and red silicone rubber using a 20 to 1 ratio (rubber to catalyst).  Using a mixing stick, slowly stir in the catalyst until thoroughly mixed.  If you are going to use the entire container of rubber, use the entire contents of the catalyst jar.  You have a 45 minute work time before the material sets up and 8 hours or over night cure time.  If interested, see more detailed instructions below.

To make your own mold simply construct a pouring box or use our ADJUSTABLE SIZE WOOD MOLD FRAME PRESS, #5002. Place a non-reactive clay on the bottom of the box (#40000).  Position the model half way into the clay (to the desired parting line). Then mix the kit materials, brush a thin coating of the mixed material over the model, and pour the balance to cover the model by about 1/4". Wait 8 hours or overnight, lift out the poured top silicone, remove the model and clay. Place the silicone poured portion in the pouring box, position the model properly in the rubber cavity, repeat the above and pour the second side. Wait 8 hours or overnight to remove. Cut in the pouring gate with a sharp pen knife. That's all there is to it!

WORKING INSTRUCTIONS FOR LIQUID RTV PRODUCTS:
#20600, 20700 & 20800

RTV SILICONE RUBBER MOLD MAKING KITS

IMPORTANT: STIR WELL BEFORE EACH USE

BEFORE EACH USE, STIR PART A & PART B SILICONE RUBBER AND CATALYST IN THEIR  CONTAINERS TO INSURE UNIFORMITY .

MIX RATIO: 20 TO 1 BY WEIGHT IS THE RECOMMENDED MIX RATIO. (ALL OUR KITS ARE BASED ON THIS MIX RATIO)

IT IS IMPORTANT TO ACCURATELY ESTIMATE THE AMOUNT OF MATERIAL THAT NEEDS TO BE MIXED FOR STEPS 4 & 9. DO THIS BY POURING WATER OVER THE ORIGINAL IN THE POURING BOX AFTER STEP 2 & 8 TO THE PROPER LEVEL. DRAIN BACK INTO A MEASURING CUP TO DETERMINE HOW MUCH SILICONE TO MIX.

DRY EVERYTHING BEFORE POURING THE MIXED MATERIALS.

1.) PREPARE A MOLDING BOX OF WOOD, PLASTIC OR METAL. MAKING SURE THERE IS A MINIMUM CLEARANCE OF 1/2 INCH BETWEEN THE EDGES OF THE ORIGINAL AND THE SIDES OF THE BOX, AND A MINIMUM CLEARANCE OF 1/2 INCH BETWEEN THE HIGHEST POINT OF THE ORIGINAL AND THE TOP OF THE BOX SIDES. THE SIDES AND BOTTOM OF THE BOX CAN BE HELD TOGETHER WITH THE SULFUR-FREE CLAY. CAREFULLY SEAL AROUND THE EDGES OF THE BOX WITH THE SULFUR FREE CLAY (#40000). THIS IS NECESSARY TO PREVENT THE SILICONE RUBBER FROM LEAKING OUT.

2.) OVER THE BOTTOM OF THE BOX PLACE A LAYER OF SULFUR FREE CLAY.   MAKE IT THICK ENOUGH TO PRESS IN THE ORIGINAL TO ITS PARTING LINE WITHOUT IT TOUCHING THE BOX. WRAP IN ALUMINUM FOIL OR PLASTIC  WRAP, THE HALF OF THE ORIGINAL THAT WILL BE EMBEDDED IN CLAY. EMBED THE ORIGINAL UP TO THE PRE-ESTABLISHED PARTING LINE.

3.) INSERT ALIGNMENT PEGS (OR CAP NUTS) INTO THE CLAY. USUALLY 4 OF THESE POSITIONED 3/4" IN FROM EACH CORNER WILL ALIGN THE FINISHED MOLD HALVES PROPERLY.

4.) MIX PARTS A AND B ACCORDING TO ABOVE INSTRUCTIONS. BRUSH THE ORIGINAL WITH AN RTV RELEASE AGENT (#42402). ALLOW IT TO DRY THEN BRUSH A THIN COATING OF THE MIXED MATERIAL ON THE ORIGINAL*. THIS WILL REDUCE THE POSSIBILITY OF AIR BUBBLES FORMING AROUND IT.

5.) POUR THE MIXED MATERIAL SLOWLY INTO THE BOX HOLDING THE CONTAINER AS CLOSE TO THE BOX AS POSSIBLE. ALLOW THE MIXTURE TO FILL ALL THE CREVICES AND LEVEL OFF. CONTINUE THE POUR UNTIL THE SILICONE IS AT LEAST 1/2 INCH ABOVE THE HIGHEST POINT OF THE ORIGINAL.

6.) CURE FOR 8 HOURS OR OVERNIGHT AT ROOM TEMPERATURE.

7.) INVERT THE BOX AND DISASSEMBLE IT. REMOVE THE CLAY, FOIL, OR PLASTIC WRAP, AND ALIGNMENT PINS.

8.) WITH THE MOLD NOW UPSIDE DOWN IN THE SILICONE REASSEMBLE THE BOX AROUND IT AND APPLY THE MOLD RELEASE AGENT TO THE EXPOSED AREA OF SILICONE AND ORIGINAL.  WE HAVE RECENTLY FOUND THAT THE MOLD RELEASE CREAM, #5001 USED WITH THE QUICK-SIL IS AN EXCELLENT RELEASE AGENT FOR THE LIQUID RTV MATERIALS.  WHEN SPREAD OVER THE SILICONE AND MODEL, IT RESULTS IN EXCELLENT PARTING OF THE MOLD HALVES.  WE RECOMMEND YOU TRYING THIS PRODUCT TO IMPROVE RESULTS.

9.) FOR SECOND POUR MIX PARTS A AND B PER ABOVE INSTRUCTIONS.

10.) HOLDING THE CONTAINER AS CLOSE TO THE BOX AS POSSIBLE POUR IN THE SILICONE MATERIAL TO FILL ALL THE CREVICES AND LEVEL OFF. CONTINUE POURING UNTIL  THE TOP OF THE SILICONE IS A MINIMUM OF 1/2 INCH ABOVE THE HIGHEST POINT OF THE ORIGINAL.

11.) CURE FOR 8 HOURS OR OVERNIGHT.

12.) DISASSEMBLE THE BOX AND SEPARATE BOTH PARTS OF THE MOLD FROM THE ORIGINAL.

13.) TO PREPARE THE MOLD FOR CASTING DRILL OR CUT IN TWO GATES. BOTH GATES SHOULD BE POSITIONED AT AN OBSCURE PLACE ON THE MODEL (EXAMPLE: INTO THE MODEL'S BASE). ONE GATE WILL BE USED FOR POURING IN THE CASTING MATERIAL, WHILE THE AIR WILL ESCAPE THROUGH THE OTHER

* ALL PAINT SHOULD BE REMOVED FROM A MODEL BEFORE ATTEMPTING TO MAKE A MOLD, AS SOME PAINTS HAVE AN ADVERSE EFFECT ON THE SILICONE.

WORKING TIME: 35 TO 45 MINUTES (AT ROOM TEMPERATURE)

CURE TIME: 8 HOURS OR OVERNIGHT (AT ROOM TEMPERATURE)

ALL DATA IS GIVEN AS A GUIDE TO THE USE OF THE ABOVE MATERIAL AND SHALL NOT CREATE ANY WARRANTY OF PERFORMANCE FOR THE ABOVE MATERIAL. THE USER SHOULD EVALUATE MATERIAL FOR THEIR OWN PURPOSES.

Detailed Instructions for making a
TWO PART BLOCK MOLD

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