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Mold Making Latex Rubber – 5 Gallon

$349.00

AeroMarine Products Natural Liquid Mold Making Latex is natural latex with a solids
content between 68 and 70 percent, which minimizes shrinkage and allows the pick up of fine details.
Our latex mold making rubber is extremely tough, very flexible, and is resistant to tearing.
It is brushed directly onto the pattern, allowed to dry, and then reapplied. This process is continued until the latex mold has reached the desired thickness.
Latex is best for making molds for casting cement, concrete, plaster, hydrocal, or hydrostone and NOT for use on human skin.
It can be used for limited runs of resin castings, but the yield is low.
The 5 gallon size covers 80 square feet at 1/16″ thickness.

PRODUCT DESCRIPTION

Features:

High stability
Good tear resistance
Finished molds have a long library life, when stored properly
Long runs while casting concrete and plaster
Minimal shrinkage
Use within 6 months of purchase
Latex must be stored at 60F to 72F
Do not allow latex to freeze
Our Liquid Latex is preserved with ammonia and has a distinct ammonia odor to it.
This latex is not for use on human skin

Properties:

AeroMarine Products’ Liquid Latex is approximately 68-70 percent
solids.
Latex is a milky white or sometimes slightly grey liquid with medium viscosity. Our liquid latex cures to a beige color.
All latex has a tendency to shrink. AeroMarine Products Liquid Latex,
however, because of its medium solids content, shrinks very little. When molding, allow
for some shrinkage.
Latex has a shelf life of approximately 6 months if kept in a cool place at
60F to 72F. The latex will either turn into a cottage cheese consistency or develop a
putrid odor when it is spoiled.

HOW-TO:

Preparation:

The mold piece should be clean, dry and free of oil and dirt.
Oil clay, wood, stone and glazed ceramics normally do not need to be sealed. Plaster, concrete, water based clay and copper containing items should be sealed with a sealant appropriate to the material to avoid sticking.
- If you are unsure whether you need
  sealer, apply a small amount of latex to the piece, somewhere unobtrusive, like the
  bottom. If the latex sticks or turns dark, then apply sealer.

Applying Latex:

Stir the latex with a paint stick after shipping or storage
Starting from the top of your piece, brush on latex in a thin, even, bubble-free coat. At the bottom, continue out from the base about 2 inches to create a flange.
Each coat must be allowed to dry completely before applying the next coat.
For every coat of latex you apply to your piece, brush on a coat on a spare piece of
cardboard or wood.
- This process will give you a piece of latex that you can touch to see
  if it is dry and also peel up to check the thickness, without disturbing the latex on the
  original.
Apply the latex in alternating directions to reduce shrinkage of the finished mold.
You must apply 15-20 coats of latex for strong, durable mold.
Black rubber powder can be used to extend and thicken the latex, allowing for fewer coats per mold.
- First, apply 4 coats of plain latex to your original, and then add black rubber powder to the latex in a 1:1 ratio (equal parts black rubber powder and latex). Mix well and brush on latex as explained above, allowing each coat to dry before applying the next one.

Cheese cloth, gauze, burlap and other materials are sometimes used to help the latex mold hold its shape.
- After applying your 15-20 coats, drape the material around the object and brush the latex over the material.
- Because this drastically reduces the latex’s ability to stretch, this technique should only be used on simple molds, with no undercuts.
- A mother mold can be made once the mold is finished.
- Common mother mold materials for are plaster and fiberglass.

Finishing Your Latex Mold:

To maximize the strength of the latex mold, allow to it to
fully cure for 72 hours in a warm area before using.
Concrete mold releases are available on-line and in most hardware
stores. A 1% liquid dish soap in water solution or 1 part castor oil in 5 parts denatured
alcohol solution also works as a mold release for latex.

Cleaning & Storing Your Latex Mold:

Clean your latex mold with soap and water and let it air dry.
It is always best to store molds with a piece in them to help them keep their shape.
Place mold and piece in an air tight container and store in a cool, dry area, out of direct
sunlight.

Tips:

DO NOT EVER USE THIS LATEX ON HUMAN SKIN!
Latex “air dries”, like paint, but much thicker. To speed up the drying process, you can use a heat gun to blow warn dry air over the freshly applied latex.
Cheesecloth makes a good reinforcement for a latex mold. After brushing on at least 4 coats of latex, add some cheesecloth to reinforce the mold.
Since it is so flexible, you may want to put the latex mold into a bed of sand so that the mold does not distort when being filled.
When storing your latex mold, leave a casting in it to help the mold to preserve its shape.
To make your latex thicker and to reduce the cost of making a mold, consider adding our black rubber powder. This is an eco-friendly product made from reclaimed rubber tires!
If you must thin the latex, distilled water is preferred, although tap water seems to work.
- Thinning latex is not recommended because it slows the process and increases shrinkage.

REVIEWS

Technical Data Sheets (TDS)

SHIPPING AND RETURNS

Shipping
Via UPS Ground

Returns
We do not accept returns for this item.

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