AM 128 Brushable RTV Silicone Rubber – 4.4lb Kit

$69.00

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AeroMarine Products AM128 Brushable Silicone Moldmaking Rubber RTV is a two component, room temperature condensation cure silicone material.
The cured rubber has excellent mechanical properties and good shelf-life stability.
This material is an excellent choice for making molds of architectural details, statues, figurines and other applications where a pourable block mold is not feasible.
This material is thixotropic, meaning that it can be applied to a vertical surface.
AM128’s mix ratio is 10:1 by weight and you will need a gram scale to accurately weight out this product.
AM128 is sold by WEIGHT.
The 1/2 gallon kit weighs 4.4 lbs.
The RTV rubber has a durometer of 28 Shore A.

DESCRIPTION
HOW-TO
SHIPPING & RETURNS
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TDS

PRODUCT DESCRIPTION

Features:

AM 128 Brushable Silicone RTV rubber does not require use of a vacuum.
AM 128’s mix ratio is 10:1 by WEIGHT.
High tear strength
Long pot life
Low viscosity
Excellent dimensional stability
6 month shelf life when stored in cool dry place out of direct sunlight in original containers

DO NOT USE ON HUMAN OR ANIMAL SKIN!

Main Applications:

Molds for large and small statues
Molds for polyester, polyurethane and epoxy resin castings
Molds for technical articles and prototypes
Molds for furniture and picture frame replication
AM128 IS NOT for use in ovens!
Do NOT use AM128 with any sulfur based clay or latex gloves

Properties:

Uncured Properties:

Component A:
- Appearance: White
- Viscosity, cps: 15,000
Component B:
- Appearance: White
- Viscosity, cps: 200

Catalyzed Properties (10% cat Pink):

Specific Gravity: 1.25
Pot Life: ~30 Minutes
Tack-free Time: 6-8 Hours
De-mold Time: 16-24 Hours.

Typical Cured Properties (3 days @ 25C):

Durometer: 28
Tensile Strength, psi: >400 psi
Elongation, %: >500%
Tear B, ppi: ~110ppi
Linear Shrinkage: 0.006in/in
Useful Temperature Range: -50F to 450F

Cure Characteristics:

The curing process begins as soon as the catalyst is mixed with the silicone base.
Under normal temperature (25C) and humidity (50% RH) conditions, the material will cure as described in the data above.
Any large change in temperature (+/-5C) or humidity (>60-70%) may alter the cure profile of the material.

Material Compatibility:

This product works with most Epoxy and Urethane resins on the market today, however due to the wide variety of products with different chemistries and formulations, we cannot guarantee that it will work with all of them. Some epoxy resin products will not cure when they come in contact with TIN CURE silicone resin and can only work with Platinum Cure silicone. If you are not sure about your epoxy product’s compatibility with this material, please contact the vendor of your epoxy and ask them about compatibility with Tin Cure silicone, or perform a small test before engaging on a major project.

HOW-TO:

Measuring & Mixing:

Shake the catalyst very vigorously for 60 seconds before weighing it. Weigh parts A and B accurately.
Once you have correctly measured both parts, mix parts A and B together with a plastic or wooden stirring utensil.
Take care to scrape the sides and bottom of the mixing container.
Keep your stirring utensil on the bottom of the container to reduce the amount of air being mixed into the silicone.
Mix for several minutes, scraping the sides and bottom frequently, until the silicone is one uniform color with no streaks.

Applying Brushable RTV Silicone:

Brush a small amount of mixed silicone onto the part for a very thin “detail coat”. This will capture all the fine detail of your part. O
nce the detail coat cures, apply a thicker (about 1/8”) coat of silicone onto your part.
When the silicone has cured, you can pull the mold off your part like a glove.
Brushable silicone molds usually need a mother mold, a hard outer shell that holds the brushable mold in place while you pour your casting resin into your mold.
Mother molds can be made from fiberglass, plaster or specially formulated urethanes.

Silicone RTV mold making rubber may soak into a porous surface like wood or plaster. To prevent sticking, first seal the part with a sealant appropriate to the material.
Generally, silicone RTV mold making rubber does not stick to anything, and nothing will stick to it. The exception is that it will stick to itself, other silicones, silica, and glass. Mold release will prolong the life of your mold by reducing the wear on the mold by making it easier to remove your cast piece.

Cleaning Your Silicone Mold:

Wash your cured silicone mold with warm/hot water and mild liquid dish soap.
Pat dry thoroughly and then let the mold air-dry fully.
Never use any type of abrasive soap, cleaner or pad to clean your silicone mold!

Storing Your Silicone Mold:

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.
  - If your mold has a mother mold, place the mold and piece into the mother 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.

Technical Data Sheets (TDS)

Download

SHIPPING AND RETURNS

Shipping
Via UPS Ground

Returns
We only accept returns of unopened and unused product. Customer must return product within 30 days of receipt. Customer must contact us before returning a product. Customer pays for return shipping. All returns are charged a 15% restocking fee.

**shipping estimates may vary based on product selection and destination and a tracking code will be sent after checkout.

Canadian Customers**

If you are ordering from Canada, additional shipping rates and fees may apply. Please contact one of our representatives for more information. Contact us today!

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Calculators

AM 128 Brushable RTV Silicone Rubber – 4.4lb Kit

Features:

Main Applications:

Properties:

Uncured Properties:

Catalyzed Properties (10% cat Pink):

Typical Cured Properties (3 days @ 25C):

Cure Characteristics:

Material Compatibility:

Canadian Customers**