The Compleat Sculptor
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Mold Making Compound Index & Mold Making and Casting Accessories & Casting Materials

Tin Based Silicone Mold Compounds (also see Resilpom Tin Silicone Putty)
Click here for Silicone Additives.

Tin-Based Silicones... consist of two components (part B base and part A catalyst), which, after mixing at the proper ratio by weight or volume, cure at room temperature (RTV) to flexible, high tear-strength rubbers. Although the tin-based silicones are usually poured into molds they can be made brushable by adding a thixotropic additive. All these mold rubbers are tin-catalyzed, condensation-cure systems. They are ideal for molds where easy release or high temperature resistance is required. They are recommended for casting polyester, epoxy and polyurethane resins, waxes, polyvinyl compounds, all gypsum products and low-temperature metals. The 70 series tinsils are manufactured by Polytek and the Mold-Max series by Smooth-On. ResilpomŪ is an Italian tin-based silicone mold-making material brought to the U.S. for the first time exclusively by TCS, Inc.
For the special effects industry we also have a variety of products for skins and other creepy things, Click here.

Pourable Mold Starter Kit

This kit comes with:
  • Trial Kit Oomoo30 Molding Rubber
  • Trial Kit Smooth-Cast 300 Casting Resin
  • 2 oz. Superseal, Ease Release
  • 205 Release Agent
  • How-To Booklet & How-To DVD plus Quick Start Guide
Order #
Price
Buy Me
66843002
$49.99

Mold Max 10
Mold-Max 10 is a great rubber, ideal for molds directly over water clay. It’s high flexibility makes it an ideal rubber for highly detailed and deeply undercut originals. It is also commonly used in the special effects industry.

Mold Max Silicones are new tin-cured silicone rubber compounds that have exceptional tear strength and working properties. Mold Max Silicones cure overnight and feature knotty tear propagation (if the rubber is torn, the tear quickly terminates in a “knot” reducing further mold damage).

Mold Max Silicones will reproduce the finest detail and are suitable for a variety of industrial and art related applications including making molds for reproducing prototype, furniture, sculpture and architectural elements. Mold Max 10 Silicones can be thickened with Thi-Vex II thixotropic additive for brush-on application and accelerated using Accel-T. Mold Max Silicones can be pigmented with Silc Pig Pigments.

Mold Max Silicones can also be used to cast a variety of materials including wax, gypsum, low melt alloys/metals and urethane, epoxy or polyester resins (without using a release agent).

Shore A
Color
Mix Ratio
Pot Life
Cure Time
Made by:
10
Light pink
100A : 10B by wt
45-55 min
24 hrs.
Order #
Size
Weight
Price
Buy Me
66S10A
Quart kit - Mold-Max 10
(contains: 1 qt. part A, 4 oz. part B)
2.2 lbs
$24.99
66S10B
Gallon kit -Mold-Max 10
(contains: 1 gal. part A, 1 pt. part B)
11 lbs
$91.99
66S10C
5 Gallon kit - Mold-Max 10
(contains: 5 gal. part A, 1/2 gal. part B)
55 lbs
$421.99
66S10D
Drum Kit - Mold-Max 10
(contains: 55 gal. part A, 6 gal. part B)
550 lbs
$4034.99

GI-1110
This Silicone's Inc. product yields a soft and durable mold. Acceleratable with Ultrafast catalyst. May be thinned using silicone fluid. GI-1110 is a high tear strength, tin-catalyzed RTV-2 silicone rubber, which was designed for casting polyester parts.

GI-1110 is especially good for molds with deep undercuts and for molds that require flexing for part removal. GI-1110 is not sensitive to inhibition, meaning it will cure at room temperature over virtually any surface. It is easy to mix and de-air, and will cure with only a slight degree of shrinkage. The speed at which the rubber hardens can be accelerated with special activators.

Condensation cure, two-component silicone rubbers are excellent for most general mold making and prototype applications. They are excellent for casting waxes, gypsum, epoxies and other plastics. GI-1110 is extremely useful for those applications where superior elongation and low durometer are required.
Shore A
Color
Mix Ratio
Pot Life
Cure Time
Made by:
5-10
Blue
100B : 10A by wt
1 - 2 hrs.
16 - 18 hrs.
Order #
Size
Weight
Price
Buy Me
1661110A
Quart kit - GI-1110
(contains: 1 qt. part A, 4 oz. part B)
2.2 lbs
$31.99
1661110B
Gallon kit - GI-1110
(contains: 1 gal. part A, 1 pt. part B)
11 lbs
$109.99
1661110C
5 Gallon kit - GI-1110
(contains: 5 gal. part A, 1/2 gal. part B)
55 lbs
$419.99

Mold-Max 20
Mold-Max 20 is a great rubber and unbeatable price wise. A rubber ideal for molds directly over water clay. It’s high flexibility makes it an ideal rubber for highly detailed and deeply undercut originals. Works well a an undercoat for Resilpom®.

Mold Max Silicones are new tin-cured silicone rubber compounds that have exceptional tear strength and working properties. Mold Max Silicones cure overnight and feature knotty tear propagation (if the rubber is torn, the tear quickly terminates in a “knot” reducing further mold damage).

Mold Max Silicones will reproduce the finest detail and are suitable for a variety of industrial and art related applications including making molds for reproducing prototype, furniture, sculpture and architectural elements. Mold Max 20 Silicones can be thickened with Thi-Vex II thixotropic additive for brush-on application and accelerated using Accel-T. Mold Max Silicones can be pigmented with Silc Pig Pigments.

Mold Max Silicones can also be used to cast a variety of materials including wax, gypsum, low melt alloys/metals and urethane, epoxy or polyester resins (without using a release agent).
Shore A
Color
Mix Ratio
Pot Life
Cure Time
Made by:
20
Light pink
100A : 10B by wt
45-55 min
24 hrs.
Order #
Size
Weight
Price
Buy Me
66S20A
Quart kit - Mold-Max 20
(contains: 1 qt. part A, 4 oz. part B)
2.2 lbs
$24.99
66S20B
Gallon kit - Mold-Max 20
(contains: 1 gal. part A, 1 pt. part B)
11 lbs
$91.99
66S20C
5 Gallon kit - Mold-Max 20
(contains: 5 gal. part A, 1/2 gal. part B)
55 lbs
$421.99
66S20D
Drum kit - Mold-Max 20
(contains: 55 gal. part A, 6 gal. part B)
550 lbs
$4034.99

Tinsil 70-25
One of the most popular silicone rubbers, 70-25 is used widely in foundries and studios alike. The medium flexibility of this rubber makes an excellent choice for a wide variety of jobs. It can be used as an undercoat for Resilpom® but take 24 hours to cure.

TinSil® 70 Series rubbers consist of a liquid Part B base and Part A accelerator, which after mixing at the proper ratio by weight, cure at room temperature to flexible, high tear strength, RTV (room temperature vulcanizing) silicone rubbers. All TinSil® 70 Series mold rubbers are tin-catalyzed, condensation-cure systems. They are ideal for molds where easy release or high temperature resistance is needed. They are recommended for evaluation as mold materials for polyester, epoxy and polyurethane resins and waxes.

TinSil® 70-25 cures to Shore A-25 hardness within 24-48 hours. (TinSil® 70-30 is slightly tougher and firmer than TinSil® 70-25.

For Faster Cure - TinSil® FastCat can be used in addition to or in place of any TinSil® Part A for an accelerated demold. For Softer Cure - Silicone Fluid can be added sparingly to any TinSil® System. TinThix for thickening TinSil.

Shore A
Color
Mix Ratio
Pot Life
Cure Time
Made by:
25
Blue
100B : 10A by wt
60 min
24 - 48 hrs.
Order #
Size
Weight
Price
Buy Me
06025
Quart kit - TinSil 70-25
(contains: 1 pt. part A, 4 oz. part B)
1 lbs
$37.99
06026
Gallon kit - TinSil 70-25
(contains: 1 gal. part A, 1 pt. part B)
9 lbs
$148.99
06027
5 Gallon kit - TinSil 70-25
(contains: 5 gal. part A, 1/2 gal. part B)
44 lbs
$448.99

OOMOO 25

OOMOO 25 is a new 1A:1B by volume mix silicone rubber that has better over all properties (tear strength, etc.). OOMOO 25 has a relatively low viscosity and does not require vacuum degassing.

This, plus the 1A:1B by volume mix ratio is a big advantage for the hobby market, novice mold makers, etc. that do not have a scale to properly weigh product or a vacuum pump to de-air standard silicone products.

No Vacuuming – No Scale – Stupid Name… Introducing OOMOO 25. OOMOO 25 is easy to use silicone rubber compounds that features convenient one to one by volume mix ratio (no scale necessary). It has very low viscosity for easy mixing and pouring, and vacuum degassing is not necessary. OOMOO 25 cures at room temperature with negligible shrinkage. OOMOO 25 is a faster version, with a 15 minute pot life and 75 minute cure time. (OOMOO 30 has a 30 minute pot life, with a 6 hour cure time.) This rubber was designed for the novice mold making – OOMOO silicones do not have great tear strength. They are good for making simple one or two piece block molds. If you require high-tear strength silicone, Mold Max Silicones are recommended.

OOMOO 25 is suitable for a variety of art related and industrial applications including making molds for sculpture and prototype reproduction, casting plaster, resin and wax.
Shore A
Color
Mix Ratio
Pot Life
Cure Time
Made by:
30
Light blue
1A : 1B by vol
15 min
75 mins.
Order #
Size
Weight
Price
Buy Me
66OM25A
Pint kit - OOMOO 25
(contains: 1 pt. part A, 1 pt. part B)
2 lbs
$24.99
66OM25B
Gallon kit - OOMOO 25
(contains: 1 gal. part A, 1 gal. part B)
16 lbs
$145.99
66OM25C
5 Gallon kit - OOMOO 25
(contains: 5 gal. part A, 5 gal. part B)
80 lbs
$687.99
66OM25D
Drum kit - OOMOO 25
(contains: 55 gal. part A, 55 gal. part B)
900 lbs
$7,110.99

Mold Max Stroke Brushable Silicone Rubber

Image shows Mold Max Stroke pigmented with red Silc Pig.

Mold Max Stroke is a brushable tin silicone rubber that self-thickens for making fast brush-on molds of almost any model. Properly applied, it will hold a vertical surface and will reproduce the finest detail. Mixed 100A:10B by weight, rubber quickly develops thixotropy and can be applied with a brush or spatula. Working time is 20 minutes, re-coat time is 45 minutes and cure time after the final layer has been applied is 16 hours at room temperature.
Mold Max Stroke silicone will not stick to most surfaces and will cure with negligible shrinkage to astrong, flexible Shore 30A rubber. 4 thin layers is all that is necessary to make a strong and durable production mold for casting wax, gypsum, concrete or resins (urethane, polyester, etc.). Applications include reproducing sculpture, architectural restoration, making candle molds, casting pewter, etc.
Shore A
Color
Mix Ratio
Pot Life
Cure Time
Made by:
30
White
100A : 10B by weight
20 min
16 hrs.
Order #
Size
Weight
Price
Buy Me
66S50A
Quart kit - Mold Max Stroke
(contains: 1 pt. part A, 4 oz. part B)
1 lbs
$29.99
66S50B
Gallon kit - Mold Max Stroke
(contains: 1 gal. part A, 1 pt. part B)
9 lbs
$92.99
66S50C
5 Gallon kit - Mold Max Stroke
(contains: 5 gal. part A, 1/2 gal. part B)
44 lbs
$421.99

MoldRite 25

A high strength, two-component, tin-catalyzed, room temperature cured silicone rubber. It is designed as a 28 Shore A, medium viscosity rubber providing excellent physical properties, long library life and accurate detail reproduction.
Order#

Size
Price
Buy me
631700501
1 pt
$43.99
631700510
1 gal
$329.99

Mold-Max 30
Mold-Max 30 is a great rubber and unbeatable price wise. A rubber ideal for molds directly over water clay. It’s high flexibility makes it an ideal rubber for highly detailed and deeply undercut originals. Works well as an undercoat for Resilpom® Putty.

Mold Max Silicones are new tin-cured silicone rubber compounds that have exceptional tear strength and working properties. Mold Max Silicones cure overnight and feature knotty tear propagation (if the rubber is torn, the tear quickly terminates in a “knot” reducing further mold damage).

Mold Max Silicones will reproduce the finest detail and are suitable for a variety of industrial and art related applications including making molds for reproducing prototype, furniture, sculpture and architectural elements. Mold Max 10, 20 & 30 Silicones can be thickened with Thi-Vex II thixotropic additive for brush-on application and accelerated using FastCat 30.Mold Max Silicones can be pigmented with Silc Pig Pigments.

Mold Max Silicones can also be used to cast a variety of materials including wax, gypsum, low melt alloys/metals and urethane, epoxy or polyester resins (without using a release agent).
Shore A
Color
Mix Ratio
Pot Life
Cure Time
Made by:
30
Pink
100A : 10B by wt
45-55 min
24 hrs.
Order #
Size
Weight
Price
Buy Me
66S30A
Quart kit - Mold-Max 30
(contains: 1 qt. part A, 4 oz. part B)
2.2 lbs
$24.99
66S30B
Gallon kit - Mold-Max 30
(contains: 1 gal. part A, 1 pt. part B)
11 lbs
$91.99
66S30C
5 Gallon kit - Mold-Max 30
(contains: 5 gal. part A, 1/2 gal. part B)
55 lbs
$421.99
66S30D
Drum kit - Mold-Max 30
(contains: 55 gal. part A, 6 gal. part B)
550 lbs
$4034.99
  • Mold Max 30 Accessories
66SC30B
Extra Catalyst Part B 1 Pint
1 lb.
$17.99
66SC30C
Extra Catalyst Part B 1/2 gal
8 lbs
$49.99
66FC30B
FastCat 30 1 Pint
1 lb.
$19.99

GI-1000
This Silicone's Inc. product is the standard for Mold Making Silicone in the industry. Works great for casting urethanes. It is also heat resistant up to 400 F, so you can use it to bake foam latex. Acceleratable with Ultrafast catalyst. May be thinned using silicone fluid.

GI-1000 is a high tear strength, tin-catalyzed RTV-2 silicone rubber, which was designed for casting polyester parts. GI-1000 is not sensitive to inhibition, meaning it will sure at room temperature over virtually any surface. It is easy to mix and de-air, and will cure with only a slight degree of shrinkage. The speed at which the rubber hardens can be accelerated with special activators.

Condensation cure, two-component silicone rubbers are excellent for most general mold making and prototype applications. They are excellent for casting waxes, gypsum, epoxies and other plastics. GI-1000 is extremely useful for those applications where superior mechanical properties are required.

Shore A
Color
Mix Ratio
Pot Life
Cure Time
Made by:
28 - 32
Blue
100B : 10A by wt
1.5 - 2.5 hrs.
16-18 hrs.
Order #
Size
Weight
Price
Buy Me
1661000A
Quart kit - GI-1000
(contains: 1 qt. part A, 4 oz. part B)
2 lbs
$31.99
1661000B
Gallon kit - GI-1000
(contains: 1 gal. part A, 1 pt. part B)
10 lbs
$109.99
1661000C
5 Gallon kit - GI-1000
(contains: 5 gal. part A, 1/2 gal. part B)
50 lbs
$419.99

GI-1000 Translucent
This Silicone's Inc. product is the same as their standard GI-1000 for Mold Making. It is heavily used in the special effects industry due to its ease of pigmentation. It also works just as well for casting urethanes. It's high heat resistance (up to 400 F) offers the ability to bake foam latex. Acceleratable with Ultrafast catalyst. May be thinned using silicone fluid.
Shore A
Color
Mix Ratio
Pot Life
Cure Time
Made by:
28-32
Milky Translucent
100B : 10A by wt
90 min
16-18 hrs.
Order #
Size
Weight
Price
Buy Me
1661000TA
Quart kit - GI-1000 Translucent
(contains: 1 qt. part A, 4 oz. part B)
2 lbs
$29.99
1661000TB
Gallon kit - GI-1000 Translucent
(contains: 1 gal. part A, 1 pt. part B)
10 lbs
$109.99
1661000TC
5 Gallon kit - GI-1000 Translucent
(contains: 5 gal. part A, 1/2 gal. part B)
50 lbs
$419.99

OOMOO 30
OOMOO 30 is a new 1A:1B by volume mix silicone rubber that has better over all properties (tear strength, etc.). OOMOO30 has a relatively low viscosity and does not require vacuum degassing. This, plus the 1A:1B by volume mix ratio is a big advantage for the hobby market, novice mold makers, etc. that do not have a scale to properly weigh product or a vacuum pump to de-air standard silicone products.

No Vacuuming – No Scale – Stupid Name… Introducing OOMOO 30. OOMOO 30 is easy to use silicone rubber compounds that features convenient one to one by volume mix ratio (no scale necessary). It has very low viscosity for easy mixing and pouring, and vacuum degassing is not necessary. OOMOO 30 cures at room temperature with negligible shrinkage. OOMOO 30 has a 30 minute pot life, with a 6 hour cure time. (OOMOO 25 is a faster version, with a 15 minute pot life and 75 minute cure time.) This rubber was designed for the novice mold making – OOMOO silicones do not have great tear strength. They are good for making simple one or two piece block molds. If you require high-tear strength silicone, Mold Max Silicones are recommended.

OOMOO 30 is suitable for a variety of art related and industrial applications including making molds for sculpture and prototype reproduction, casting plaster, resin and wax.
Shore A
Color
Mix Ratio
Pot Life
Cure Time
Made by:
30
Lavender
1A : 1B by vol
30 min
6 hrs.
Order #
Size
Weight
Price
Buy Me
66OM30A
Pint kit - OOMOO 30
(contains: 1 pt. part A, 1 pt. part B)
2 lbs
$24.99
66OM30B
Gallon kit - OOMOO 30
(contains: 1 gal. part A, 1 gal. part B)
16 lbs
$145.99
66OM30C
5 Gallon kit - OOMOO 30
(contains: 5 gal. part A, 5 gal. part B)
80 lbs
$687.99
66OM30D
Drum kit - OOMOO 30
(contains: 55 gal. part A, 55 gal part B)
900 lbs
$7,110.99

Tinsil 70-30

Slightly tougher than the 70-25, this rubber is well suited to larger, less detailed jobs. It is particularly good for low- temperature metal-casting because of its high heat resistance. It can be used as an undercoat for Resilpom® but take 24 hours to cure.

TinSil® 70 Series rubbers consist of a liquid Part B base and Part A accelerator, which after mixing at the proper ratio by weight, cure at room temperature to flexible, high tear strength, RTV (room temperature vulcanizing) silicone rubbers. All TinSil® 70 Series mold rubbers are tin-catalyzed, condensation-cure systems. They are ideal for molds where easy release or high temperature resistance is needed. They are recommended for evaluation as mold materials for polyester, epoxy and polyurethane resins and waxes.

TinSil® 70-30 is slightly tougher and firmer than TinSil® 70-25. (TinSil® 70-25 cures to Shore A-25 hardness within 24-48 hours.

For Faster Cure - TinSil® FastCat can be used in addition to or in place of any TinSil® Part A for an accelerated demold. For Softer Cure - Silicone Fluid can be added sparingly to any TinSil® System. TinThix for thickening TinSil.

Shore A
Color
Mix Ratio
Pot Life
Cure Time
Made by:
30
Beige
100B : 2A by wt
60 min
24 hrs.
Order #
Size
Weight
Price
Buy Me
06030
Pint kit - TinSil 70-30
(contains: 1 oz. part A, 1 pt. part B)
1 lb
$37.99
06031
Gallon kit - TinSil 70-30
(contains: 4 oz. part A, 1 gal. part B)
8.3 lbs
$127.99
06032
5 Gallon kit - TinSil 70-30
(contains: 1 pt. part A, 5 gal. part B)
40.8 lbs
$430.99

Resilpom Liquid

Resilpom Liquid is a low viscosity, 32 Durometer (Shore A), two component, tin catalyzed, room temperature curing silicone elastomer. It is designed as a high strength elastomer with good cured rubber properties, long library life and accurate detail reproduction. Resilpom Liquid can be catalyzed with Resilpom Liquid Fast Cat Blue, and can be made thixotropic with Thixo Additives for brush on or spray molds. Can be thickened with Thi-Vex II and thinned with the silicone oils below. Great for use with Resilpom Putty.

Shore A
Color
Mix Ratio
Pot Life
Cure Time
Made by:
32
Blue
10B : 1A by wt
60 min
6 hrs.
Order #
Size
Weight
Price
Buy Me
89402
1 quart
2.2 lb
$36.99
89410
1 gallon
9.9 lb
$159.99
89444
5 gallons
44 lb
$492.99

Tin-Based Silicone Extras

  • THI-VEX II Silicone Rubber Thixotropic Additive

Thickening agent for Smooth-On silicone rubber for vertical surface application (making brush-on molds). Different viscosities can be attained by varying the amount of THI-VEX® II. THI-VEX® II is added as a small percentage of Part A and must be thoroughly mixed with Parts A and B.

Order #
Size
Price
Buy Me
Made by:
66SC01
1 pt / 1 lb
$18.99

  • TinThix for thickening TinSil®

TinSil 70 Series rubbers can be thickened with TinThix liquid thickener or with Cab-O-Sil® for
brushing on a blanket mold. TinThix is a liquid additive that can be mixed into the Part B before mixing with Part A) to achieve varying levels of thixotropy.
Order #
Size
Price
Buy Me
Made by:
06941
4 oz / .25 lb
$12.99
06942
1 pt / 1 lb
$22.99

  • TinSil® FastCat for faster cure

Use TinSil FastCat in place of any TinSil Part A to accelerate cure and shorten demold time. When using FastCat, the working time is shorter as well, so avoid over-catalyzing. FastCat can be used in a range of 2 to 6 parts per 100 parts B.
Order #
Size
Price
Buy Me
Made by:
066612
4 oz / .20 lb
$19.99
066612A
1 pt / 1 lb
$39.99

  • Accel-T Silicone Rubber Accelerator (fast stuff)
Cure accelerator for Mold Max tin-cured silicones. Important: Thoroughly Pre-mix Accel T with Part B before adding Part A. Be aware that the working time is drastically reduced with the addition of Accel T.
Order #
Size
Price
Buy Me
Made by:
66ACT
1oz / 30g
$14.99

Ultra Fast Catalyst has been formulated to dramatically accelerate the speed at which GI tin-cured RTV silicone rubbers will cure.
Order #
Size
Price
Buy Me
Made by:
166UFCB
1 pt / 1 lb
$24.99

  • Polytek Silicone Fluid
A 50 cps silicone fluid for thinning Polytek TinSil and PlatSil products.
Order #
Size
Price
Buy Me
Made by:
0618972
1 qt / 2 lbs
$24.99

A 100 cps silicone fluid is a water clear, odorless, low viscosity, silicone fluid which was especially designed as a thinner for GI silicone RTV silicone rubber compounds.
Order #
Name
Size
Price
Buy Me
Made by:
166100
SI Silicone Fluid
1 pt / 1 lb
$15.99

  • Smooth-On Silicone Thinner
Silicone Thinner is a non-reactive silicone fluid that will lower the mixed viscosity of tin cure (condensation) or platinum cure (addition) silicone rubber products. Silicone Thinner offers the following advantages:

* A lower mixed viscosity (A+B) means that the rubber will de-air faster when vacuuming.
* Mixed rubber (A+B) will flow better over intricate model detail.
* Silicone Thinner will lower the ultimate shore hardness (durometer) of cured silicone rubber.
* Pot life (working time) is increased in proportion to the amount of Silicone Thinner used.

Disadvantage: Ultimate tear and tensile strength are reduced in proportion to the amount of Silicone Thinner added, however knotty tear properties of the Mold Maxtm series rubbers are unaffected
Order #
Size
Price
Buy Me
Made by:
66STHINA
1 pint
$11.99

  • GI- 2020 - Library Catalyst for GI -1000
This Activator will dramatically increase the library life of GI-1000 molds from approximately two years to at least ten years.
Order #
Name
Product Size
Price
Buy Me
Made by:
1662020B
2020 for 1gal unit
1 pint
$18.99
1662020C
2020 for 5 gal unit
1/2 gallon
$47.99



Although we try to keep the most updated prices on our website, all prices are subject to change.
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