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  3. RTV-2 Silicones
  4. SILISIL RTV PRO-Cast 45
  5. RTV-2 Silicones
Price list: Website 0 CHF Price list
Price list: Website 0 CHF Price list
SILISIL RTV PRO-Cast 45

SILISILRTV-2 silicones

SILISIL RTV PRO-Cast 45

2K silicone Shore A 45 (translucent, mixing ratio 1:1) — Translucent premium casting silicone Shore A 45 for demanding tool shapes.

Cured Color
Translucent
Self-leveling
Yes
Density (g/cm³)
1.1
Uncrosslinked viscosity (mPa·s)
8000

CHF 0.00 / pc.
  • Brand
  • Color cured - Translucent
  • Food contact
  • Shore hardness A (cured)
  • Self-leveling
  • Medical grade
  • Density (g/cm³)
  • Uncrosslinked viscosity (mPa·s)
  • Mixing Ratio
  • Pot life (min)
  • Demolding time (min)
  • Full cure (h)
  • Elongation at break (%)
  • Curing type
  • Electrical Insulation
  • Certificates
  • Container
Your selection SILISIL RTV PRO-Cast 45
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Technical documentation

Technical data sheets

HS Code: 3910.0000

SILISIL RTV PRO-Cast 45 Sample Offer

Technical Data

Typical values, not a specification. The technical data sheet (TDS) is binding.

Product Information

Brand
SILISIL
Mixing Ratio
1:1
Curing type
Addition (Platinum)
Container
1kg+1kg, 5kg+5kg, 25kg+25kg

Physical Properties

Cured Color
Translucent
Self-leveling
Yes
Density (g/cm³)
1.1
Uncrosslinked viscosity (mPa·s)
8000

Electrical Properties

Electrical Insulation
Yes

Curing values

Pot life (min)
12
Demolding time (min)
150
Full cure (h)
24

Product Approvals

Food contact
No
Medical grade
No
Certificates
RoHS, REACH

Mechanical properties

Shore hardness A (cured)
A 45
Elongation at break (%)
370
Keywords
  • SILISIL
  • Silicone
  • RTV-2
  • Swiss warehouse
  • Addition
  • Platinum
  • Prototyping
  • Shore A 45
  • Swiss brand
  • 2K
  • PRO-Cast
  • Restoration

Product Description

SILISIL RTV PRO-Cast 45 is a room temperature vulcanizing 2-component silicone from the PRO-Cast — Industrial Casting Series(Addition (Platinum), translucent, RTV-2) — Translucent premium casting silicone Shore A 45 for demanding tool shapes.

The mixture is prepared in a 1:1 ratio by weight . Pot life at 23 °C is approximately 12 minutes, demolding is possible after approximately 150 minutes, and complete curing takes 24 hours. Temperature resistant from -40 °C to +200 °C.

Key property

Higher final hardness (Shore A 45) with translucent visual inspection — shorter pot life (12 min) and faster demolding (150 min) for higher throughput in toolmaking.

SILISIL RTV PRO-Cast 45 in figures
A 45
Shore Hardness
8'000
mPa·s viscosity
12 min
Pot life @23 °C
370 %
Elongation at break

What makes SILISIL RTV PRO-Cast 45 stand out

High final hardness Shore A 45
High final hardness for demanding tool shapes with high loads and long service life.
Translucent for visual inspection
Air inclusions, mold filling, and the embedded original are visible during processing and demolding.
Short pot life (12 min)
Tear resistance 15 N/mm
High tear resistance — robust against mechanical stress when demolding abrasive materials.
Mixing ratio 1:1 by weight
Simple 1:1 ratio — hand-mixable without a precision scale, ideal for workshops and hobbyists.
Elongation at break 370%
Solid elongation at break — suitable for moderate undercuts with higher form stiffness.

What is SILISIL RTV PRO-Cast 45 used for?

Sophisticated tool designs
Industrial molds with higher mechanical stress and tool-like characteristics — robust for multiple castings with standard materials.
Industrial resin casts
Polyurethane, epoxy and polyester casts in medium series with visual quality control.
Tool master models for subsequent tools
Master models for injection molding steel tools and aluminum machining — geometrically accurate transfer.
Designer studios with visual inspection
High-quality designer replicas with a translucent shape for multi-color casts and visual layer control.
Jewelry wax molds with higher production volume
Goldsmith's wax molds with higher final hardness for more wax castings per mold without loss of detail.
Concrete and stone molds
Medium-sized series for architectural and stone applications with a longer mold lifespan.

Processing

1
Prepare the original
Clean, dry, and dust-free surface at 23 °C — cooler environments significantly extend pot life and curing time.
2
Mix components
Stir base and catalyst thoroughly before use. Weigh out 1:1 by weight. Mix in thoroughly, including container walls and bottom.
3
Vacuum degassing
Briefly degas under vacuum for a pore-free mold — entrapped air is removed and a smooth mold surface is guaranteed.
4
Processing
Pour in a thin stream from approx. 30 cm height — minimal air entrapment.
5
Vulcanize and demold
At 23 °C, demolding is possible after approximately 150 minutes, with complete hardening after 24 hours.
Data Sheets & Safety Data Sheet
Complete TDS and SDS in DE, EN, FR — view or download directly.
To the documents →

Important Notes

Avoid crosslinking inhibitors
Addition system (platinum) — sensitive to sulfur, amine, tin, and phosphorus compounds. Avoid contact with latex gloves and PVC plasticizers.
Storage and Shelf Life
Shelf life of at least 12 months in unopened original container when stored in a dry, cool place (10–25 °C). Consult the SDS before opening.
Available containers
1 kg + 1 kg, 5 kg + 5 kg, 25 kg + 25 kg. Other container sizes available on request.
Compatibility
Compatible with polyurethane, epoxy, and polyester casting resins. For aggressive resins, apply a release agent.

Recommended accessories

SILISIL white petroleum jelly release paste
Universal release agent for polyester, epoxy, and polyurethane casts — protects the silicone mold from aggressive resins and extends mold service life.
To the product →
SILISIL Silicone Remover
Cleaning agent for silicone residues on tools, models, and work surfaces — gentle and effective.
To the product →

Which silicone for which application?

SILISIL RTV PRO-Cast 45 in direct comparison with related products in our range (PRO-Cast — Industrial Casting Series).

PRO-Cast 45
Current Product		 PRO-Cast 33 TL →PRO-Cast 33RD →PRO-Cast 50 →
Shore hardness A45333350
Mixed viscosity8'0007'5007'50020'000
ColorTranslucentTranslucentRedGrey
Pot life @23 °C12202015
Mixing ratio1:11:11:11:1

Frequently asked questions about SILISIL RTV PRO-Cast 45

Practical application and design questions — answered by SILITECH.

SILISIL RTV PRO-Cast 45 is a 2K silicone from the PRO-Cast industrial casting series (Shore A 45, translucent). This translucent premium casting silicone (Shore A 45) is suitable for demanding tool molds and related applications.

At 23 °C, the pot life is approximately 12 minutes and the demolding time approximately 150 minutes. Complete curing takes 24 hours.

SILISIL RTV PRO-Cast 45 is an addition-coating (platinum), translucent system. This addition-coating (platinum) system is sensitive to sulfur, amine, tin, and phosphorus compounds. Avoid contact with latex gloves and PVC plasticizers.

SILISIL RTV PRO-Cast 45 is mixed in a 1:1 ratio by weight (base to catalyst). Homogenize both components separately before mixing, then thoroughly incorporate them – including the container walls and bottom.

SILISIL RTV PRO-Cast 45 achieves a Shore A hardness of 45 (ASTM D 2240), a tensile strength of >3.5 N/mm² (ASTM D 412), an elongation at break of approximately 370% and a tensile strength of 15 N/mm (ASTM D 624).