Silicone Molds for Epoxy Casting Resin - Resistant to Aggressive Resins
Silicone Molds for Epoxy Casting Resin - Professional Quality Discover our specialized collection of silicone molds for epoxy casting resin . Epoxy resins are known for their aggressive properties against silicone, so we have specially selected grades that offer optimal resistance to these corrosive materials. Why Special Silicone for Epoxy?...
✔ Safe to use on skin
✔ Very good flow ability and self-deaeration
✔ Shore A 20
✔ Easy to meter and mix due to 1:1 ratio
✔ Short curing time at room temperature
✔ Translucent
✔ Easy to color with common colors for special effect applications
✔ Good bonding to top coats like Glatzan, Super Baldiez or similar products
✔ Adjustable in thixotropy with ELASTOSIL® FX Thixo
✔ Adjustable in hardness and tackiness with ELASTOSIL® FX Softener
✔ excellent resistance to casting resins, such as polyurethanes and epoxies
✔ Moderately fluid
✔ fast and shrink-free curing at room temperature
✔ Slightly oil-bleeding
✔ Shore A hardness (approx. 40)
✔ good transparency of the cured rubber
✔ high tear strength
✔ very good fluidity
✔ high reactivity
✔ fast and shrink-free curing at room temperature
✔ average Shore A hardness (approx. 31)
✔ high tear strength
✔ long-term stability of the hardness
✔ High-quality silicone from Wacker
✔ Fast and non-shrink curing at room temperature
✔ Shore A 55
✔ Food safe (FDA / BfR compliant)
✔ High tear strength
✔ Stable mechanical properties
✔ Excellent resistance to casting resins
✔ very good flow
✔ fast and non-shrink cure
✔ medium Shore A hardness (A 37)
✔ high tear strength
✔ long-term stability
✔ outstanding resistance to common casting resins
✔ Safe to use on skin
✔ Very good flow ability and self-deaeration
✔ Shore A 28
✔ Easy to meter and mix due to 1:1 ratio
✔ Short curing time at room temperature
✔ Translucent
✔ Easy to color with common colors for special effect applications
✔ Good bonding to top coats like Glatzan, Super Baldiez or similar products
✔ Adjustable in thixotropy with ELASTOSIL® FX Thixo
✔ Adjustable in hardness and tackiness with ELASTOSIL® FX Softener
✔ High-quality silicone from Wacker
✔ Fast and non-shrink curing at room temperature
✔Shore A 43
✔ Transparent
✔High tear strength
✔ Food safe (FDA)
✔ Excellent resistance to casting resins
✔ Very suitable for clear casting resins
✔ Flexible, Strong
✔ Beige
✔ Shore (A) 70 (Hard)
✔ Viscosity 35,000 mPa s
✔ 60 minutes working time
✔ Mixing ratio by weight: 100:10
✔ Good resistance to resins
✔ Flexible, Strong
✔ Beige
✔ Shore (A) 70 (Hard)
✔ Viscosity 35,000 mPa s
✔ 60 minutes working time
✔ Mixing ratio by weight: 100:10
✔ Good resistance to resins
Silicone Molds for Epoxy Casting Resin - Professional Quality
Discover our specialized collection of silicone molds for epoxy casting resin . Epoxy resins are known for their aggressive properties against silicone, so we have specially selected grades that offer optimal resistance to these corrosive materials.
Why Special Silicone for Epoxy?
All epoxy resins are quite corrosive to silicone molds. This means that not every silicone is suitable for epoxy applications. Our selected silicones offer:
Maximum chemical resistance to aggressive epoxy resins
Optimized service life despite the corrosive properties of epoxy
Maintains detail longer than standard silicone
Reduced degradation with repeated use with epoxy
What Happens to Silicone Molds When Using Epoxy?
When using epoxy in a silicone mold, some degradation always occurs:
Loss of gloss: The mold will quickly lose its gloss after the first few castings.
Surface damage: After a few castings the mold will "burn" in some places
Material Weakening: The silicone mold becomes brittle and crumbly in affected areas
Finite life: Each silicone mold has a limited number of epoxy castings
Factors Affecting Lifespan
The number of casts you can make depends largely on several factors:
1. Type Epoxy Resin:
Slow epoxy resins are usually less aggressive
Fast resins generate more heat and are more caustic
Additives in the resin can influence the aggressiveness
2. Temperature during Curing:
The colder the process, the less corrosive to silicone
Heat significantly accelerates chemical attack
Cooling can extend the life of the mold
3. Volume and Massivity:
Large solid shapes become hot during curing
Heat development makes epoxy extra corrosive
Thin castings are less aggressive
4. Contact time:
The longer the casting remains in the mold, the more deterioration occurs
Rapid demolding reduces damage
Prolonged contact worsens the degradation
Practical Tips for Epoxy Molds
Maximize the life of your silicone mold:
Choose the right silicone: Use our epoxy-resistant qualities
Check the temperature: Work as cool as possible
Minimize contact time: Demold as quickly as safely possible
Use release agent: Reduce mechanical stress during demoulding
Inspect regularly: Check for signs of degradation
Applications of Epoxy in Silicone Molds
Despite the aggressive properties, there are many successful applications:
Jewelry making: Small volumes, limited heat development
Decorative objects: Artistic creations and ornaments
Prototyping: Functional parts and test models
Repair work: Minor repairs and additions
Artworks: Sculptures and artistic castings
Our Recommended Silicones for Epoxy
We specifically select silicones that:
Have increased chemical resistance to epoxy
Provides a longer lifespan when using epoxy
Maintain good detail reproduction despite aggression
Optimal flexibility for easy demolding
For professionals and hobbyists working with epoxy, our silicones offer the best balance between performance and durability. While epoxy is always aggressive to silicone, our grades maximize the number of possible castings.
Important: Epoxy is inherently aggressive to all silicones. The lifespan of any mold is finite. Always test a small amount first to ensure compatibility.
