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?...
A high quality 2-component casting silicone. A fairly soft silicone with good tensile strength. Food-safe and skin-friendly. These silicones are often used in prototyping because the original is visible in the silicone mold. This makes it possible to cut the...
The Silicone Additon Transparant Normal 40 is a 2-component (poly-addition) casting silicone which cures at room temperature to a strong rubber that is relatively hard. The silicones can also be used for food related materials, skin contact projects and even...
The Silicone Addition Transparent 15 Fast is a 2-component (poly-addition) pourable silicone which, very rappidly, cures at room temperature to a quite soft but strong rubber silicone. This is a Skin safe and food grade silicone! These silicones are often...
The Silicone Addition Transparent are a very versatile 2-component (Platinum) Poly-addition pourable silicone which cures at room temperature. These silicones are quite liquid and the results provide a very high tensile strength. This is a skin safe and food grade...
ELASTOSIL® FX platinum-cure silicone rubbers are used to create realistic skin effects in film, television and theater. Use the range of base rubbers, gels and additives to reach astonishing results for: FX make-up / lifecasting, Masks, Body parts /prosthetic effects,...
Elastosil M 4644 is a transparent 2-component silicone with excellent resistance to casting resins. With the Elastosil M 4644 you can make molds with a long lifespan. Particularly suitable for casting resins such as epoxy and polyurethane. This variant sweats...
Pourable, addition hardening, 2 component silicone rubber for pad printingwhich vulcanizes at room temperature. Main application: Making print pads. very good flow high reactivity for fast demolding even if large amounts of silicone fluid are added fast and non-shrink cure at...
Pourable, 2-component silicone, with a Shore A 55 (hard) end result. Very suitable for molds for casting resins such as polyurethane and epoxy.Main application: Making shrink-free molds with excellent reproduction accuracy. This product is intended for the business market. For...
The Wacker Elastosil M 4642 is a two-component casting silicone. This silicone cures at room temperature. These silicones have an outstanding resistance to common casting resins! These silicones are used a lot, especially in prototyping. Special features- very good flow- fast...
ELASTOSIL® FX platinum-cure silicone rubbers are used to create realistic skin effects in film, television and theater. Use the range of base rubbers, gels and additives to reach astonishing results for: FX make-up / lifecasting, Masks, Body parts /prosthetic effects,...
The Wacker Elastosil M 4641 is a two-component casting silicone. This silicone cures at room temperature. These silicones are food safe! These silicones are used a lot, especially in prototyping. Because the original can be seen reasonably well in the...
True Skin 20 - Professional Platinum Silicone Elastomer This is a castable, two-component, addition-curing silicone elastomer system. After mixing parts A and B in the correct proportions, the system will cure at ambient temperature within 24 hours, but the cure...
Description This is a castable, two-component, addition-curing silicone elastomer system. After mixing parts A and B in the correct proportions, the system will cure at ambient temperature within 24 hours, but the cure rate can be accelerated by applying heat....
Platinum SiliconeQM 272 – High-quality casting silicone for professional use Key Features Relatively high hardness for silicone rubber Low shrinkage <0.1% for dimensionally stable results Good fluidity and self-venting during processing Suitable for hard but flexible molds Excellent resistance to...
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.
