Resin keychains, fondant cake toppers, custom name signs. They all start with a silicone letter mold, and the right one makes the difference between crisp edges and mushy corners.
Not every mold holds up. Cheap trays look sharp in photos but lose detail after a few pours, especially on thin sections like the crossbar of an A or the serifs on an M.
Some molds cover the full A-to-Z and 0-to-9 in one tray, while others come in starter kits with 200+ pieces of hardware included. The range is wider than you’d expect.
Below, we break down 10 silicone letter molds tested with epoxy resin, chocolate, and soap to help you pick the right one for your project.
Quick Comparison Chart
| # | Product | Our Rating | ||
|---|---|---|---|---|
| 1 |  |
Silicone Letter Molds for Resin Casting (A-Z, 0-9) | ★★★★☆ | Check Price |
| 2 |  |
IGaiety Backward Alphabet Mold Starter Kit (206 pcs) | ★★★★☆ | Check Price |
| 3 |  |
Actvty Mini Alphabet Resin Molds (3-Pack) | ★★★★☆ | Check Price |
| 4 |  |
Actvty Alphabet Keychain Molds with Hole | ★★★★☆ | Check Price |
| 5 |  |
Nupinta 244-Piece Alphabet Resin Casting Kit | ★★★★☆ | Check Price |
| 6 |  |
YITIAOXIAOYU Silicone Alphabet Resin Molds | ★★★★☆ | Check Price |
| 7 |  |
Actvty Reversed Alphabet Molds with Holes | ★★★★☆ | Check Price |
| 8 |  |
ZQYSING Large Reversed Letter Number Molds | ★★★☆☆ | Check Price |
| 9 |  |
2.5-Inch Individual Letter Molds (26-Pack) | ★★★☆☆ | Check Price |
| 10 |  |
Ocean & Letter Keychain Silicone Mold | ★★★☆☆ | Check Price |
The Full Lineup, Ranked
The biggest differences between these molds come down to letter size, whether holes are pre-made for keychains, and how much extra hardware ships in the box. Some picks are bare molds for experienced crafters; others are full starter kits with resin included.
Each review calls out exactly what you get and where the tradeoffs are.
1. Silicone Letter Molds for Resin Casting (A-Z, 0-9) — Best Overall
Silicone Letter Molds for Resin Casting (A-Z, 0-9)
Full A-Z and 0-9 alphabet set in tear-resistant silicone for keychains, charms, and resin gifts.
Pros
- Full A-Z plus 0-9 in one mold for maximum name/word flexibility
- Tear-resistant silicone survives 100+ pours without losing detail
- Smooth inner walls produce crisp edges on every letter
- Works with epoxy resin, UV resin, soap, wax, and fondant
- Beginner-friendly with easy demolding and quick cleanup
Cons
- Single font style limits design variety
- Mold tray is large and needs flat storage space
This is the one I’d grab if I just needed a single mold that handles everything. You get every letter and number in one tray, so spelling out a full name or date for a keychain batch takes one pour session instead of three.
The silicone is thick enough that corners stay sharp through dozens of pours. It works with epoxy, UV resin, soap, wax, and fondant, so you’re not locked into one craft.
2. IGaiety Backward Alphabet Mold Starter Kit (206 pcs) — Runner Up
IGaiety Backward Alphabet Mold Starter Kit (206 pcs)
206-piece starter kit with reversed letter molds, accessories, and epoxy resin included.
Pros
- Includes epoxy resin so you can start pouring right away
- 206 pieces covers molds, keyrings, eye screws, and drill bits
- Reversed letters read correctly once demolded
- Smooth cavities produce polished front faces
- Great gift kit for beginner resin crafters
Cons
- Included resin is small quantity, you will need more for big projects
- Many small accessories can be overwhelming for first-timers
IGaiety’s kit is aimed at people who want to start pouring resin letters today without hunting for supplies. It ships with the mold, epoxy resin, keyrings, eye screws, and a pin vise drill, all in one box.
The included resin is a small bottle, enough for maybe 10-15 letters before you need to restock. But as a starter bundle for someone who’s never poured resin, it removes every excuse not to try.
3. Actvty Mini Alphabet Resin Molds (3-Pack) — Best Value
Actvty Mini Alphabet Resin Molds (3-Pack)
Three-pack with uppercase, lowercase, and number molds for earrings, pendants, and small jewelry.
Pros
- Three molds cover uppercase, lowercase, and numbers
- Mini size perfect for earrings, pendants, and tiny charms
- Smooth 3D finish on all sides of each letter
- High-quality silicone that is easy to demold and reuse
- Compact storage compared to full-size alphabet trays
Cons
- Mini letters too small for keychains or signage
- Tiny cavities are tricky to fill without bubbles
These are tiny. Like, earring and pendant tiny.
If you’re making jewelry-scale letters for necklaces or small charms, the mini size is exactly right.
You get three molds covering uppercase, lowercase, and numbers. The compact trays store easily in a small craft drawer, and the letters pop out clean with minimal flash.
4. Actvty Alphabet Keychain Molds with Hole
Actvty Alphabet Keychain Molds with Hole
Reversed alphabet molds with pre-drilled holes so you skip the drilling step for keychains.
Pros
- Pre-built holes eliminate post-cure drilling
- Includes 20 gold and 20 silver key rings in the kit
- Reversed design reads correctly on the finished face
- Durable silicone holds up through dozens of resin pours
- Compatible with epoxy, UV resin, and polymer clay
Cons
- Hole placement is fixed, no custom positioning
- Single font option with no style variations
The pre-drilled holes on this mold save a real step. Drilling through cured resin without cracking the letter is genuinely annoying, and this mold skips that entirely.
It comes with 40 keyrings (20 gold, 20 silver) so you can start assembling finished keychains straight out of the mold. The reversed design means the glossy side faces outward on the finished piece.
5. Nupinta 244-Piece Alphabet Resin Casting Kit
Nupinta 244-Piece Alphabet Resin Casting Kit
244-piece kit with reversed letters, numbers, pin vise drill set, and hardware for keychain production.
Pros
- 244 pieces including pin vise and drill bits for finishing
- Reversed mold produces clean readable letters
- Suitable for keychains, house numbers, and jewelry
- Silicone is flexible enough for easy demolding
- Includes jump rings, eye screws, and keyrings
Cons
- Pin vise requires practice to drill straight holes
- Large kit takes up significant workspace
This is the kit for someone who wants to set up a small keychain production line. 244 pieces is a lot of hardware, but the pin vise and drill bits are the standout inclusions since they let you add custom hole placements beyond what the mold provides.
The reversed letters demold with a smooth, polished front face. The silicone is flexible enough to pop letters without cracking thin sections like the middle bar on an A or H.
6. YITIAOXIAOYU Silicone Alphabet Resin Molds
YITIAOXIAOYU Silicone Alphabet Resin Molds
26 letters and 10 numbers in 2-inch size for chocolate, resin, and fondant crafting.
Pros
- 2-inch letter size works for both crafts and cake decorating
- Food-grade silicone safe for chocolate and fondant
- Advanced technology mold holds sharp font detail
- Flexible enough to pop letters out without cracking
- Works with resin, wax, soap, plaster, and concrete
Cons
- Larger 2-inch size uses more resin per letter
- Single tray means pouring one letter at a time
At 2 inches per letter, these are noticeably bigger than most alphabet molds on this list. That size works well for cake toppers and decorative signage where you need letters visible from across a room.
The food-grade silicone means you can pour chocolate or fondant directly without worrying about safety. The tradeoff is each letter uses more resin than the smaller molds, so material costs add up on big batches.
7. Actvty Reversed Alphabet Molds with Holes
Actvty Reversed Alphabet Molds with Holes
Upgraded reversed letter mold with holes for direct keychain assembly, no drilling needed.
Pros
- Each letter has a pre-made hole for instant keychain assembly
- Reversed design gives a smooth polished front face
- Durable silicone resists tearing at thin letter sections
- Smooth interior walls reduce bubble trapping
- Compatible with all standard resin types and UV cure
Cons
- Pre-made holes may not align with all keyring hardware
- Letters are one size only, no scaling options
Very similar concept to the #4 Actvty mold but marketed as an upgraded version. The holes are pre-made, the letters are reversed for a smooth front face, and the silicone is reported to resist tearing at thin serif sections.
If you already own the #4 mold and it’s holding up fine, there’s no reason to switch. But if you’re buying your first keychain letter mold, either one gets the job done.
8. ZQYSING Large Reversed Letter Number Molds
ZQYSING Large Reversed Letter Number Molds
Large reversed A-Z and 0-9 mold with holes for oversized resin keychains and pendants.
Pros
- Large letter size stands out on keychains and bags
- All 26 letters plus 10 numbers in one mold
- Pre-drilled holes save finishing time
- Supports epoxy resin, UV resin, and polymer clay
- Personalize with glitter, dried flowers, or color pigments
Cons
- Large letters use significantly more resin per pour
- Oversized mold needs a big flat workspace
ZQYSING went bigger than most competitors here. The letters are oversized, which makes them stand out on bags, luggage tags, and large-format keychains.
The downside of big letters is big resin usage. Each pour eats noticeably more material than a standard-size mold, so keep that in mind if you’re budgeting supplies for a craft fair batch.
9. 2.5-Inch Individual Letter Molds (26-Pack)
2.5-Inch Individual Letter Molds (26-Pack)
26 individual 2.5-inch letter molds in food-grade silicone for candles, wax, cake, and resin.
Pros
- Individual molds let you pour multiple copies of one letter
- 2.5-inch size is ideal for cake toppers and signage
- Food-grade silicone safe for chocolate and fondant
- Flexible and durable for repeated use
- Works with candle wax, clay, resin, and plaster
Cons
- 26 separate molds take up a lot of drawer space
- No numbers included, letters only
These are individual molds, one per letter, which is a totally different approach from the all-in-one trays. The advantage is you can pour five copies of the letter M at the same time if that’s what you need.
The 2.5-inch size is food-grade, so cake toppers and chocolate letters are fair game. The downside is 26 separate molds take up serious drawer space compared to a single tray.
10. Ocean & Letter Keychain Silicone Mold
Ocean & Letter Keychain Silicone Mold
Ocean-themed reversed letter mold with sea creature accents for beach-style resin keychains.
Pros
- Ocean theme adds unique sea creature and wave designs
- Reversed letters with pre-made holes for keychains
- High-quality silicone that holds fine detail
- Includes keyrings and jump rings in the package
- Fun themed mold for summer craft fairs and gifts
Cons
- Ocean theme limits use to beach-style projects
- Themed cavities take up space that could be more letters
This one’s for the niche crowd. The ocean theme mixes alphabet letters with sea creatures, waves, and shell designs, so the finished keychains have a distinct beach aesthetic.
It’s a fun mold if you sell at coastal craft fairs or want themed party favors. But the sea creature cavities take up space that could’ve been more letters, so it’s less versatile than a straight alphabet tray.
Frequently Asked Questions
Can the same silicone letter mold be used for resin and cake?
Only if the mold is explicitly rated food-grade, which not all of them are. Craft-only molds often use silicone blends that leach into anything acidic or hot enough to melt sugar, so save those for resin, soap, and wax.
How do you get resin letters out of a silicone mold without tearing them?
Wait until the resin is fully cured, since rushing demolding is the number one cause of cracked letters. Flex the mold from the outside edges first to break the seal, then push gently from the back of each cavity.
Why do my letters come out with bubbles or weak corners?
Bubbles form when resin gets poured too fast or the mold has deep, narrow channels that trap air. Pour slowly in a thin stream from one corner and tap the mold against the table for 30 seconds to bring air to the surface. The same slow-pour technique applies to silicone tray molds and other flat resin projects.
What thickness of silicone holds detail best for letter molds?
Thicker silicone walls around 3 to 5mm hold crisp font edges through dozens of pours without warping or tearing at thin letter sections. Thin floppy molds work for occasional cake decorating but get saggy when filled with heavier materials like epoxy or plaster. For fondant letters on cakes, a dedicated silicone fondant mat keeps the workspace non-stick while you position each piece.
Can I make my own silicone letter mold at home?
Yes, with two-part silicone molding putty or pourable mold-making silicone and a set of plastic alphabet stamps as masters. The custom approach lets you match any font or size you want, though the initial material cost is higher than buying a pre-made mold.
How long do silicone letter molds last?
A well-made food-grade letter mold handles 100-plus pours before you notice detail loss or tearing at thin points like serif tips and crossbars. Cheap molds start degrading at 20 to 30 uses, especially with heat-cure resin or aggressive release sprays. The same durability gap appears in silicone cake molds where cheaper silicone tears at the edges first.
Final Thoughts
The full A-Z and 0-9 mold from our #1 pick covers the widest range of projects in a single tray. If you only buy one letter mold, that’s the one.
For total beginners, the IGaiety starter kit removes the supply-hunting step entirely. You get resin, hardware, and the mold in one box, which is genuinely the fastest way to pour your first keychain.
The Actvty mini molds at #3 are the pick for jewelry makers working at earring and pendant scale. Full-size alphabet trays are overkill when your finished pieces are half an inch tall.
Whichever mold you go with, pour slow, tap out the bubbles, and let the resin cure completely before you flex anything out. For holiday-themed letters and ornaments, pair these with Christmas silicone molds for a full seasonal craft lineup.
That single habit is the difference between crisp letters and cracked ones.
