Taba Squishy Molds & Silicone Guide: Shore 00 Rubber vs PU Foam
Crafters searching for a silicone mold for taba squishy projects often discover too late that standard epoxy resin molds can ruin a batch of liquid rubber. Because taba squishies are cast from ultra-soft, sticky addition-cure silicone rather than rigid resin, pouring liquid silicone directly into an unprimed silicone mold can cause the casting and the mold to fuse into a single solid block.
Before buying molds and two-part liquid rubber, or deciding whether a factory-molded polyurethane (PU) memory foam block is a cleaner fit for your desk, it helps to understand how mold wall materials, undercut geometry, and Shore 00 silicone hardness work together.
Why Choosing a Silicone Mold for Taba Squishy Casting Requires Special Care
Not every craft mold sold online is designed for sticky gel elastomers. Makers who shop for a silicone mold for taba squishy casting choose between two main mold types, each with distinct release rules:
- Rigid Clear Plastic Blister Molds (PETG, ABS, or Polycarbonate): Commercial taba starter kits usually include stiff thermoformed plastic molds shaped like cat paws, toast slices, or waffles. Because liquid silicone does not bond chemically to smooth plastic, cured paws peel out cleanly using warm soapy water without needing chemical release sprays.
- Flexible Silicone Molds (Food-Grade or Craft Silicone): Flexible silicone molds offer deeper detail for multi-layered cakes and animal shapes, but liquid silicone naturally bonds to cured silicone. Unless you coat every crevice of a silicone mold with petroleum jelly or a dedicated silicone-free mold release agent before pouring, your taba squishy will weld permanently to the mold cavity.
Liquid Silicone Chemistry: Shore 00-10 vs 00-30 & Cure Inhibition Risks
Even with the right mold, the tactile bounce of a homemade taba squishy depends on selecting the right two-part platinum-cured liquid silicone:
- Ultra-Soft Shore 00-10 to 00-30 Hardness: Standard hardware-store silicone caulk is far too stiff to squish. Authentic taba silicone is formulated on the Shore 00 gel scale (typically 00-10 to 00-30) and blended with silicone oil softeners so the cured paw stretches like gummy candy and snaps back in one second.
- Trapped Micro-Bubbles on Toe Beans and Details: Because two-part liquid silicone is thick like honey, stirring Part A and Part B whips air pockets into the mix. Without a vacuum chamber or slow high-pour streaming, bubbles rise to the bottom of the mold and leave pitted holes on the paw pads.
- Sulfur and Resin Cure Inhibition: Pouring platinum-cure taba silicone into a fresh 3D-printed UV resin mold or touching the mold cavity with latex gloves poisons the platinum catalyst, leaving the surface permanently wet and slimy.
Taba Squishy Molds & Casting Materials vs Factory PU Foam: 5-Row Matrix
The table below compares five common mold and material combinations across release difficulty, bubble risk, surface finish, and bare-hand playability:
| Mold & Material Setup | Mold & Elastomer Type | Demolding & Release Difficulty | Air Bubble & Defect Risk | Bare-Hand Desk Playability |
|---|---|---|---|---|
| Rigid PETG Plastic Paw Mold | Stiff plastic mold + Shore 00 silicone | Easy (peels out with warm soapy water) | Low on flat paws; moderate on toe pads | Low (tacky surface; needs PVC zip bag) |
| Flexible Silicone Craft Mold | Silicone cavity + Shore 00 silicone | High (fuses forever without release spray) | Moderate (deep crevices trap air pockets) | Low (requires cornstarch or flock coat) |
| Deep-Undercut UV Resin Mold | Rigid resin mold + soft taba silicone | High (narrow necks tear soft gel rubber) | High (uncured resin inhibits platinum cure) | Low (often tears during first demold) |
| DIY Cornstarch & Caulk Putty | Hand-pressed starch + acetic silicone | Moderate (crumbles if starch dries out) | High (uneven curing and vinegar odor) | Moderate (dries stiff, not gel-soft) |
| Factory Aluminum PU Foam Mold | Heated metal mold + open-cell PU foam | Zero DIY work (precision factory skin) | Very low (uniform 8 to 15 sec slow rise) | Very high (dry, bag-free, zero oil or mess) |
Comparing homemade mold setups with factory-molded open-cell PU foam explains why many fidgeters skip liquid chemical pouring and choose ready-to-squeeze PU foam blocks for everyday desk relief.
Factory-Molded Seam-Free PU Foam Butter Squishies in the FunnySquishy Catalog
If you want a crisp, bubble-free rectangular block with a dry exterior skin that never needs mold release spray, cornstarch dusting, or a plastic zip pouch, the FunnySquishy catalog offers four factory-molded slow-rising PU foam butter sets:
The FS-BUTTER-005 description says it is a soft, slow-rising stick-of-butter toy made from dense premium foam, and the spec table names Material/Fill as Dense premium PU foam, size Palm-sized, and age Kids 3+ and adults. The same description gives a supplier reference weight of approx. 45 g and says weight may vary.
FS-BUTTER-005 is listed at 1299 cents, which is 12.99 US dollars, with a compare price of 2449 cents, which is 24.49 US dollars.
For shoppers who want two molded yellow butter sticks so one stays by the computer and the second travels in a work bag, FS-BUTTER-011 is a 2-pack at 1999 cents, which is 19.99 US dollars, with compareCents 3249, which is 32.49 US dollars. The spec table says Material/Fill Soft foam, size Palm-sized, shape Stick of butter, and age Kids 3+ and adults.
If you want three matching sticks for a craft party favor table or family gift box without spending 24 hours waiting for silicone molds to cure, FS-BUTTER-007 is a set of three butter-stick-shaped toys at 2299 cents, which is 22.99 US dollars, with compareCents 3749, which is 37.49 US dollars.
For fidgeters who prefer a wider two-brick rectangular mold in a cool blue colorway, FS-BRICK-P006 is the Blue Butter Brick Squishy 2 Pack at 1999 cents, which is 19.99 US dollars, with compareCents 3749, which is 37.49 US dollars. The description says it takes a full-hand squeeze, folds flat, rises on its own slow schedule, and includes two sticks, for desk, car, and classroom.
Demolding, Bubble Prevention & Surface Care Tips for Silicone and PU Fidgets
Whether you are casting your own gel paw in a mold at home or keeping a factory-molded PU foam block on your desk, three practical habits protect the surface:
- Brush Release Agent Into Every Crevice of a Silicone Mold: Before pouring liquid taba silicone into a silicone mold, brush a thin, even film of petroleum jelly or wax release across the cavity so the two silicones cannot bond together.
- Submerge the Mold in Warm Soapy Water While Demolding: Peeling cured Shore 00 silicone under lukewarm dish-soap water lubricates the edges as they pull away from the mold wall, preventing tears around delicate cat-paw pads.
- Keep Factory-Molded PU Foam Blocks Dry and Unbagged: Unlike homemade silicone toys that must stay sealed in a PVC pouch, open-cell PU foam butter blocks (such as FS-BUTTER-005 and FS-BRICK-P006) breathe air through micro-pores and stay clean with bare-hand use.
Frequently Asked Questions
Can you pour liquid taba silicone into a silicone mold without release spray?
No. Liquid addition-cure silicone naturally bonds to cured silicone rubber; pouring taba silicone into a bare silicone mold without a release barrier (such as petroleum jelly or mold release spray) will fuse your squishy permanently to the mold.
What silicone hardness is used for making taba squishies?
Makers use two-part platinum-cured liquid silicone rubber in the ultra-soft Shore 00-10 to Shore 00-30 gel hardness range, often thinned with extra silicone oil to create a stretchy, marshmallow-soft bounce.
Which FunnySquishy factory-molded PU foam blocks arrive ready for bare-hand play?
All four FunnySquishy slow-rising butter packs arrive precision-molded with a dry, non-sticky surface: the single FS-BUTTER-005 ($12.99 USD / 1299 cents), the 2-pack FS-BUTTER-011 ($19.99 USD / 1999 cents), the Blue Butter Brick 2-Pack FS-BRICK-P006 ($19.99 USD / 1999 cents), and the 3-pack FS-BUTTER-007 ($22.99 USD / 2299 cents).
