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In stock
In every order
- Validated cure profile + datasheet for the printers we sell
- Mutual NDA before any file or spec review
Materials, Additive Plus Resins, Engineering, Manufacturing, Resin 3D Printing Materials, SLA 3D Printing Materials · LSPc, DLP, SLA
Additive Plus Castable - 3D Printing Resin
Print the pattern, burn it out clean, cast perfect metal. Engineering-grade castable resin for jewelry, dental and investment casting — stocked in Los Angeles.
- Ash-free burnout — no expansion, no cracked molds
- Fine detail: filigree, crowns, micro-features
- Runs on 405 nm LCD/DLP, LSPc and SLA printers
July special — 2 for the price of 1
Add any two bottles ($80+) and enter code JULY2FOR1 at checkout — you pay for one. Through July 31.
NDA standard
Ships in 1–2 business days
Built for production teams
What your process engineer actually checks
Validated, load-and-print cure profiles
Every resin ships with a tested exposure/cure profile for the printers we sell and a datasheet covering viscosity, cure energy, mechanical properties, and shelf life. Dial the build in once, reorder the same chemistry.
An materials engineer on the line
Questions on layer adhesion, post-cure schedules, elongation, yellowing, or chemical resistance? A materials engineer answers directly. Most replies in under 4 hours, NDA standard.
About this product
July special · through July 31
Two bottles for the price of one
Add any two bottles of Castable Resin to your cart and enter JULY2FOR1 at checkout — you pay for one. Applies to this resin on orders of $80+, while stock lasts.
Print the pattern. Burn it out clean. Cast the metal.
Additive Plus Castable Resin is an engineering-grade photopolymer formulated for lost-wax and investment casting. It replaces carved wax: print intricate, high-resolution patterns on your resin printer, invest them, and burn them out with no ash residue — so the metal captures every detail of the print. Formulated for jewelers, dental labs, watchmakers and engineers who cast small precision parts.
Ash-freeclean, complete burnout
≤ 410 nmruns on 405 nm LCD/DLP & SLA
0.9 %shrinkage
12 moshelf life, sealed
L.A. stock0.5 kg & 1 kg cans
Why casters choose it
Burnout without mold cracks
The resin thermally decomposes into gas — it vaporizes without expansion, so investment molds stay intact and cavities come out clean, with no ash to scrub.
Detail that survives casting
Low viscosity (90–110 mPa·s) lays down consistent layers: fine filigree, sharp prongs, crisp lettering and micro-features carry through to the final metal.
Strong enough to handle
A balance of strength and slight elasticity (Shore 72D, up to 34 % elongation) means patterns survive washing, spruing and handling without snapping.
Consistent batch to batch
Manufactured to a controlled spec, free from inclusions and precipitate — exposure times and results stay predictable from can to can.
How it works
From file to metal in three steps
01Print the patternRun the model on any 405 nm LCD/MSLA, DLP or LSPc printer, or an SLA laser system — the resin cures at wavelengths up to 410 nm.
02Invest & burn outSprue the pattern, invest it, and run a standard burnout cycle. The pattern vaporizes completely, leaving a clean cavity.
03Cast the metalPour gold, silver, bronze or industrial alloys. The casting reproduces the print’s surface and detail.
Applications
Fine jewelry
Rings, pendants, bracelets and signets with intricate detail — custom commissions and small-batch production.
Dental & orthodontic labs
Crowns, bridges, copings and appliances cast with accurate margins.
Watchmaking & micro-parts
Watch faces, casings and small mechanical components with tight features.
Art & industrial R&D
Bronze and silver sculpture, plus investment-cast patterns for functional metal prototypes.
Specifications
Physical and mechanical properties
| Color | Translucent |
| UV curing wavelength | up to 410 nm |
| Dynamic viscosity, 23 °C | 90–110 mPa·s |
| Kinematic viscosity | 90–100 cSt |
| Density, 20 °C | 1155–1175 kg/m³ |
| Shore hardness | 72 D |
| Tensile strength at break | up to 12 MPa |
| Elongation at break | up to 34 % |
| Shrinkage | 0.9 % |
| Odor | Slight |
| Shelf life (sealed, cool & dark) | 12 months |
What you get & how you buy
- 0.5 kg and 1 kg sealed cans, in stock in Los Angeles — add to cart and check out online
- Recommended starting exposure settings and burnout guidance — a starting point you tune on your machine
- Questions on exposure, supports or burnout? A materials engineer answers directly
Before you order: check your printer’s light source — this resin cures at wavelengths up to 410 nm (405 nm LCD/MSLA/DLP/LSPc and SLA laser systems are fine; sources above 410 nm are not). Casting quality also depends on running a proper investment burnout cycle — see our troubleshooting guide.
FAQ
Which printers can run this resin?
Any resin printer with a light source at or below 410 nm: desktop and professional 405 nm LCD/MSLA and DLP machines, LSPc systems, and SLA laser platforms. If you are unsure about your machine, ask us — a materials engineer will confirm compatibility.
How do I get a clean, ash-free burnout?
Follow a standard investment-casting burnout schedule with a full ramp and hold. The resin decomposes into gaseous byproducts and leaves the cavity clean. Common issues and fixes are covered in our investment casting troubleshooting guide.
Is it suitable for fine jewelry with filigree?
Yes — low viscosity and high print resolution preserve fine wires, prongs and textures, and the pattern is elastic enough to survive spruing without breakage. More on the process in our article on castable resin for metal art.
How long does the resin keep?
12 months in the original sealed container, stored cool and dark. Reseal the can promptly after use.
How does the July 2-for-1 offer work?
Add any two bottles of Castable Resin to your cart (order of $80+) and enter code JULY2FOR1 at checkout — the discount takes off the price of one. The offer runs through July 31, 2026, while stock lasts.
Stocking up for a production run or a class? Talk to a materials engineer — quotes for volume orders in 24h.
| Brand | Additive Plus |
| Available colors | Translucent |
| Weight | 1.1 lbs / 0.5 kg, 2.2 lbs / 1 kg |
| Printing Materials | Additive Plus Resins, Resins |
| Technology | LSPc, DLP, SLA |
Don't see your resin?
We formulate and qualify. Custom variants on request.
Need a tuned resin, a filled or castable formulation, or a profile for a printer we don't list yet? Our materials team qualifies custom formulations and prints test specimens before you commit. Typical lead 2–4 weeks.
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From process engineers running Additive Plus Castable - 3D Printing Resin
Unedited feedback from customers who reorder Additive Plus Castable - 3D Printing Resin.
★★★★★
Cure profile loaded straight into our printer and hit spec on the first build. We stopped burning plates on test prints.
MK
Marcus K.
Process Engineer · Industrial Design
★★★★★
Asked about post-cure for a functional part on a Friday. A materials engineer replied Monday with actual elongation data.
PS
Priya S.
R&D Lead · Medical Devices
★★★★★
Batch-to-batch viscosity is identical. Surface finish is repeatable run after run — no resurprises.
DR
Diego R.
Production Lead · Consumer Products
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