Additive Plus Resin · SLA Photopolymers

Additive Plus 3D Printing Resins

Five SLA resin families — odorless, precise, and print-ready.

Low-odor, low-viscosity chemistry
Low shrinkage, high precision
Flexible, castable & Formlabs-tuned
For SLA printers up to 410 nm
Proven in our own resin print lab
An engineer matches resin to part

Get a resin quote Call +1 (747) 800-4854

Built in-house

We print with the resins we sell

Formulated — five SLA resin families for every job→Printed — in our own Los Angeles resin lab→Proven — on real customer parts, part after part

Overview

One resin line, tuned for every SLA job.

From fast, odorless prototyping resins to flexible, castable, and Formlabs-tuned formulations — the Additive Plus line covers the range of SLA work in one place.

Every resin is low-odor and easy to post-process, built for SLA and DLP printers with wavelengths up to 410 nm. Not sure which one fits your part? An applications engineer will match the resin to your geometry, tolerance, and finish.

Additive Plus SLA photopolymer 3D printing resin

Additive Plus SLA resins — five families, one workflow.

Additive Plus Simple

Odorless, easy SLA resin — great detail at a fair price.

Low-viscosity Simple resins are easy to print and to post-process, and are renowned for having essentially no odor.

Odorless & easy to use — virtually no smell during printing or finishing.
Great features, fair price — low bending stress combined with low warpage and shrinkage.
Platinum-cure silicone compatible — hard, tough parts for prototyping and decorative models.

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Additive Plus Simple photopolymer resin for SLA 3D printers

Additive Plus Reactive

Low shrinkage, high precision — built for fast prototyping.

Reactive resins deliver low shrinkage with high-precision printing, and their excellent fluidity at wavelengths up to 410 nm cuts print time.

Low shrinkage, high precision — accurate parts even at speed.
Made for rapid prototyping — hard, tough one-offs with no cracking despite high print speed.
Low viscosity, low odor — easy to handle while printing and post-processing.

≤ 410 nm wavelengthFast-print fluidity

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Additive Plus Reactive photopolymer resin for SLA 3D printers

Additive Plus Flex

Flexible, durable, highest-toughness UV resin.

A unique UV-curing resin that stays tough across an extreme temperature range — from −40 °F to 464 °F.

Unmatched properties — flexible, durable and high-toughness; holds from −40 °F to 464 °F.
Withstands lead’s melting point (621.5 °F) — cast tin and lead figures in reusable molds.
Wide applications — model making, tin molding, automotive repair, restoration, and more.

−40 °F → 464 °F serviceUp to 621.5 °F short-term

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Additive Plus Flex flexible UV-curing photopolymer resin

Additive Plus Castable

Castable resin with clean burnout.

High density and viscosity, low thermal expansion, and low ash and residue for reliable investment casting.

Improved burnout performance — low ash and residue for clean casts.
Jewelry & metal casting — accessory manufacturing, restoration, and more.
Great value & fine detail — very low odor, packed in a handy multi-use container.

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Additive Plus Castable photopolymer resin for investment casting

Additive Plus Model FL

Tuned for Formlabs Form 2 — strong, precise, affordable.

Model FL resins were rigorously tested on Formlabs Form 2, and work on any SLA printer with a wavelength up to 410 nm.

Fine-tuned for Form 2 — high strength and precision at a modest price.
Wide applications — prototyping, dental, automotive, gaming, model making, and education.
Pure, stable material — free of inclusions or sediment, with a long shelf life when stored properly.

≤ 410 nm wavelengthFormlabs Form 2 tuned

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Additive Plus Model FL photopolymer resin for Formlabs SLA printers

Applications

What teams print with Additive Plus resins.

Functional prototypingHigh-detail modelsJewelry & investment castingDental modelsBoard-game & tabletop figuresTin & lead moldingAutomotive repairRestoration & antiquesEducationProduct development

Why us

A resin partner — not just a resin shop.

We formulate the Additive Plus resin line for SLA, then print with it every day in our own Los Angeles lab (Gardena, CA). That means a named applications engineer can match the right resin to your part, dial in the print, and back it with real print experience — from the first quote to the finished piece.

New customerFirst-time customers — a free consultation and a no-obligation quote on your first resin order.

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Not sure which resin? We’ll match it to your part.

Tell us about your geometry, tolerance, and finish and an applications engineer replies within 24 hours — with a resin recommendation and a firm quote. NDA on request.

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FAQ

Frequently asked questions

Don’t see your question? Our team responds personally to any inquiry — just ask.

Which Additive Plus resin should I choose?

It depends on your part. Choose Simple for easy, odorless prototyping; Reactive for fast, high-precision printing; Flex for flexible, high-temperature parts and tin/lead molds; Castable for jewelry and investment casting; and Model FL for Formlabs Form 2. Tell us your geometry and finish and an engineer will recommend one.

What printers are these resins compatible with?

All five families are formulated for SLA and DLP printers with wavelengths up to 410 nm. Model FL is additionally fine-tuned for the Formlabs Form 2.

Are the resins low-odor?

Yes. The Simple and Reactive series are renowned for having essentially no odor, and Castable is very low-odor as well — easier to run in a shared workspace.

Can Flex resin really handle high temperatures?

Cured Flex parts hold their properties from −40 °F to 464 °F, and withstand up to the lead melting point (621.5 °F) short-term — which is why it is used for reusable tin and lead casting molds.

How do I order and how much does it cost?

Send us your project through the form or call +1 (747) 800-4854. An applications engineer replies within 24 hours with a resin recommendation and a firm quote.

Do you also print parts in these resins?

Yes. We run an in-house SLA resin print service in Los Angeles, so we can supply the resin, print your parts, or both.