What is SLA Black PU (Cast-Like) resin?
Black PU is a tough, durable SLA resin with cast-urethane-like toughness — it flexes and takes impact rather than shattering. RYSE 3D prints it on the Formlabs Form 4L for smooth, detailed, functional parts, with 40 MPa tensile strength and 79% elongation at break.
How tough is Black PU resin?
Around 79% elongation at break, which is what separates it from a standard rigid resin failing in single figures. Tensile strength is 40 MPa. In practice that means snap-fits, clips and press-fits survive assembly, and a dropped part is far more likely to bounce than crack.
How is Black PU different from a standard rigid resin?
Ductility. A rigid resin is stiffer and holds its shape harder, but it is brittle — features snap rather than flex. Black PU trades some of that stiffness for roughly an order of magnitude more elongation, so it behaves like a cast polyurethane. Where you need maximum stiffness or heat resistance instead, a ceramic-filled or high-temperature resin is the better pick.
What is Black PU resin used for?
Functional prototypes, durable housings and enclosures, snap-fit assemblies, brackets and mounts, rugged end-use parts, casings and covers, consumer product models, impact-tolerant parts, and jigs and fixtures that survive long-term factory use.
How heat resistant is Black PU?
Not very — heat deflection is 70 °C, the lowest of any grade we print. It suits parts at ambient and mild service temperatures. Anything sitting near a motor, power supply or engine bay should move to an FDM grade such as PET-CF at 205 °C or PPA-CF at 192 °C.
What machine do you print SLA on?
The Formlabs Form 4L, with a 353 × 196 × 350 mm build envelope, running in open mode so we are not tied to one supplier’s resin range. Parts are laid out and supported in PreForm, washed on the Form Wash L and post-cured on the Form Cure L, then supports are removed and the part finished by hand — all in-house in Shipston-on-Stour.
What finish does Black PU have?
A deep, uniform black with a smooth SLA surface straight off the machine, printed at 25–100 micron layers. Parts can be sanded, primed or painted in-house for a product-like result. Supports are required for SLA and are removed and finished by hand, so tell us which faces are cosmetic and we’ll orient the build to keep supports off them.
Should I choose SLA Black PU or SLS PA12?
Choose on finish versus geometry. Black PU gives a smoother surface, finer detail and a 0.5 mm minimum wall, so it wins on cosmetic and detailed parts. SLS PA12 needs no supports, handles complex internal geometry, holds far more heat and is the stronger choice for end-use parts. Send the CAD and we’ll recommend one.
Where can I find Black PU material properties and a datasheet?
How do I order Black PU resin parts in the UK?
Upload your CAD to our instant online quote and select SLA Black PU. As a UK 3D printing service bureau we print, finish and inspect every part in-house in Shipston-on-Stour, Warwickshire, and ship UK-wide — from a detailed prototype to a durable production batch.
