Rapid 3DShield Boron Carbide Filament | Neutron Shielding
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Rapid 3DShield Boron Carbide prints non-toxic thermal-neutron shielding on the FFF printer you already have. It is 50–60% boron carbide in a PLA-based binder, and parts absorb neutrons straight off the bed: no debinding, sintering or machining. Made in South Central Wisconsin, USA.
Boron-10 (19.9% of natural boron) absorbs thermal neutrons with a cross-section of about 3,840 barns. At mid-spec loading the calculated thermal-neutron mean free path in a fully dense print is about 0.4 mm, so a few millimetres of wall absorbs nearly all of a thermal beam. Capture products are stable, so the part does not build up long-lived activation.
This item ships within 48 hours of your order, directly from the brand, and shipping is free. You will get a tracking number by email as soon as it is on its way.
We accept all major credit cards, Shop Pay, and the accelerated checkout options shown at the top of the cart. Your card is charged when the order is placed.
Need to change or cancel an order? Email us right away and we'll do our best to help before it ships.
Unused parts can be returned within 30 days in their original packaging. A flat $4.99 return shipping fee applies — email us first and we'll send return instructions.
Received the wrong item or something arrived defective? Contact us right away and we'll make it right with a replacement or full refund, no return fee in that case. Full details on our return policy page.
A real person answers our support email — not a bot. If a part arrives faulty or doesn't fit as described, tell us what happened and we'll make it right.
