KAPA line White Universal Polyurethane Foam Board (5mm)

The Premium Professional Standard for Crumble-Free Modelling, Solvent-Resistant Structure, and Custom Texture Carving.

KAPA line is the definitive universal board in the high performance KAPA range, widely favoured for professional architectural layouts, product models, and detailed structural mock ups. This premium 5.0mm foam board features a lightweight, rigid polyurethane (PUR) foam core enclosed within matt, white pigmented, clay coated chromo replacement cardboard liners. Engineered for exceptional workability, KAPA line delivers a high density structure that cuts cleanly without crumbling. Unlike standard foam boards, it can be grooved, slotted, mitred, or deeply carved with ease, making it an indispensable material for high precision modelling and pristine design presentations.

Why Professionals Choose KAPA line

• High Density Polyurethane Core: The specialised PUR core is considerably tougher than standard polystyrene alternatives, yielding sharp, perfectly clean, crumble free edges even during highly intricate detail work.
• Solvent Resistance: Because the polyurethane core inherently resists chemical breakdown, you can safely utilise solvent based spray mounts, aerosol paints, and diverse adhesives without risking core melting or structural collapse.
• Advanced Surface Adaptability: The clay coated cardboard liners provide a perfectly smooth, bright white base that integrates seamlessly with other professional mediums such as Bristol card, screen printed boards, and heavy media.

Essential Working Techniques

• Cutting and Grooving: Always utilise a very sharp scalpel or a fresh craft knife blade to prevent dragging or tearing the cardboard liners. To create perfectly sharp angled folds, cut completely through one layer of the cardboard lining and the inner foam beneath it, leaving the opposite outer liner fully intact to act as a clean, living hinge.
• Glue Selection Versatility: Due to the solvent resistant nature of the PUR core, you can safely utilise a vast range of workshop adhesives. This includes standard white PVA glue, heavy duty spray adhesives, universal cements, and cyanoacrylates like Zap super glue for rapid, high strength structural joints.
• Warp Prevention Protocol: If you are painting the surface or laminating it with wet mediums, it is essential to treat both sides of the board simultaneously. Applying paint, emulsion, or water based glue to only one side introduces localised surface tension that will cause the foam board to bow or warp as it dries.
• Creating Hand Carved Textures: Unlike polystyrene alternatives, Kapa Line's rigid core can be deeply impressed, carved, or sanded. You can carefully peel back the top paper layer to reveal the dense bare foam, which can then be distressed with a wire brush, scribed with a dull tool, or indented to simulate highly realistic building textures like brickwork, poured concrete, or weathered stone walls.

Technical Specifications

• Thickness: 5.0mm
• Dimensions: 500 x 700mm
• Colour: Bright White
• Sheet Core: Lightweight PUR (Polyurethane) rigid foam (Solvent resistant)
• Liners: Clay-coated, chrome-replacement cardboard (Matt finish on both sides, white pigmented)

Applications

• Architectural Model Making: Widely recognised as the optimum modelling material for scales ranging from 1:100 to 1:1, perfect for structural walls, internal spatial volumes, and realistic facade simulations.
• Prototyping and Industrial Design: Ideal for creating lightweight yet highly rigid structural mock ups where parts must slot or groove together perfectly without warping under light compression.
• Visual Communication and Advertising: A highly reliable substrate for high resolution digital printing, point of sale signage, display boards, and crisp photographic mounting.
• Film and TV Scenic Design: Exceedingly useful for constructing lightweight set details, camera ready miniature props, and scenic backdrops that require heavy painting or detailed surface texturing.

Choosing Between KAPA Graph and KAPA Line

When selecting between KAPA graph and KAPA line for model making, the core difference comes down to aesthetics and surface finish. Both share the same solvent resistant polyurethane foam core, which cuts cleanly without crumbling. Your choice depends on whether your project requires a premium presentation finish or an economical structural all rounder.