Maintenance and Cleaning of Polyurethane Decoration

Polyurethane decoration products are manufactured from high-density rigid polyurethane with a closed-cell structure. The density ranges between 150-220 kg/m³ (production target ~160 kg/m³), with a standard production target of approximately 160 kg/m³. Because the water absorption rate remains strictly below 1%, the material resists moisture accumulation, preventing rot, mold growth, and internal swelling. Furthermore, rigid polyurethane withstands severe thermal fluctuations ranging from -100 °C / +80 °C without undergoing structural degradation.

Understanding these physical parameters is critical for correct maintenance across diverse European environmental conditions. While the closed-cell foam prevents liquid ingress, surface coatings still require protection from physical abrasion and chemical damage. Routine care ensures that the structural integrity and surface aesthetic of elements such as profiles, cornices, and decorative panels remain uncompromised over extended operational lifespans.

Interior polyurethane decorative elements require periodic cleaning to remove dust, particulate matter, and surface oils. Dusting should be performed using a soft microfiber cloth or a soft-bristle brush to prevent scratching the painted finish. For deeper cleaning, surface wiping with a damp cloth moistened with warm water and a neutral, non-abrasive detergent is recommended.

• Avoid acidic, alkaline, or solvent-based chemical cleaners that can breakdown paint coatings.
• Do not use abrasive scrubbing pads or steel wool on primed or painted polyurethane surfaces.
• Ensure decorative columns are handled carefully, as polyurethane columns are purely decorative and carry no structural load.

After cleaning with mild soapy water, surfaces should be wiped down with a clean, damp cloth to remove detergent residue, then dried with a soft towel. Regular interior care maintains surface appearance without requiring frequent repainting.

Exterior polyurethane decoration elements face exposure to direct solar radiation, precipitation, and environmental pollutants across varying climate zones. Because exterior installations undergo thermal cycling between -100 °C and +80 °C, applying a high-grade UV-resistant exterior paint is mandatory to protect the substrate from ultraviolet degradation and color fading. Regular maintenance requires inspecting joints, sealants, and painted surfaces annually.

When washing exterior elements, low-pressure water sprays or soft sponges combined with pH-neutral soap solutions should be utilized. High-pressure power washing must be avoided, as extreme water pressure can damage paint adhesion or compromise mechanical fastenings. Additionally, inspect the sealant along joints—relying solely on silicone is forbidden; proper polyurethane (PU) assembly adhesives and mechanical screw fixings are required to maintain stability under wind loads and severe weather exposure across international building sites.

Over time, exterior or high-traffic interior polyurethane elements may require repainting or cosmetic touch-ups. Polyurethane decoration products arrive factory primed; while additional primer is optional during repainting, it can be applied to enhance topcoat adhesion depending on the specific paint formulation chosen. Correct surface preparation is necessary before applying new paint coats to ensure mechanical bonding.

• Fill surface imperfections or screw indents with an appropriate exterior-grade filler or putty.
• Sand repaired areas smooth using 180-220 grit sandpaper once the filler has cured completely.
• Clean away all residual sanding dust thoroughly with a tack cloth or damp towel.
• Apply two coats of high-quality water-based acrylic or UV-resistant exterior paint.

Adhering to correct sanding grit ranges prevents deep scratches while creating adequate surface profile for the new paint layer to bind effectively.

To prevent irreversible surface damage or structural compromise, specific materials and procedures must be strictly avoided during maintenance and repairs. Rigid polyurethane exhibits high chemical resistance, but surface coatings and structural joints remain vulnerable to improper chemical applications and mechanical stress.

• Do not use acetone, thinners, or strong solvent cleaners on polyurethane surfaces.
• Avoid using silicone sealants or silicone-based adhesives for joint repairs or installation touch-ups; only polyurethane assembly adhesives should be used.
• Do not impose physical weight or load-bearing stress onto polyurethane columns or pilasters, as they are non-structural decorative elements.
• Never skip mechanical screw fixings during installation or full-element replacement routines.

Observing these standard restrictions ensures compliance with European construction practices and preserves the integrity of decorative installations engineered by Polure.