Technical articles and engineering insight on insulation and waterproofing
107 articles
Rayston 40W rigid spray polyurethane foam: water-blown, 38–42 kg/m³, λ 0.031 W/m·K, μ ≥ 70, Euroclass E. Mix ratios, R-values and 30W comparison.
Rayston 30W water-blown rigid spray foam: 28–35 kg/m³, λ 0.031 W/m·K, μ ≥ 60, no HFC/HCFC. Mix ratios, site conditions and R-values from the TDS.
Rayston 8W open-cell spray foam: 95% open cells, 8–10 kg/m³, λ 0.038 W/m·K, 40–44 dB sound insulation, CO₂-blown. Full TDS data and R-value table.
Compare Rayston spray polyurethane foam grades: open-cell 8W, water-blown 30W–50W and closed-cell HFO. Density, lambda and closed-cell data from the TDS.
CLT dome waterproofing at Las Arenas, Barcelona: 4,182 m² timber dome with RAYSTON PROOF PU IMPERMAX STRAT, cold-applied PU over PIR.
Engineering guide to lining drinking water tanks with polyurea (Pure Polyurea Rayston): epoxy primer, 1.8–2 kg/m² ≈ 1.9–2 mm, no aliphatic topcoat inside closed tanks, WRAS & EN-1504-2 per Krypton 2026 catalogue.
Impermax Aqua 2K on irrigation and water channels: waterborne two-component polyurethane membrane for wet substrates. Specifier note from Krypton Chemical.
Rayston Prim PU 100 (100% solids polyurethane primer) and Pavistone 2K UV (two-component polyurethane stone binder) with crushed marble at Camping La Ballena Alegre, Girona.
Krypton ProLine PU AL Primer on pipes, Polyurea Activating Primer, spray Polyurea Rayston (hot-spray 100% pure polyurea), and white Colodur as the cool-roof finish.
Rayston Spray Foam HFO 40 (rigid polyurethane foam), Rayston Flex 3040 (polyurethane sealant) and Impermax Polyurea H Flex Alum (hybrid polyurea with aluminium pigments).