Technical resources
Guides, comparisons and site case studies on chemistry applied to construction.
07 May 2026 · 8 min read
Mortars R1, R2, R3 and R4: which class do you need according to the repair
Technical guide to choose between the four classes of concrete repair mortars according to UNE-EN 1504-3, with case studies and real dosages.
30 Apr 2026 · 6 min read
How to choose a sealant for outdoor joints: polyurethane, silicone or MS polymer
Comparison between polyurethane, neutral silicone and MS polymer for outdoor joints. Compatibility with substrates, UV durability, allowable deformation and application method.
23 Apr 2026 · 7 min read
Waterproofing of walls: capillary, barrier or polymer — which method according to the pathology
Three families of solutions for three different pathologies: capillary moisture, pressure leaks, and joints in roofs. When to use each one and why they fail when mixed.
16 Apr 2026 · 9 min read
Additives for concrete: types, dosing and compatibilities
Plasticizers, superplasticizers, retarders, accelerators, water repellents and air-entraining agents — what each one does, typical dosing based on cement weight and combinations that do work.
09 Apr 2026 · 6 min read
Release agents for site and precast: which to choose and why the finish matters
The differences between site release agents (in situ) and precast ones affect the finish, the durability of the mold, and the cost per m². Mineral oil, emulsion, synthetic ester, and reactive chemical.