STRUKTORR ON SITE
Practice and advice from the site — short and clear
PREPARE THE JOINT PROPERLY
Even a quality sealant will not compensate for dust, grease, moisture or a badly shaped joint.
SILICONE, PU OR ACRYLIC?
At first glance silicone, polyurethane sealant and acrylic look alike — gun-applied, filling a joint. They are not interchangeable.
NOZZLE, PRESSURE AND TOOLING
The nozzle is not there to leave sealant on the surface. It has to help the sealant fill the joint and bond well to both of its faces.
SEALING IN THE BATHROOM
Bathrooms and kitchens are among the hardest places for any joint. Here the sealant is permanently exposed to water, humidity, temperature change, soaps, cleaners and soiling.
WORKING CORRECTLY WITH PU MOUNTING FOAM
PU mounting foam is one of the most used products on site — installing doors and windows, filling cavities, penetrations around pipes and cables, thermal and acoustic insulation of joints.
HAND-HELD OR GUN-GRADE PU FOAM?
Both hand-held and gun-grade PU foam can fill, insulate and seal construction voids. The main difference is in how it is applied and how well the quantity is controlled.
HOW TO SEAL A MOVEMENT JOINT
Buildings move. Concrete shrinks, metal expands with temperature change, façade elements move with sun, wind and thermal cycles.
WORKING WITH SEALANTS IN COLD AND DAMP
Working through the cold, damp months is harder not just because the material is cold. The real problem is the combination of a cold substrate, high humidity, condensation and slower curing.
HOW TO SIZE A JOINT
The right width-to-depth ratio decides whether the joint survives the structure moving — and its dimensions are exactly what determines how many packages of sealant you actually need.