
Hyperseal ® 25 LM-S U polyurethane sealant
Single-component, thixotropic, polyurethane expansion joint (sealing and adhesive).

HYPERSEAL®-25LM-S is a durable, flexible sealant , ideal for concrete, ceramics, metal and glass . It works great in expansion joints, foundations, water tanks and other places exposed to structural movement. It is resistant to water, mold and extreme temperatures , providing long-lasting sealing and protection.
HYPERSEAL®-25LM-S is a low-modulus sealing and adhesive mass based on silylated polyurethane. The bonding occurs as a result of a reaction with air humidity. The product has thixotropic properties. The bonded mass has excellent (50%) accommodation properties. It permanently bonds to almost any type of surface, including those traditionally considered problematic for polyurethane products, such as glass, aluminum, steel, polycarbonates, even without priming.
APPLICATION
HYPERSEAL®-25LM-S is a single-component sealing and adhesive mass used for:
- Sealing joints and expansion joints in concrete ,
- Precast concrete ,
- Industrial floors ,
- Water reservoirs and swimming pools ,
- Joining metal and aluminum panels ,
- Window and door installation ,
- Sealing irrigation channels and drains ,
- Bonding ceramics, glass, granite and marble .
FEATURES AND BENEFITS
- Flexible and durable coating – retains its properties even with large expansion movements (50%).
- Very good adhesion to most substrates – does not require priming.
- Thixotropic formula – facilitates application in various weather conditions.
- Resistance to microorganisms – not susceptible to the growth of fungi and molds.
- Can be applied underwater – ideal for tanks and places exposed to moisture.
- Resistance to extreme temperatures :
- From -40°C to +80°C ,
- Stability in sunlight (>60°C) .
- Very good chemical resistance – can be used in swimming pools, treatment plants and chemical tanks.
CONSUMPTION
- Linear consumption (per 600 ml package):
- Slot 5×5 mm → approx. 24 m
- Slot 10×10 mm → approx. 6 m
- Slot 15×15 mm → approx. 2.7 m
PACKAGING
- 600 ml sausage ,
- 300 ml cartridge .
STORAGE PERIOD
- 12 months in original, tightly closed packaging (5-25°C).
CERTIFICATION
- ISO 9001/14001 & OHSAS 18001 ,
- ISO-11600 (Type F – Class 25LM) ,
- DIN-18540-F, ASTM C920, US Federal Specification TT-S-00230C .
HYPERDESMO SYSTEM application guide
APPLICATION
- Preparation of the substrate:
- The surface must be clean and free of grease, dust and old sealants.
- For absorbent surfaces, MICROPRIMER ™ priming is recommended .
- Application:
- Application method: caulking gun.
- For expansion joints the width to depth ratio should be 2:1 , minimum depth is 10 mm .
- It is possible to use an expansion joint to optimize the layer thickness.
Sealing and bonding of expansion joints
- precast concrete
- concrete granite, marble etc.
- gluing ceramic tiles
- water tanks
- swimming pools
- connecting metal and glass panels
- filling cracks and scratches