Sazilast 25 (grey label) — polyurethane sealant for facade joints
Polyurethane sealant for facade panel joints; according to the data sheet, not used in roof elements or joints with prolonged water contact.

The classic formulation of the range is designed for medium application temperatures — from −15 to +40 °C — and has a fairly low viscosity. Sazilast 24 Klassik is a two-component polyurethane sealant for moving panel joints in above-ground parts of buildings and for facade cracks. The joint works at a movement of ±25% and at temperatures from −60 to +70 °C, and the predicted service life is 10 conventional years. It is supplied in kits of 16.5, 12 and 6.6 kg.
| Manufacturer | Sazilast (SAZI) — OOO PK “SAZI”, Ramenskoye |
|---|---|
| Type | joint sealants |
| Use | joints and junctions |
| Base | two-component non-shrinking polyurethane sealant (A — polyol, V — polyurethane prepolymer) |
| Colour | white, grey |
| Packaging | kits of 16.5 kg, 12 kg and 6.6 kg |
| Application method | mix components A and V with a low-speed drill at 300–350 rpm for at least 10 min; in cold weather condition to +15…+25 °C before mixing; do not add solvents or water; substrate damp but not wet, cleaned; a compressed polyethylene foam backer rod is placed in the joint (no three-sided adhesion); apply by spatula; working layer from 3 mm to 1/2 of the joint width |
| Application temperature | from −15 to +40 °C |
| Curing | pot life at least 6 h at 23 °C; full cure 7 days at 23 °C |
| Key properties | permissible movement amplitude ±25%; nominal tensile strength at break at least 0.2 MPa; elongation at break at least 300% (on joint specimens); cohesive failure; Shore A hardness after 24 h 20–30; flow not more than 2 mm; density 1.6 g/cm³; dynamic viscosity (0.3 / 13.5 s⁻¹, 25 °C) at least 1150 / not more than 85 Pa·s; service from −60 to +70 °C; predicted service life 10 conventional years (3 mm layer, ±25%) |
| Layer thickness | working layer at least 3 mm, not more than 1/2 of the joint width |
| Consumption | 96 g/linear m (20 mm joint, 3 mm layer) |
| Shelf life | 6 months at −20…+30 °C in undamaged packaging, protected from moisture, dust and direct sunlight |
| Standards | STO 032-37547621-2016; GOST R 59522-2021, classes 1 and 3P; certificate of conformity for “Sazilast 24” (manufacturer OOO PK “SAZI”, production — Ramenskoye) |
Data from the manufacturer’s technical data sheet. The coating system, number of coats and quantity are selected for your project on request.
Polyurethane sealant for facade panel joints; according to the data sheet, not used in roof elements or joints with prolonged water contact.
Two-component polyurethane sealant for panel joints and facade cracks in above-ground parts of buildings; permissible joint movement ±25%.
Free-flowing polysulfide sealant for pouring into horizontal and hard-to-reach joints of roofs, roads, bridges and tunnels; elongation at least 200%.
Ready-to-use polyurethane sealant for panel joints, standing-seam roofs, floor joints and sandwich panels; joint movement ±25%.
Winter version of the facade sealant for panel joints and cracks: applied at temperatures from −20 to +25 °C, brush application permitted.
Thixotropic sealant for vertical and inclined joints of bridges and tunnels under mechanical load; tensile strength at break from 1.5 MPa.