Izhora BP-G25 sealant — bitumen-polymer sealant for pavement joints

Izhora BP-G25 sealant is poured, heated to +140…+180 °C, into expansion joints of concrete and asphalt concrete airfield pavements, into joints and cracks of roads, and into expansion joints and drainage systems of bridges. The grade is designed for regions where the coldest five-day period is warmer than −25 °C: flexibility is retained down to −27 °C, elongation at −20 °C is at least 426 %, and softening occurs no lower than 90 °C. The sealant withstands 31 thousand loading cycles at 0 °C and complies with GOST 30740-2000. Before pouring, the joint walls are treated with Izhora NP-02 primer, and the filled joint is dusted with mineral material.

Specifications

Manufacturer	Rastro (LAKHTA, SLAVYANKA, Izhora) — ZAO “Rastro”
Type	joint sealants
Use	joints and junctions, bridge structures
Base	one-component hot-applied bitumen-polymer sealant (bitumen, plasticisers, polymer additives)
Colour	black
Packaging	24 kg cardboard drums with polyethylene film or 25 kg cardboard boxes with release film
Application method	remove loose pieces, crumbling concrete and old sealant; clean the joints with a disc brush and compressed air, dry with a gas or infrared torch; treat the walls with Izhora NP-02 primer; remove the packaging (from blocks in boxes — also the release film); heat in kettles with forced agitation to +140…+180 °C without overheating or direct heating; pour with joint-filling machines or pouring cans to a level 3–5 mm below the pavement surface; filling depth to width 1:1…2:1, with a backer rod; after pouring — mineral dusting; traffic — after cooling
Application temperature	surface and air not lower than +5 °C, no precipitation (at lower temperatures — with heated enclosures or heat guns); working temperature +140…+180 °C
Curing	traffic is opened after the sealant has cooled to air temperature and no longer sticks to wheels
Key properties	flexibility temperature not higher than −27 °C; softening point (ring and ball) not lower than 90 °C; tack temperature not lower than 55 °C (with dusting 60 °C); elongation at break at −20 °C at least 426 %; water absorption not more than 0.2 %; climatic zones II…IV; fatigue endurance at 0 °C 31 thousand cycles; UV ageing 1,000 h — weight loss 15 %; heating in kettles +140…+180 °C; compliance with GOST 30740-2000; prolonged contact with organic solvents, oils, highly concentrated acids and alkalis is not recommended
Consumption	0.9 kg/linear m per 20 × 40 mm joint
Shelf life	24 months from the date of manufacture
Standards	TU 5772-009-11149403-2002; compliance with GOST 30740-2000

Data from the manufacturer’s technical data sheet. The coating system, number of coats and quantity are selected for your project on request.