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Single-pack cementitious self-levelling floor topping that pours 6–12 mm thick in one go and reaches 20 N/mm² compressive strength within a day.
ALSTRONG FSL 55 is a single-pack, polymer-enhanced cementitious self-levelling floor topping laid at 6–12mm in one pour. Mixed with water on site, the graded cement and aggregate blend turns into a free-flowing mortar that finds its own level and finishes to a clean, chamfered edge. Compressive strength reaches 20 N/mm² within a day and 35 N/mm² at 28 days, with 9 N/mm² flexural strength and the top Class A impact-resistance band under BS 8204 — built for warehouse, light-engineering and car-park floors, including slabs carrying rising damp.
Figures are controlled laboratory results. Actual site performance varies with substrate, temperature, humidity, application method and workmanship — please confirm the current product datasheet before specification.
ALSTRONG FSL 55 is a self levelling floor screed in a single pack, made from polymer-enhanced cement and graded aggregate. You add water on site, and the mix becomes a free-flowing mortar that finds its own level. As a warehouse floor topping it is laid 6–12 mm thick in one pour, by trowel for small repairs or by pump for large areas.
Carries the top Class A impact band under BS 8204 for forklift traffic.
Hardens to 35 N/mm² at 28 days for engineering floors.
Laid 6–12 mm thick in one continuous pour without construction joints.
Still performs over sub-floors that carry rising damp.
Flows out to its own level across an uneven new slab.
Takes foot traffic in 2–4 hours, so refurbishment work moves on quickly.
For an uneven concrete floor fix, each 25 kg bag is added to 4.75 litres of water and mixed with a slow-speed drill at 400–500 rpm. This floor levelling compound reaches 20 N/mm² in a day and 35 N/mm² at 28 days, with 9 N/mm² flexural strength. Foot traffic is possible in 2–4 hours and forklifts within a week. Never add extra water to loosen the mix, and pass a spiked roller over the wet surface straight away to release trapped air.
Armstrong Chemicals supplies ALSTRONG FSL 55 to sites across Telangana, Andhra Pradesh, Karnataka, Kerala and Tamil Nadu, including Hyderabad, Vijayawada, Bengaluru, Kochi and Chennai.
Mixed with water, the graded cement and aggregate blend becomes a free-flowing mortar that runs out level, replacing a trowelled sand-cement screed.
Compressive strength reaches 20 N/mm² within a day, which is why the floor can take forklifts within a week.
It sits in the top impact-resistance band under BS 8204, so the topping stands up to forklift wheels and constant industrial traffic.
Prepare the concrete substrate — grind or shot blast to a sound, dust-free surface
Repair cracks and holes and prime the floor, allowing the primer to dry fully
Add each 25 kg bag to 4.75 litres of water — never add extra water to loosen the mix
Mix with a slow-speed drill (400–500 rpm) and paddle until no lumps or powder streaks remain
Tip the mixed material onto the primed floor and let it run out to level on its own
Apply by trowel for small repairs or straight off a continuous mixer pump for large pours
Pass a spiked roller over the wet surface immediately to release trapped air
Allow 2–4 hours before foot traffic; heavy and forklift traffic within a week
Coverage estimation is not applicable for this product. Please contact our team for application guidance.
Full specifications, application systems, layering guides, and coverage tables.
Request a quote and your nearest Armstrong distributor will contact you directly.
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