PRODUCTS THAT PERFORM
FLOORING SYSTEM
Quick Reference Guide
OUR STORY
Larsen Building Products are the leading manufacturer of professional building products that deliver exceptional performance for all corners of the construction industry.
Founded in 1975 in Antrim, Northern Ireland, the company has grown from its humble beginnings of supplying admixtures to concrete plants into a powerhouse offering a diverse range of high-quality, high-performance products across multiple sectors throughout the UK and Ireland.
As a family run business, Larsen has steadily expanded its product portfolio, which now includes:
Today, Larsen is renowned throughout the construction industry for providing cutting-edge solutions to meet the diverse needs of the professional. 2025 marks a proud milestone in Larsen’s history when the company celebrates 50 years of excellence within the construction industry. Staying true to its core values of professionalism, performance, trust, expertise, reputation, and innovation; these principles have driven the company’s vision:
To provide customers with exceptional service and support while delivering quality products that meet the demands of the ever-evolving construction industry.
SLC 1550 FLEX
SELF LEVELLING COMPOUND
Deep Fill, Fibre Reinforced Universal Renovation Screed. Perfect for Fast Track
3 - 50mm
• POLYMER MODIFIED
• OVERBOARDED TIMBER FLOORS
• SUITABLE FOR UNDERFLOOR HEATING
• 1 PART
SLC 100
Cementitious, self-levelling and smoothing underlayment.
1 Part
SLC 1500
Fast drying, cement-based, self levelling and smoothing underlayment.
1 Part
SLC 2000
Fast-drying, cement-based self-levelling and smoothing screed for concrete floors.
1 Part
SLC 2500
Fast-drying, cement-based self levelling and smoothing topping.
1 Part
LLC 200 2 PART LATEX LEVELLING COMPOUND
• ECO REDUCED CARBON
• PROTEIN FREE
• SUITABLE FOR UNDERFLOOR HEATING
• MOISTURE TOLERANT
• 2 PARTS
2 PART ULTIMATE LATEX
LLC 206NA
Latex levelling compound with superior flow and rapid setting.
2 Parts
20KG 1 (64)
4.5L 4
PRIMADRY
Semi-dry screed cement / binder with rapid drying and controlled shrinkage.
1 Part
Bonded > 25mm
Unbonded > 50mm Floating > 65mm
SLC 3015 FAST
Ultra-rapid setting, Fiberflex™ reinforced, self-levelling and smoothing underlayment.
1 Part
1 (64)
FEATHER EDGE
Quick-drying, trowel applied, flooring skim coat.
1 Part
PRODUCT
SLC 1550 FLEX
EXPLORE OUR FLOOR LEVELLERS:
SLC 100
SLC 1500
SLC 2000
SLC 2500
SLC 3015 FAST
PRIMADRY
SUITABILITY
Fast track domestic & commercial use on difficult substrates. e.g. timber
Ideal for offices, dwellings, schools, hospitals, airports etc.
Underfloor Heating Pour & Pump
Suitable for levelling most common subfloors Pour & Pump
Fast track domestic and commercial situations.
Ideal for offices, dwellings, schools, hospitals, airports, etc.
Suitable for overlaying carpet, ceramic tiles, vinyl, resin coatings etc. Pour & Pump
Fast track commercial and industrial situations
Achieves a hard-wearing level finish for warehouses, factories etc.
Can be over-coated with epoxy coatings to improve abrasion resistance
Underfloor Heating Pour & Pump
Eliminates surface irregularities
Ideal for smoothing internal & external concrete surfaces
Suitable for industrial traffic
Provides exterior wearing surface Pour & Pump
Fast track domestic and commercial areas.
Ideal for offices, dwellings, schools, hospitals, airports etc.
Underfloor Heating Pour
Most rigid surfaces prior to the installation of floor coverings
(e.g. vinyl, carpet & ceramic floor tiles)
Used on sub-floors e.g. sand/cement screed, concrete & wooden floors
Suitable for use in biologically sensitive areas
Underfloor heating Pour
Used to prepare most rigid surfaces prior to the installation of floor coverings such as vinyl
Suitable over most old adhesive residues
Underfloor Heating Pour
Fast track construction and refurbishment projects
Ideal for domestic and commercial areas
Suitable for use in place of traditional semi-dry screed, i.e. unbonded, bonded or floating constructions, and standard or heated screeds
Underfloor Heating Screeded / Pumped
Ideal for small floor areas prior to the installation of resilient floor finishes (carpet and vinyl) rather than applying a self-leveling compound to the entire floor
Suitable for smoothing joints between different surfaces, covering tile grout joints, for use over vinyl tiles, etc. Trowel
LLC 206NA
LLC 200
*NOTE: For
FLOORING CHART
•
PRIMER GRIP 360
Formulated with advanced polymers and special fine aggregate, this hybrid primer is the ultimate mechanical key. Its gritty surface ensures a superior bond.
• RAPID DRYING
• INTERNAL AND EXTERNAL
• FOR COMMON ABSORBENT & NON-ABSORBENT BACKGROUNDS
• TILE OVER OR LEVEL IN 15-20MINS
• 1KG PER 5-10M2
DPM ONE COAT RAPID
• Superior 2 pack epoxy surface applied damp proof membrane
• Ideal for fast-track applications
- walkable in 4 hours
• Allows immediate installation of moisture sensitive floor finishes onto damp concrete and screed
• Single coat application
• Up to 98%RH in one coat
INJECTION RESIN
ACRYLIC PRIMER
• Ready-to-use, water-based polymer emulsion
• For use on porous or difficult substrates
• Use neat for sealing or diluted for priming
• Improved adhesion prior to tiling or screeding
• Coloured to indicate application
NP KEYCOAT
• Ready-to-use
• Use prior to tiling & levelling
• High performance water-based modified polymer
• Smooth non-porous substrates
• Universal primer
• Low viscosity epoxy resin-based crack injection system
• Solvent-free
• Very high strength
• 80 N/mm2
• Bonds to dry and damp surfaces
• Non shrink
• Ideal for repairing small, fine or hairline cracks in reinforced concrete structures
RAPID REPAIR CONCRETE
• Specially formulated cement-based patching / repair compound
• Rapid setting in about 30 minutes
• Large and small repairs
• Up to 150mm depth
• Easy mixing
• Internal & external use
• Ideal for screeds, pavements, manhole bedding and floors
RAPID REPAIR MORTAR
• Very fast setting and drying cementitious patching mortar
• Ideal for floors, stairs, and steps
• Up to 25mm depth
• Internal & external use
• Easy mixing
• 30mins set time
