Bonding agents and SBR latex primers

Lanko 751 Lankolatex SBR is a flexible SBR latex additive (Sika/Davco) for Lanko, Davco and general mortar systems — improving adhesion, compressive strength, water-resistance and flexibility. As a bonding agent it is mixed 1:1 with Portland cement as a brush slurry bond coat; it is also a mortar/screed admixture. CONFIRM dosage and pack size against the current Sika AU TDS.

Ardex WPM 405 (Sheltercrete Additive) is an SBR multipurpose concentrated liquid polymer additive that improves bond strength, flexibility and workability of sand/cement mortars and screeds. It is used as a bonding bridge for new-to-old concrete, a slurry coat under renders/toppings, and a sand/cement admix; being water-resistant it can serve as a temporary waterproofing sealer when mixed with cement.

Fosroc Nitobond SBR is a water-resistant SBR polymer additive that improves the strength and adhesion of concrete repair mortars, cementitious floor toppings and screeds, waterproof renders and cementitious slurries, giving improved tensile and flexural properties that allow thin applications. CONFIRM dosage and pack size against the current Fosroc / Parchem TDS.

Mapei Planicrete AC is a one-component concentrated liquid acrylic latex admixture that enhances cementitious repair mortars, plasters, stuccos and toppings. The TDS states it should NOT be used by itself as a bonding agent — it must be mixed with Portland cement and sand (or designated Mapei products) to form a slurry bond coat. CONFIRM dosage, exterior suitability and pack size against the current Mapei Australia TDS.

Fosroc Nitobond EP is a two-component, solvent-free epoxy bonding agent for bonding fresh wet cementitious materials to existing cementitious surfaces, internally and externally. Supplied in pre-weighed units; overlay time 12 h @35 °C / 5 h @45 °C; shelf life 12 months. CONFIRM bond strength, pot life and pack size against the current Fosroc / Parchem TDS.

Sika SikaBond SBR+ is a waterproof SBR latex used as a mortar/screed/render admixture, a primer/sealer (incl. tiling), and a bonding agent. It gives high resistance to salt and chemical permeation and improved frost resistance, and enhances adhesion to dense concrete, steel and tiles. Available in 5 L and 25 L. AU TDS not located online — CONFIRM Australian specification with Sika Australia (a GB TDS is available).

ARDEX WR Prime is a performance-enhancing polymer primer and additive for renders and cement-based products. As a primer it is diluted 1:5 with water to prime dense / low-absorption substrates (allow to dry ≈30 min on dense concrete; 2–3 h when diluted) before render or repair mortar — it is the ARDEX substrate primer/bond coat referenced for ARDEX BR 340 / BR 345 repair mortars and the WR render range (used instead of ARDEX P 51, a flooring primer). As an admixture gauged into cement renders, adhesives, screeds and grouts it significantly enhances bond strength and increases flexibility and working time. The substrate must be clean, firm and free of dust, oil, grease, curing compounds and release agents. CONFIRM pack size and per-use dilution / dry times against the current ARDEX WR Prime TDS.

Ardex BRP 30 EP is a two-component (Part A resin + Part B hardener) epoxy used as a bonding coat for concrete repair mortars. Unlike most epoxy bond coats it can be used where the substrate is likely to remain damp or wet, which suits it to bridges, roads, wharves, loading docks, warehouses and factories. It also acts as an epoxy resin binder for epoxy mortar patching and overlay of interior surfaces by adding graded aggregate. The repair mortar is placed into the bonding coat within its open time. CONFIRM mixing ratio, pot life, coverage, substrate preparation and overcoat window from the current Ardex Australia TDS.