TOOLS
Coverage calculators
Quick coverage estimates for tile adhesive, waterproofing, self-levelling, and primer. Built for the products we stock and the substrates we see across the Hunter region.
Pick the calculator that matches your job. Each one sizes the right product across the SKUs we stock, recommends the pack count to order, and explains the assumptions behind the numbers. Estimates only – call us before you order if the job is unusual.
Tile adhesive calculator
Bags of Mastik, UniLite S1 or Add Flextra. Verified against the current RLA TDS.
Open calculator By area · coats · surfaceWaterproofing calculator
Litres of Gripset 38FC / Betta or RLA WPM. Class III, undertile + balcony.
Open calculator By area · pour thicknessSelf-levelling calculator
Bags of cement-based leveller. 1.6 kg/m² per mm – plus the prep checklist crews skip.
Open calculator By area · substrate porosityPrimer coverage calculator
Litres of Gripset GP / E60 or RLA Universal. Don’t ship a job under-primed.
Open calculatorWHY OURS
Why use the SJ Stickys calculators
Sized to what we stock
Estimates against the specific RLA Polymers and Gripset SKUs we stock – so the recommended pack count is the pack count you can actually walk out with.
Real SKUs · not generic
Pack-aware recommendations
Recommends the smallest pack count that covers the job. Avoid the buying mistake of one big tub when two smaller pails would have been better.
Smart pack-count maths
Built for the Hunter
Hunter substrates skew coastal, sandy, and movement-prone. The coverage rates reflect what we see at the yard – not the optimistic figures in the marketing PDFs.
Local substrate realityNot sure which product? Call us first.
Coverage calculators size the product you’ve already chosen. Picking the right product for the job is a different conversation – and we’d rather have it before you order. Send us a quick product enquiry and we’ll come back with a spec.
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