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
Estimate bags of tile adhesive by area, tile size, and trowel notch. Covers RLA UniLite S1, Mastik, and Add Flextra across small to large-format tile.
Waterproofing calculator
Size liquid membrane litres by area and coats. Gripset 38FC, Gripset Betta, RLA WPM Class III — wet areas, balconies and podiums.
Self-levelling calculator
Size bags of self-leveller by area and thickness. Includes the substrate-prep checklist most contractors skip.
Primer coverage calculator
Litres of primer by substrate porosity. Gripset GP, Gripset E60, and RLA universal primers.
Why use the SJ Stickys calculators
Sized to what we stock
Most online coverage calculators estimate against generic formulations. Ours work 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.
Pack-aware recommendations
The calculator doesn’t just give you a kilogram or litre estimate — it 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 (and cheaper to break open).
Built for the Hunter
Hunter substrates skew coastal, sandy, and movement-prone. The coverage rates the calculators use reflect what we see at the yard — not the optimistic figures in the marketing PDFs.
Not 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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