Bathroom Sealant Calculator
Pick the joints to seal, your bead size and silicone type. Get the running metres, the tubes to buy and an indicative cost. Use anti-fungal sanitary silicone in wet zones. Indicative India 2026 — always confirm coverage on the pack.
Your joints & sealant
Wall-floor perimeter auto-fills at 24 ft (2 × [L + W]). Override any length below.
Joints to seal
A 280 ml tube covers about 8.8 running m at a 8 mm bead. Coverage roughly halves as the bead widens. Add 10–15% wastage for gun priming, tooling and off-cuts.
Sealant to buy (with wastage)
0 tubes
about ₹0 for 12.8 running m of 8 mm bead
Total joint length
12.8 m
42 ft over 4 joints
Tubes needed
2
280 ml each
Coverage / tube
8.8 m
@ 8 mm bead
Indicative cost
₹720
₹360/tube
Running metres by joint. Indicative — confirm pack coverage before buying.
Seal it right the first time
Get sealant, primer and application tips for your joints from DesignAI.
Estimates are indicative and round up to whole tubes. Actual coverage depends on joint width and depth, the applicator's technique and the brand's stated yield, so always check the pack. For wet areas, choose an anti-fungal sanitary silicone and let it cure fully before wetting the joint.
Frequently asked questions
- How does this calculator work out how many tubes I need?
- It adds up the running length of every joint you tick — the wall-floor perimeter (auto-filled as twice length plus width), plus the shower, WC, basin, bathtub and window. It treats the bead as a triangular fillet, so the sealant volume is roughly the joint length times half the bead width squared. That volume, plus your wastage percentage, is divided by the tube size to give whole tubes.
- What bead size and wastage should I enter for a bathroom?
- An 8 mm bead suits most standard bathroom joints; use 6 mm for neat, tight gaps and 10 mm for wide or uneven ones. Coverage roughly halves as the bead widens, so the size matters a lot. Keep wastage at about 10 to 15 percent to cover priming the gun, tooling the bead and off-cuts. The room defaults to a typical 5 by 7 foot layout, which you can override.
- Which silicone should I use in wet areas like the shower?
- For the shower, bathtub, WC base and basin, use an anti-fungal sanitary silicone rather than general-purpose, because it resists mould in constantly wet zones. MS polymer hybrids are pricier but paintable and flexible. The tube prices shown are indicative for India 2026 and vary by brand and city, so treat the cost as planning-level only and confirm the stated coverage on the pack before you buy.
Related Guides — Deep-dive reading
Bathroom Leak Repair in India: Find & Fix Common Leaks (2026)
A practical, India-first guide to finding and fixing the everyday bathroom leaks — dripping taps, weeping traps and angle valves, a running cistern, failed silicone seals — plus how to tell a simple fixture leak from a waterproofing failure that needs a professional.
BathroomsBathroom Waterproofing Chemicals in India: Compounds, Admixtures & Sealants
A brand-neutral guide to the integral compounds, crystalline admixtures, acrylic bonding agents, primers and PU/silicone sealants that keep an Indian bathroom dry — what each does, where it goes, dosage and ₹ cost.
BathroomsSealing Around Door Frames: Caulk vs Silicone (India 2026)
Which sealant goes on the frame-to-wall junction — paintable acrylic inside, silicone outside and wet — plus rebate gaskets, threshold seals and monsoon-proofing.
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