UltraTech Crack Filler (Transparent)
A cement-based touch-up paste that clears to near-invisible on marble, wood and tile — fixing hairline cracks up to 4mm without a painter, a putty knife, or a repaint.
What is it?
A ready-to-use, cement-based crack-filling paste in a squeeze tube, formulated to cure from a milky paste into a clear, near-invisible film.
Where is it used?
Interior tile and marble joints, plaster cracks near doors, windows and switchboards, wood-to-wall gaps, nail holes and false-ceiling joints — anywhere a crack under 4mm needs a quick, tidy fix.
Why use it?
A DIY cement patch usually leaves a visible scar; this tube fills the same gap and fades into the surface instead, without hiring a mason for a two-minute job.
How is it applied?
Wipe the crack clean and dry, shake the tube, squeeze the paste in, level it with the cap, and wipe off the excess with a damp cloth. Curing takes 30 minutes to 24 hours depending on humidity, and full transparency develops over about two days.
About UltraTech Crack Filler (Transparent)
UltraTech Crack Filler (Transparent) is UltraTech Building Products’ answer to the cracks that show up in almost every home within a year or two of a fresh coat of paint — hairline gaps at door and window frames, tile grout lines that have opened up, a nail hole where a calendar used to hang. It’s a ready-to-use, cement-based paste sold in a toothpaste-style tube, meant to be squeezed straight into a crack up to 4mm wide, levelled off with the cap, and left to cure. The transparent variant starts out milky white and clears up over roughly two days, which is what makes it useful on marble, granite, wood trim and light-coloured tile, where an ordinary painter’s filler would leave a visible patch behind.
As an authorised UltraTech distributor and applicator across Delhi NCR, Space Arc stocks this alongside UltraTech’s larger building-products range — waterproofing chemicals, Style Epoxy Grout, Readiplast Pro — because most sites need both ends of the spectrum: bulk repair mortar for genuine structural work, and small retail tubes like this one for the cosmetic touch-ups that come up during handover, housekeeping rounds, or a repaint. We say this upfront: it’s a maintenance product, not a specification item. If a site engineer or facility manager finds themselves filling more than a handful of cracks a month, that’s a conversation about the right cementitious repair mortar, not about buying tubes in bulk.
The technical insight
The chemistry here is simpler than the name suggests: a polymer-modified cementitious paste, not an epoxy or PU resin. That’s why it’s peel-resistant and bonds well to masonry, plaster and tile grout, but also why it’s capped at 4mm cracks and interior use only — cement pastes don’t have the elongation to handle a joint that’s still moving, and they aren’t built for UV or standing water. The transparent finish is a formulation trick rather than a different chemistry: the paste stays opaque while its water content is still evaporating out of the film, and it loses that milkiness as it fully dries — which is also why humid weather can stretch the wait from 30 minutes to a full 24 hours before it looks right, and why the manufacturer calls out a two-day window before judging the final, clear appearance.
Where it is used
- Hairline plaster cracks around door and window frames after a new build settles
- Tile and vitrified flooring grout-line touch-ups
- Marble and granite counter or floor joints where colour-matched filler isn’t available
- Wood-to-wall gaps in false-ceiling cornices and panelling
- Nail and screw holes left behind after removing fixtures, mirrors or photo frames
- Gaps around switchboards, conduit boxes and wiring cut-outs
- False-ceiling perimeter cracks and cove joints
- Pre-repaint touch-ups on minor plaster shrinkage cracks
Key advantages
- Cures transparent in about two days, so it blends into marble, wood and light tile without a repaint
- Ready-to-use squeeze tube — no mixing, trowel or wastage
- Touch-dry in as little as 30 minutes in dry weather
- Peel-resistant once cured, unlike ordinary wall putty
- Small 40g/70g packs keep the cost of a one-off touch-up low
- Cement-based chemistry bonds cleanly to masonry, plaster and tile grout
- No specialist tools or applicator skill needed — housekeeping staff can use it as easily as a painter can
- Backed by UltraTech’s pan-India brand and dealer network for easy replacement
Limitations & considerations
- Rated for narrow cracks up to 4mm only — not a structural or load-bearing repair product
- Interior use only; not built for exterior exposure, UV or wet-area waterproofing
- Small pack sizes (40g/70g) make it impractical for anything beyond scattered touch-ups
- ‘Transparent’ means it cures to a clear film, not a guaranteed optical match on every colour or gloss level — test an inconspicuous spot first
- Being cement-based rather than elastomeric, it won’t accommodate joints that keep expanding and contracting
- No IS/BIS standard is published for this SKU — it’s a retail maintenance item, not a specified construction chemical
Selection & best practice
Keep the crack dry and dust-free before you start — even the tube’s cap works as a makeshift spatula to level the paste once it’s in. Apply a thin pass rather than overfilling; excess wipes off easiest while it’s still wet, with a barely damp cloth. If you’re using the transparent variant on a prominent surface like a marble counter or dark wood trim, test it on an unseen corner first and give it the full two days before judging the result — it looks milky at first, and that’s normal. Treat 4mm as a hard limit: if a crack keeps returning after monsoon, or looks like it’s stepping through the plaster rather than sitting on the surface, that’s a structural symptom that needs proper diagnosis, not another tube.
Specifications
| Product type | Cement-based crack filler paste (transparent variant) |
| Maximum crack width | Up to 4 mm |
| Pack sizes (transparent) | 40 g and 70 g squeeze tubes |
| Application area | Interior use only |
| Touch-dry time | 30 minutes (dry/hot weather) up to 24 hours (humid weather) |
| Transparency development | Turns clear approximately 2 days after application |
| Shelf life | 24 months from manufacture; use within 6 months of opening |
| Application method | Direct squeeze from tube; no mixing required |
| Surface performance | Peel-resistant cured film |
Industry use cases
Residential apartments
Touch up hairline plaster cracks around window frames after monsoon settling, before a repaint.
Facility management / housekeeping
Quick-fix nail holes and switchboard gaps during flat handover or turnover cleaning.
Interior contractors
Fill wood-to-wall gaps in false-ceiling cornices without leaving a visible white filler line.
Retail and showroom fit-outs
Seal marble and granite counter seams where the filler needs to stay invisible against the stone.
Individual homeowners
DIY tile-joint and grout-crack repair without calling a mason for a two-minute job.
Frequently asked questions
Can UltraTech Crack Filler (Transparent) be used on exterior walls?
How wide a crack can it fill?
Does the transparent variant really disappear?
How is this different from a silicone or PU sealant?
What’s the shelf life, and how much should I buy?
Can Space Arc supply this alongside bulk waterproofing or repair chemicals for a project?
How we position UltraTech Crack Filler (Transparent)
UltraTech Crack Filler (Transparent) sits at the lightest end of Space Arc’s UltraTech range — a retail touch-up tube, not a specified repair mortar. For real waterproofing coverage on the same wall, pair it with UltraTech’s waterproofing chemicals range or UltraTech Weather Plus; for tile and stone work, UltraTech Style Epoxy Grout and the TileFixo tile-fixing system cover the joints this filler isn’t meant for. When a crack turns out to be structural rather than cosmetic — stepped, recurring after monsoon, or wider than 4mm — that’s a different job altogether, calling for a proper polymer-modified repair mortar or injection grout, the kind of specification work Fosroc’s Renderoc and Nitomortar ranges are known for, rather than anything from a squeeze tube. Space Arc stocks and specifies across both tiers, so the right product gets matched to the right crack instead of one tube being asked to do a mason’s job.
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Authorised distribution, technical advice & professional application across Delhi NCR and Pan-India.