UltraTech Crack Filler (White)
A cement-based, squeeze-tube crack paste that closes hairline wall cracks, switchboard gaps and nail holes in about five minutes, no mason, no mixing, no mess.
What is it?
A cement-based, polymer-modified DIY crack-filling paste in a squeeze tube – the white-shade variant of UltraTech’s five-colour Crack Filler range, made for fine cosmetic cracks rather than structural repair.
Where is it used?
Painted interior walls and ceilings – around door and window frames, switchboard cut-outs, false-ceiling joints, and the seam where a wall meets tile, marble, granite or wood; water-resistant enough for minor joints in bathrooms and kitchens.
Why use it?
It closes a hairline crack in minutes without a mason, mixing, or a full repaint, dries in the same white most Indian interiors are already painted, and is upfront about its limits – built strictly for cracks up to 4mm, interior use only.
How is it applied?
Wipe the crack clean and dry, shake the tube, squeeze the paste into the gap through the nozzle, smoothen with the built-in applicator cap, wipe off excess with a damp cloth, and let it cure a full 24 hours before painting over if needed.
About UltraTech Crack Filler (White)
UltraTech Crack Filler (White) is a do-it-yourself, cement-based repair paste for the fine cosmetic cracks that show up in most Indian homes within a year or two of painting – hairline lines around door and window frames, gaps where a switchboard meets the wall, and joints where a false ceiling meets masonry. It ships in a squeeze tube with a nozzle and a smoothening cap, so there is no mixing, no trowel, and no mason call-out for a genuinely five-minute job. The cement base is blended with UltraTech’s Ultra Polymers to hold the paste together as it dries, resist flaking, and bond to painted, plastered or tiled substrate without the shrink-and-crack behaviour plain POP filler or cheap acrylic caulk shows within a season.
The product earns its keep through honesty about scope. It is rated for cracks up to 4mm wide, interior use only, and UltraTech is blunt that it must never be used on structural or load-bearing cracks – that is a job for crack-injection grouts, structural repair mortars, or a structural engineer, not a tube of wall paste. Within that narrow lane, it does exactly what a Delhi NCR flat-owner, painter, or interior contractor needs before a repaint, a resale viewing, or a post-handover snag list: a fast, low-cost, near-invisible fix in the exact white shade most Indian interiors are already painted in.
The technical insight
The formulation sits between a pure cementitious filler and a polymer sealant. Plain cement or POP fillers shrink as they cure and lose adhesion at the crack edge, which is why touch-up patches often show a hairline shadow within months. Pure acrylic or silicone sealants solve the shrinkage problem but do not take wall paint well and stay flexible or glossy against a matte wall. UltraTech’s cement-plus-polymer route gives enough plasticity to be squeezed and tooled like a sealant, while the cementitious component lets it cure to a hard, paintable, wall-like finish that does not yellow or peel at the edges – which is also why the brand rates it peel resistant rather than just crack resistant. The trade-off applies to every cosmetic filler: it has no structural or load-transfer capability, so it stops being appropriate the moment a crack is more than skin-deep.
Where it is used
- Hairline plaster or paint cracks around door and window frames
- Gaps where switchboards and socket cut-outs meet the wall
- False-ceiling gypsum board joints and edge cracks
- Nail and screw holes left after removing frames, curtain rods or shelving
- Wall-to-tile, wall-to-granite and wall-to-marble junction gaps
- Minor gap-filling in bathroom and kitchen wall joints (water-resistant)
- Pre-repaint touch-up filling ahead of a full interior repaint
- Resale or rental flat cosmetic touch-ups before a viewing
Key advantages
- Squeeze-tube application – no mixing, trowel, or mason visit for a five-minute job
- Touch-dry in as little as 30 minutes in dry weather, full cure in 24 hours
- Factory white shade matches most emulsion-painted Indian walls, often skipping a repaint
- Water-resistant, holds up in bathroom and kitchen wall joints, not just dry rooms
- Cures to a paintable, peel-resistant finish rather than staying rubbery like a sealant
- Small 50g and 90g packs keep entry cost low with minimal wastage for a one-room job
- Widely stocked at hardware and cement stores and on Amazon, easy to restock
- Overpaintable with any emulsion interior paint once fully dry, for an exact match
Limitations & considerations
- Rated for cracks up to 4mm wide only – not designed for wider gaps
- Interior use only – must never go on structural, load-bearing, or moving cracks
- Not a substitute for crack-injection grouting or structural repair mortars for genuine RCC or masonry defects
- Only a 6-month working life once opened, versus 24 months unopened
- Small packs are impractical for filling cracks across an entire building – bulk repair systems suit that scale
- As a cosmetic filler it will not stop a crack reappearing if the underlying movement is still active
Selection & best practice
Work on a clean, dry, dust-free surface – let any damp patch dry out fully first, since dampness undermines both adhesion and the water-resistant claim. Shake the tube before use, lay a thin bead rather than overfilling, and smoothen immediately with the cap before it skins over. Give it the full 24 hours before painting, and treat the 4mm, interior-only limit as a hard stop: if a crack is wider, keeps re-opening, or looks structural, escalate to a proper repair specification instead of feathering on more filler.
Specifications
| Base | Cement-based formula with Ultra Polymers |
| Colour range | White, Cream, Light Yellow, Light Blue, Transparent |
| Pack sizes | 50 g and 90 g tubes (coloured variants); 40 g and 70 g (Transparent) |
| Maximum crack width | 4 mm, interior use only |
| Touch-dry time | 30 minutes (dry/hot weather) up to 24 hours (humid weather) |
| Recommended cure before painting | 24 hours |
| Coverage | Up to 37 linear ft per 90 g tube; up to 21 linear ft per 50 g tube (crack 2 mm wide x 1 mm deep) |
| Shelf life | 24 months from manufacture; use within 6 months of opening |
| Water resistance | Water-resistant – suitable for bathroom and kitchen wall joints |
Industry use cases
Residential homeowner
A Gurugram flat owner fills hairline cracks around door frames and switchboards before Diwali touch-up painting, skipping a full paint job.
Interior fit-out contractor
Closes out post-handover snag-list items – false-ceiling joint cracks and nail holes – on a Delhi NCR residential project.
Real estate / resale
A broker preparing a resale apartment for viewings uses it for a fast, invisible cosmetic fix instead of a full repaint.
Facility management
An office facilities team runs routine corridor and cabin wall touch-ups between scheduled repaint cycles.
Kitchen/bathroom renovation
A homeowner seals the gap where a new tile backsplash meets the painted wall in a kitchen refit.
Frequently asked questions
Will the white filler show up as a patch on my painted wall?
Is it fully waterproof, and can I use it in my bathroom?
Can I use this on a crack running through a beam or a structural wall?
How soon can I paint over it?
What’s the difference between this white variant and the transparent one?
Does Space Arc sell single tubes, or only bulk?
How we position UltraTech Crack Filler (White)
UltraTech Crack Filler (White) sits at the consumer/DIY end of UltraTech’s own Building Products range, alongside its Waterproofing Chemicals line (Seal & Dry and Weather Pro systems), Readiplast Pro wall finishing system, and the Tilefixo tile-fixing range – worth knowing if a flat needs more than a cosmetic crack filled. It is not a professional specification product: for structural crack repair, crack injection, or engineered expansion-joint sealants on a live construction site, the market moves to purpose-built systems – UltraTech’s own structural repair mortars, or specification-grade sealant brands such as Fosroc’s Nitoseal polyurethane/polysulphide range for genuine moving expansion joints. Space Arc stocks and specifies both ends of that spectrum, so a project starts with the right product rather than stretching a DIY tube past its design limit.
Related Sealants & Joint Treatment products
Source UltraTech Crack Filler (White) for your project
Authorised distribution, technical advice & professional application across Delhi NCR and Pan-India.