1KG Clear Invisible Waterproof Sealant Agent – transparent water-based liquid waterproof coating for indoor and outdoor sealing

The essentials

If you’re dealing with dampness, small leaks, or water seepage around roofs, bathrooms, or exterior wall areas, this 1KG Clear Invisible Waterproof Sealant Agent is designed to work as a transparent waterproofing coating. It’s a liquid, water-based sealant that’s meant to soak into seams, cracks, and other weak spots, then cure into a clear film that helps block air, water, and moisture.

What makes it interesting (on paper) is the “invisible” angle: it’s intended to dry transparent so you’re not left re-doing finishes purely for waterproofing. It also positions itself as non-flammable, non-toxic, and odourless, which is the kind of reassurance people tend to want when applying sealants indoors.

Key features and what you’ll notice

The coating is described as being water-based and formulated with water and rubber. In practice, that matters for two reasons: first, it’s meant to be easy to spread as a liquid coating, second, it’s formulated to form a protective membrane over time.

There’s also an emphasis on durability. The sealant is described as UV stabilised and suitable for both low and high temperatures, which is fairly relevant if you’re waterproofing something exposed to the UK’s changeable weather.

Another “real-life” detail: the film is described as transparent after curing, and it’s claimed not to yellow or accumulate dust. That’s not something you can verify from the label alone, but it’s a sensible direction for anyone who wants protection without wrecking the look of a wall surface.

Still, it’s worth setting expectations. If your surface is heavily damaged or moving, waterproof coatings can be part of the solution, but they’re not always the full fix—prep and suitable repair of the underlying issue still matters.

How it works (and why the curing time counts)

This is a liquid waterproof sealant designed to penetrate gaps first and then form a waterproof layer after it cures. The guidance provided is fairly specific about conditions and timing:

• Apply when the weather is clear and the area is relatively dry (above 10°C/50°F before and after applying).
• Two to three coats are required.
• Let the coating become touch-dry and moisture-free before applying the next layer.
• A waterproof layer is expected after 48–72 hours, and it becomes stronger over time.

So if you’re expecting instant “rain resistance” on day one, that’s the main limitation to keep in mind. For a roof or exterior repair, you’ll want to plan your window so you’re not rushing the curing period.

Where it fits best (use cases)

This transparent waterproof paint/sealant is positioned for both outdoor and indoor areas, with examples including roof leaks, exterior wall cracks, chimneys, pipe leaks, corners, and toilet leaks. It’s also suggested for waterproofing seams of decorative materials like ceramic tiles, marble, and glass.

A practical way to think about it: if you’ve got a bathroom area where water is getting into a seam or a junction (for example around a tiled section or a problem corner), a clear sealing layer can be a straightforward approach—assuming the surface can be prepared properly and the product is applied with the recommended multi-coat method.

For outdoors, it’s framed as a roof sealant for long-lasting protection against moisture and temperature swings, which is useful when you want year-round waterproofing rather than a quick stop-gap.

Coverage and practical planning

You’re getting 1KG per tin/bottle, and the coverage is stated as approximately 15 square feet (1.4 square metres) per 1 kg.

Because two to three coats are required, it’s sensible to plan around that. If you only calculate coverage for one thin coat, you may run short part way through the job. It’s one of those products where the “number of coats” detail affects whether the quantity is right for your surface.

Who it’s for, and who should be cautious

It’s a reasonable match if you want: - A transparent waterproof coating that aims to preserve the decorative look of a wall or surface - A water-based, non-flammable, odourless sealant approach (particularly if you’re working indoors) - A multi-coat waterproofing layer intended to help with leaks and damp areas in roofs, bathrooms, and exterior walls

It may not be the best choice if: - You can’t control drying conditions (the guidance depends on clear weather and a relatively dry environment) - You need rapid waterproofing immediately, because the waterproof layer is described as forming after 48–72 hours - You’re dealing with a structural or severely damaged substrate where a coating alone might not hold

Final verdict

Is it worth it?

This 1KG Clear Invisible Waterproof Sealant Agent is worth considering if your priority is transparent waterproofing for indoor and outdoor seams, cracks, and leak-prone areas, and you’re happy to follow the process: dry conditions, multiple coats, and proper curing time. The “invisible” promise and the claimed non-toxic/odourless nature make it a sensible option for bathroom or visible surfaces where looks matter.

If you’re shopping for a fast, one-coat fix, or you can’t guarantee the recommended temperatures and dryness before and after application, you may want to skip this and look for an approach better suited to urgent or damp conditions.

Mini FAQ

How many coats are needed?

The guidance suggests two to three coats for best results.

How long until it becomes waterproof?

A waterproof layer is described as forming after 48–72 hours, with the waterproofing strengthening over time.

Does it dry clear or tinted?

It’s described as transparent upon curing, aiming to preserve the original decorative effect.

Is it suitable for indoor use?

It’s marketed for both indoor and outdoor environments, and it’s described as odourless and non-toxic.

What area does 1KG cover?

Coverage is stated as approximately 15 square feet (1.4 square metres) per 1 kg, based on the information provided.