A waterproofing dealer is worth choosing only when the recommendation matches your building defect, substrate, water pressure and installation method—not merely the brand name on a container. By checking authorisation, product documentation, system compatibility, quantity calculations and technical support, you can compare quotations on installed performance rather than bag price.
Key takeaways
- Verify the seller through Astral’s official dealer locator or customer support.
- Match the system to the roof, bathroom, basement, tank or external wall.
- Require coverage calculations, preparation steps and product quantities in writing.
- Compare warranty terms, application support, delivery timing and batch details.
How can you verify that an Astral waterproofing dealer is authorised?
Confirm the outlet through the Astral dealer locator, or contact Astral through its current official customer-support channel. Ask Astral to verify that the seller is an authorised Astral dealer for the specific waterproofing product and your region; a shop displaying Astral packs is not proof of authorisation.
Request a GST invoice showing the dealer’s legal name, GSTIN, address, product name, pack size, quantity, batch number and invoice date. Match every detail with the label, photograph the sealed packs and retain the photographs with the invoice.
| Check | Accept | Reject |
|---|---|---|
| Product documents | Current technical data sheet, safety data sheet, manufacturing date, shelf life and storage instructions for the exact formulation | Old online pack image or “ISI tested” claim without identifying evidence |
| Cement compound | Confirmation of applicable IS 2645 requirements and installation guidance such as IS 3067 | No clear standard or method |
| Test evidence | Report naming the exact product, formulation, batch or test sample and standard | Generic certificate |
| Stock condition | Powder kept dry and off the floor; liquid or resin sealed and within shelf life | Caking, torn or water-damaged bags, phase separation, damaged seals or heat exposure |
| Warranty | Registration process, exclusions and escalation contact | Dealer cannot explain who handles a failed claim |
Ask how Astral warranty claims are registered before paying. A dealer who cannot provide traceability or explain storage is a poor source, even at an attractive price.
Which waterproofing system and product form fit your building location?
Give the dealer a location-specific brief, not a request for a generic “waterproof compound.” Record these facts before product selection:
- Roof slab, terrace or balcony: falls, outlet condition, ponding depth, sunlight exposure, parapet junctions and pipe penetrations.
- Toilet sunken slab, bathroom or wet area: substrate, waterproofing behind tiles, grout, sanitary-ware seals, corner treatment and silicone movement joints.
- Basement or retaining wall: positive- or negative-side water pressure and whether drainage relief exists.
- Tank or reservoir: potable-water contact, substrate and curing condition; request documentation covering that exact service.
- Pipe penetrations, construction joints, honeycombed patches and active leaks: provide separate details instead of accepting a blanket coating.
Match the defect to the product form. The dealer must collect substrate type, crack width and movement status, leakage source, area in square metres, sunlight, ponding and water-pressure direction before recommending material.
| Option | What it does | When it fits |
|---|---|---|
| Integral cement-waterproofing compound | Mixes into concrete or mortar | New concrete or mortar |
| Cementitious, acrylic or bituminous coating | Forms an applied layer | Prepared surfaces with the specified exposure |
| Flexible waterproofing coating | Bridges limited movement | Cracks or joints requiring flexibility |
| Crystalline treatment | Reacts within cement-based material | Suitable concrete subjected to moisture ingress |
| Polyurethane or epoxy waterproofing system | Uses specific primer, mixing and curing | Systems needing their documented chemical and service performance |
| Injection resin | Enters cracks or joints | Localised leakage or crack paths |
| Repair mortar | Rebuilds damaged concrete | Honeycombing, voids and defective patches |
Ask about flexible coating, crystalline treatment, epoxy waterproofing system, injection resin and repair mortar only after identifying the failure mechanism.
What should a dealer’s technical quotation calculate?
A credible quotation starts with measured area, specified coat thickness and the complete number of coats—not the number of bags a dealer has in stock.
Require the technical data sheet to state the mixing ratio, water-to-cement ratio where applicable, wet or dry film thickness, coverage per kilogram, recoat interval, curing period, permitted application temperature and protection required from rain.
Ask the dealer to show this calculation:
Net material = area in square metres × application rate per square metre × number of coats
Then add a documented allowance for surface roughness, porosity, detailing and waste, and round the result up to whole pack sizes. A stated coverage of 1.5 square metres per kilogram does not mean a 100-square-metre slab needs only 66.7 kilograms when absorption or two coats change the actual requirement.
| Scope | Quantity basis | Examples |
|---|---|---|
| Field waterproofing | Measured area, coat thickness and coat count | Slab, wall or floor coating |
| Detailing | Measured length or specified points | Coves, cracks, joints, corners and upstands |
| Accessories | Count or measured length | Pipe sleeves, drains, reinforcing mesh, primers and repair mortar |
Do not accept a quote that stops at open floor area. Parapets, upstands, corners, drains and penetrations are common water paths and must appear as measured or specified details.
Compare cost per completed square metre, including labour and accessories, rather than price per bag or drum. A thinner-applied product can cost more through extra coats, labour and premature repair.
What application and compatibility checks should the dealer support?
Ask for a written application sequence covering surface preparation, treatment and protection. The applicator must remove laitance, loose concrete, dust, oil, curing-compound residue, algae, efflorescence and weak plaster, then repair honeycombing and open voids.
| Substrate condition | Dealer must specify | Risk if ignored |
|---|---|---|
| Saturated-surface-dry, damp or fully dry | Required condition for the product | Poor adhesion or trapped moisture |
| Active cracks or leaks | Injection, plugging or separate repair | Leakage continues beneath the coating |
| Dormant cracks, moving cracks and joints | Sealant, reinforcement or joint detail | Rigid coating cracks again |
| Coves and pipe penetrations | Reinforced detailing and compatible sealant | Water bypasses the main layer |
| Positive and negative water pressure | Approved application side and system | Delamination or moisture breakthrough |
The instructions must state mixing order, pot life for two-component products, coat thickness, curing time and the period when rain, traffic, backfilling or ponding is prohibited. On roofs, balconies and terraces, inspect falls, blocked outlets and drainage before approving a coating; no layer compensates for standing water or a defective outlet.
Ask whether the finished layer needs a protective screed and suits sunlight, foot traffic, tiles, plaster or paint. For bathrooms, confirm compatibility with tile adhesive, grout, sanitary-ware sealant and movement-joint sealant. For tanks, demand potable-water-contact documentation rather than assuming a roof product is suitable.
The dealer must identify compatible primers, repair mortars, reinforcing mesh and sealants from one approved system. Mixing components from different systems can invalidate performance and warranty conditions.
How should you compare dealer support, warranty and delivery before buying?
Compare dealers on documented service, not on stock alone.
| Evidence or service | What to verify |
|---|---|
| Sealed, traceable stock | Unbroken seals, manufacturing date, batch number and invoice match |
| Storage conditions | Powders stored dry and elevated; liquids and resins kept in controlled conditions |
| Documents | Current technical data sheets and safety data sheets for the exact product |
| Site support | Application guidance, technical support, compatible primers and sealants, and other detailing materials |
| Logistics | Written delivery date and return policy |
A written manufacturer warranty must name the waterproofing system, preparation standard, coat number and thickness, curing period, applicator requirements, exclusions and remedy for failure. Treat “10-year waterproofing” as incomplete until it states whether ponding, substrate movement, cracks, poor preparation and later unapproved work are excluded.
Ask who will inspect a failure and whether the dealer can escalate it to Astral using the invoice, batch record, photographs and application log. For a Nagpur buyer, Shree Paint Studio belongs in the comparison only if it provides the same traceability, documentation and system-level technical support as competing dealers.
Give every dealer identical measured drawings, photographs and site details. Compare the written recommendation, complete quantity, compatible accessories, delivery commitment and warranty conditions line by line. The strongest dealer supplies a documented system, including compatible detailing materials, rather than containers alone.
Related products
 | Astral Waterproofing Trubuild Buildcrete is an acrylic polymer-based compound that forms a matrix when mixed with cement and exhibits excellent waterproofing properties. View product → |
 | Astral Waterproofing Trubuild BoreTite is an epoxy-based, one-pack system specially formulated to achieve leak-free bore packing. View product → |
Frequently asked questions
How can you verify that an Astral waterproofing dealer is authorised?
Use Astral’s official dealer locator or current customer-support channel. Ask Astral to confirm the seller’s authorisation for the specific waterproofing product and your region. A shop displaying Astral packs is not proof of authorisation.
Which Astral waterproofing system and product form fit your building location?
Identify the location and exposure first: roofs, bathrooms, basements, water tanks, external walls and construction joints need different systems. Ask the dealer to specify the product form, primer, reinforcement, number of coats and compatible protective finish.
What should a dealer’s technical quotation calculate?
The quotation should state the measured area, coverage rate per coat, number of coats, pack sizes, total quantity, primer and reinforcement requirements, surface preparation, labour assumptions, taxes, delivery and wastage allowance.
What application and compatibility checks should the dealer support?
Ask for substrate preparation, moisture limits, mixing ratios, recoat intervals, curing time, application tools and weather limits. Confirm compatibility with concrete, masonry, existing coatings, tiles, sealants and the planned topcoat.
How should you compare dealer support, warranty and delivery before buying?
Compare written warranty conditions, inspection and complaint procedures, technical-site support, batch and expiry details, delivery schedule, replacement policy and whether the quotation covers every component needed for the complete system.
