Infrastructure Waterproofing: Bridge Decks, Tunnels, Podiums, Dams and Treatment Plants
Infrastructure waterproofing starts with sound concrete and ends with the membrane. On bridge decks, podiums and parking decks, Armstrong RAINPROOF PWR 690, PHB 660 and PHW 600 polyurea form a thick, seamless membrane over a primed deck. In tunnels, dams, canals and STP or ETP tanks, ROOFCOAT FLEXI 100, ROOFBOND RFX PLUS 210, ROOFCOAT PU 2K and the ROOFEX crystalline range line the face the water touches. Cracks are injected and joints sealed with ROOFEX-SEAL PS first.
By Armstrong Chemicals Pvt. Ltd. · ISO 9001:2015 certified · Protecting buildings, roofs and structures since 1982
Infrastructure waterproofing: survey the structure before specifying
Infrastructure waterproofing covers bridge deck waterproofing, tunnel waterproofing, podium and parking deck waterproofing, dams and canals, and STP and ETP tanks. The structures differ, but the questions an engineer asks are the same: which face the water touches, what traffic or cover goes over the membrane, how long the structure can be closed, and what state the concrete is in. Armstrong manufactures polyurea coating, polyurethane, cementitious and crystalline systems, injection grouts and joint sealants for this work. Six checks decide the specification.
Which face does the water touch?
That is the positive side, and it is waterproofed first. Where it cannot be reached, as in a tunnel in service, the inside face is treated instead.
What goes over the membrane?
A wearing course, a screed, ballast, soil or nothing. That decides the thickness and toughness needed.
How long can it be closed?
A deck with a traffic block of a few hours needs a spray polyurea that gels in seconds. New construction can take a slower system.
What state is the concrete in?
Cracks, spalls, exposed steel, honeycombs and running leaks are all repaired before any primer goes on.
What is in the water?
Sewage, effluent, sea water and sulphates need a lining that is listed for them.
Where are the joints, and how much do they move?
Expansion joints get a sealant sized for the movement. A membrane is not carried rigidly across a moving joint.
Find the Armstrong waterproofing system for your structure
Match the structure to one route. Each route takes you to its section.
Bridge deck, flyover, metro or rail deck
Podium, parking deck, walkway or stadium
Tunnel, underpass, culvert or underground station
Dam, canal, reservoir or power project
STP, ETP or sewage structure
Leaking cracks, failed joints or damaged concrete
Let the finder suggest a system
The membrane is the last step, not the first. Sound concrete, sealed joints and a primed surface come before it, and the structure is repaired wherever a repair will hold.
Infrastructure waterproofing system finder
Armstrong makes polyurea, polyurethane, cementitious and crystalline systems, and each is right for a different structure and condition. Answer three questions for a starting point. The project engineer and an Armstrong expert confirm the specification.
Which structure is it?
What can be reached, and in what state?
How long can the area be closed?
Bridge deck waterproofing with polyurea: RAINPROOF PWR 690, PHB 660 and PHW 600
A deck membrane has to stop water and chlorides reaching the steel in the slab, stay bonded under traffic, and be laid in a short closure. Polyurea suits this because it is 100% solids, so the thickness applied is the thickness that stays, and it cures fast into a thick, seamless, elastic film. Armstrong makes three hybrid polyurea coatings. All three are listed for bridge decks. They differ in how they are applied and how fast they cure.
- 1Clean the deckClean the concrete by grinding, wire brushing or high-pressure water jetting until it is free of dust, oil, grease, laitance and loose particles. Smooth, dense concrete is ground, sand blasted or shot blasted, then vacuumed.Why: The membrane bonds only to clean, sound concrete. Dust, oil and laitance leave a weak layer that peels.
- 2Repair the slabCheck the deck for soundness. Hollow and damaged areas are rebuilt with epoxy mortar. Small cracks are opened, cleaned and filled with ROOFCRETE EP. Cracks that move are sealed with ROOFEXSEAL PU 212.Why: A membrane cannot bridge a hollow or broken deck. Rebuilding it first gives the membrane a sound base.
- 3Detail the joints, kerbs and spoutsExpansion joints are sealed, not coated over. Seal around every drainage spout and fixing. The membrane is turned up the kerbs and crash barriers.Why: Joints move, so they are sealed to move, not coated over. Spouts and fixings are leak points that need their own seal.
- 4Let new concrete ageNew concrete needs a minimum of 28 days before SHINESHIELD WP 305 is applied.Why: New concrete is still releasing moisture and alkalinity, which blow blisters in a membrane applied too soon.
- 5PrimeFor RAINPROOF PWR 690, apply SHINESHIELD WP 305 as the primer, one coat at a minimum of 0.15 mm, and wait 2 to 3 hours at 30°C before the membrane. The spray polyureas are also applied over a primer on every job.Why: The primer seals the pores of the concrete and gives the polyurea a bond. Waiting the stated time stops it trapping solvent.
- 6Apply the membraneMix RAINPROOF PWR 690 for 2 to 3 minutes with a low-speed mixer and apply it over the dry primer at about 1.2 kg per sq.m. The spray polyureas are applied by trained applicators with heated plural-component equipment. Do not apply in direct sun, in rising temperatures or just before rain.Why: The membrane is the waterproof layer. Mixing and applying it as stated gives the stated thickness and cure.
- 7Cover itThe membrane can be overcoated with a wear coat or a cement screed.Why: A wear coat or screed protects the membrane from traffic and the sun.
Podium and parking deck waterproofing
A podium carries paving, planters and fire tenders over occupied space. A parking deck takes tyres, oil and turning loads. Several Armstrong systems are listed for them, and each suits the job. Pick by what goes on top and how the deck is used, and an Armstrong expert helps you choose. The balcony and podium waterproofing page covers residential podiums in detail.
On exposed roofs and podiums, SUMMERSHIELD COOL 666 is recommended as a heat reflective top coat over RAINPROOF PWR 690.
Tunnel waterproofing and underground structures: membranes, crystalline coatings and shotcrete
Below ground the water comes from outside and pushes in. The best place for the waterproofing is the outside face, the positive side, and that is only open during construction. In a tunnel, underpass or station box already in service, the inside face is the only one that can be reached, so the treatment has to hold against water pressure from behind. Building basements are covered on the basement waterproofing page and earth-retaining walls on the retaining wall waterproofing page.
On an earth-facing RCC wall with the outside open, the Armstrong procedure is: clean the face mechanically, pack honeycombs and voids, and seal tie-rod holes, shutter joints and pipe entries flush with a putty of ROOFBOND SBR 401, cement and graded sand at 1:1:1. Then apply the membrane, such as ROOFCOAT FLEXI 100 or ROOFBOND RFX PLUS 210, and protect the work with a mortar screed or protection board before backfilling.
Applying a crystalline coating on the inside face
- 1Remove everything looseTake off loose plaster, old coatings, laitance and salts down to sound concrete. Open up honeycombs and dry-pack them.Why: A crystalline coating works in sound concrete. Loose plaster and laitance block it from the concrete.
- 2Stop running waterPlug point leaks with RAPIDSTRONG PLUG 31 or WONDERSEAL PLUG XL and inject leaking cracks and joints before coating.Why: Running water washes the slurry away before it can form crystals, so leaks are stopped first.
- 3Dampen the surfaceCrystalline coatings are applied on dampened concrete, never on a dry or dusty face.Why: The crystals form in water. A dry face pulls the water out of the slurry and starves the reaction.
- 4Apply two coatsBrush or spray the slurry in two coats. For ROOFEX COP, the second coat goes on within 48 hours while the first is still green.Why: Two coats deliver the full amount of active material, and the second goes on while the first is still green so they bond.
- 5Moisture cureFog or mist spray 3 to 4 times a day for 2 to 3 days. Do not use a membrane curing compound on a crystalline coating.Why: The crystals need moisture for days to grow. A membrane curing compound would block the surface the crystals form through.
- 6Allow timeAllow 48 hours before foot traffic and 2 to 4 weeks for full activation. Water-retaining structures wait a minimum of 15 days before filling.Why: The crystals take weeks to fully form, and a water-retaining structure is not filled until they have.
Shotcrete and sprayed concrete accelerators
Rock bolts and anchors are covered on the grouting and anchoring page.
Dam, canal, reservoir and STP waterproofing: water-retaining and treatment structures
A water-retaining structure is made watertight in three layers of defence: dense concrete, treated joints, and a lining on the face the water touches. The lining is positive-side waterproofing, and it comes first. A coating on the dry face is a second barrier and does not replace it.
- 1Make the concrete denseLow water-cement ratio, an integral compound, full compaction and curing. ROOFEXCURE WB is sprayed at 4 to 6 sq.m per kg where water curing is not practical, 1 to 2 hours after the concrete is placed or straight after the formwork is struck.Why: A dense concrete is the first line of defence, and every liner and coating above it depends on it.
- 2Treat joints, sleeves and tie-rod holesConstruction joints can take ROOFEX as a slurry or dry powder, or ROOFEX COP as a dry pack, at 1.5 kg per sq.m before the next pour. Expansion joints are primed with ROOFEXSEAL PRIMER PS / NPS and sealed with ROOFEX-SEAL PS.Why: Joints, sleeves and tie-rod holes are where water gets into water-retaining structures, so they get their own detail.
- 3Repair before liningHoneycombs are opened and packed. Leaking cracks are injected. All loose material comes off.Why: A lining laid over honeycombs and leaking cracks fails where the water pushes it.
- 4Line the wet faceApply the lining chosen for the liquid and the pressure, in the coats and thickness stated for it. ROOFCOAT PU 2K covers 6 to 8 sq.ft per kg in two coats, applied crosswise on a pre-wetted surface. ROOFCOAT FLEXI 100 covers 20 to 30 sq.ft per litre for two coats, mixed 1 litre with 2 kg of cement and 200 ml of water. ROOFBOND RFX PLUS 210 covers 13 to 14 sq.m per 20.1 kg unit.Why: The lining goes on the face the water touches, in the stated coats and thickness, so it holds the pressure.
- 5Cure for the stated timeROOFBOND RFX PLUS 210 is water cured for 7 days before flood testing. ROOFCOAT PU 2K needs 3 to 5 days of air cure before water contact. The crystalline coatings wait a minimum of 15 days before filling.Why: An uncured lining can be damaged or washed out when it first meets water.
- 6Fill and testFill in stages and record the level. Small tanks and sumps are covered on the water tank waterproofing page.Why: Filling in stages and recording the level shows any leak while it is small.
Seeping concrete: grout through drilled holes before any lining goes on
When water leaks, seeps or sweats through porous, honeycombed or cracked concrete, it has to be stopped inside the concrete first. This is the standard negative-side method for tanks, pools, basements, lift pits and retaining walls. A lining laid over concrete that is still seeping is pushed off by the water behind it: it blisters, lifts and fails. Grouting through drilled holes fills the internal voids and capillaries along the path of the water, so the surface is dry and sound before the coating or membrane goes on. Doses, thicknesses and coats are the standard figures; the site and the exposure decide where they move.
- 1Drill the injection pointsDrill 12 to 14 mm holes with an electric drill into the leaking or honeycombed zone, to the depth the member needs (14 to 16 mm on thick retaining walls).Why: The holes intercept the pathways the water is travelling along, so the grout reaches the voids instead of just sitting on the surface.
- 2Fix the nozzlesFix a rubber injection nozzle in each hole with a quick-setting putty of cement mixed with the set accelerator RAPIDSTRONG QS 113. For active flow, the single-component plugging compound RAPIDSTRONG PLUG can be used to fix the nozzle instead.Why: The nozzle must be locked into the hole before pumping starts. If it is not, the pressure blows it out and the grout runs back out of the hole.On site: The datasheet gives RAPIDSTRONG QS 113 at 500 ml to 2 L per 50 kg of cement and asks for a site trial, so trial the dose on the job before fixing every nozzle.
- 3Seeping or sweating concrete: cement slurryMix a cement slurry with a non-shrink grout additive and pump it into each nozzle with a grout pump at about 140 psi, until that point refuses to take any more. Any of three additives can be used: RAPIDSTRONG GROUT ADMIX at 250 g per 50 kg of cement, RAPIDSTRONG GROUT PB 66 (a polymer grout additive, dosed as on its datasheet) or ROOFEX GP (a crystalline grout compound, dosed at 250 g per 50 kg of cement).Why: The slurry fills the internal voids and capillaries. The additive keeps it from shrinking away from the concrete as it sets, which an ordinary cement slurry does, and the crystalline option also seals the capillaries.On site: Work from the lowest nozzle upward on a wall, so the slurry pushes the water and air out ahead of it.
- 4Running or gushing water: polyurethane resinWhere water is flowing or gushing, cement slurry would simply wash away before it sets. First stop the surface flow with RAPIDSTRONG PLUG in a V-groove, then inject RAPIDSTRONG GROUT PU, the single-component polyurethane grout, with air-compressed injection equipment at about 500 g per grout point.Why: The polyurethane reacts with the water itself, expanding and stiffening to block the flow, so it works where cement cannot.On site: A hard-working point can take 0.3 to 0.75 kg. Polyurethane grouting alone only stops the flow; it is not a guaranteed waterproofing system, so follow it with the lining or coating the structure needs.
- 5Remove the nozzles and sealOnce grouting is complete, remove the nozzles and patch every hole flush with a putty of ROOFCRETE AR and cement.Why: This leaves a smooth, sound, watertight surface ready for the final lining.
- 6Check before liningLook at the face again after the grout has set. Any point still wet gets another nozzle beside it before the coating, membrane or plaster goes on.Why: A single wet patch left behind becomes the first blister under the new lining.
Dam leakage grouting, crack injection and concrete repair: fix the structure before the membrane
Most structures that need waterproofing also need repair. The order is fixed: stop running water, inject the cracks, remove all loose and damaged concrete, treat the steel, rebuild, reseal the joints, and only then apply a membrane. Repair is always tried first. Re-decking a bridge or relining a whole structure is the extreme case, taken only when a structural engineer finds the concrete beyond repair.
Bridge piers and large concrete faces: three coats of RAINSEAL RWC 902
Doses, thicknesses and the number of coats change with the surface, the exposure and the site. Use this as the standard sequence and adjust it to the job. This is how large concrete faces on a bridge project were coated with a grey rubberised membrane.
- 1Clean the faceClean the surface of dirt, dust, oil, grease and other contamination, using mechanised buffing tools.
- 2First layerApply one coat of RAINSEAL RWC 902, the grey rubberised elastomeric flexible coating, diluted with 20% water.
- 3Second layerWhen the first layer has dried, apply the second coat of RAINSEAL RWC 902 diluted with 20% water.
- 4Third layerWhen the second layer has dried, apply the third coat, again diluted with 20% water.
- 5Hand over the face in the right stateThe face must be handed over for coating without honeycombs, holes or undulations, and fully cured. Repair any of these first. See the repair section above.
Weir and baffle block repair: consolidation grouting and anchored repair
Doses, thicknesses and the number of coats change with the surface, the exposure and the site. Use this as the standard sequence and adjust it to the job. This is the sequence used on distressed baffle blocks of a weir.
- 1Open and cleanCut a V-groove around each block and clean it with an air and water jet. Remove loose concrete gently, down to sound concrete.
- 2Drill and fix nozzlesDrill 10 mm holes at about 300 mm centres to a depth of 150 mm and fix 8 mm PVC nozzles for grouting.
- 3Consolidation groutingGrout through the nozzles with a cement slurry mixed with a chemical grout additive, or with neat cement slurry mixed with an expansive agent, under pressure, until the voids are filled.
- 4Seal the nozzlesCut the nozzles off flush after grouting and seal them with epoxy putty.
- 5Treat the steelClean exposed reinforcement with a wire brush or emery cloth and give it two coats of an anticorrosive coating, such as ALSTRONG ZP 777.
- 6Rebuild honeycombsFill honeycombs and damaged surfaces with a polymer-modified repair mortar about 30 mm thick, over a bond coat. ROOFCRETE AR over ROOFBOND SBR 401 is the Armstrong system.
- 7Tie the repair with dowelsOn the block faces, drill 20 mm holes in a staggered pattern at 150 mm centres, slanting and about 600 mm deep, and fix 16 mm bars in them with an anchor grout. See the grouting and anchoring page.
Expansion joint sealing on decks, tanks and pavements
Joint design is covered on the expansion joint sealing page, resin choice on injection grouting, spalled concrete on structural concrete repair, and exposed structural steel on steel rust protection. Large-movement bridge deck expansion joints use purpose-made mechanical joint systems. The sealants above are for pavement, kerb, tank and other small-movement joints. A structural engineer confirms any load-bearing repair before it is specified.
Polyurea vs PU vs crystalline waterproofing: compare the Armstrong systems
Every system below is used on infrastructure. They are different chemistries for different conditions, and none is a lesser product. Polyurea and polyurethane are the premium options.
Approvals and project sectors
Armstrong's product portfolio lists RAINPROOF PWR 690 as CPWD and Central Infrastructure approved. Armstrong's brochure records appreciation from hydel and thermal power projects and from MES and Panchayat Raj and R&B works, and Armstrong serves as technical training faculty for BIS, ESCI, NAC and MES. The brochure also lists metro rail, hydel and thermal power, and MES works among its projects. Ask Armstrong for the test reports and approval letters your project needs.
Infrastructure waterproofing chemicals and products by stage of work
How much waterproofing material for 1,000 sq.m: bridge deck polyurea and linings
Approximate quantities for 1,000 sq.m (10,764 sq.ft) of deck, wall or tank surface, worked out from each product's stated consumption on a smooth, prepared surface. Upturns, rough concrete and spray loss add to this. An Armstrong expert confirms the final quantity after seeing the site.
The three polyureas are the deck membranes. The cementitious and crystalline coatings are for tunnels, tanks and other linings. Where a membrane or crystalline coating will follow, the curing compound film is removed by grinding or blasting during surface preparation.
Standards and stated test figures for infrastructure waterproofing
- RAINPROOF PWR 690 and RAINPROOF PHB 660 are stated to comply with ASTM C-1250, D-2196, D-1475 and D-570. These are test methods for solids content, viscosity, density and water absorption.
- RAINPROOF PWR 690: tensile strength above 30 MPa (ASTM D 412), adhesion to concrete above 380 psi (ASTM D 4541), water absorption below 1.5% (ASTM D 570), elongation 700%+, 100% solids.
- RAINPROOF PHW 600: elongation at break above 510% (ASTM D 412), abrasion resistance to ASTM D 4060, UV stability to ASTM G 154.
- ROOFCOAT FLEXI 100: elongation 120%+, tensile strength above 1.5 N/mm², adhesion to concrete above 1.0 MPa (ASTM D 412, C 836, D 4541). ROOFBOND RFX PLUS 210: elongation 120%+, nil water penetration at a 50 m water column, bond strength 2.0 N/mm² (ASTM C 836, D 4541, EN 1062-7).
- ROOFCOAT PU 2K: EN 1062-3 and EN 1504-2, nil chloride permeability to ASTM C 1202.
- ROOFEX 2K 711: 10 to 12 bar hydrostatic resistance (ASTM D 5385), adhesion 1.65 MPa (ASTM D 4541).
- ROOFEX-SEAL PS: ASTM C-920-87, DIN 18549, TT-S-00227E and BS 4254-83. ROOFEXSEAL PU 212: IS 11433:1985, ASTM C 920-87, BS 5212 and AS 4020:2018.
- ROOFPLAST SA 80, RAPIDSTRONG SG 88 and ALSTRONG FS 334 comply with IS 9103. RAPIDSTRONG QS 113 complies with IS 2645. ROOFEXCURE WB and ROOFEXCURE WX comply with ASTM C-309.
- Figures are from Armstrong laboratory tests under controlled conditions. Site performance varies with the substrate, the weather and the workmanship.
Infrastructure waterproofing material calculator
Enter the area to be coated and, if you wish, the length of cracks to be sealed. Quantities only.
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Which membrane or coating?
Is this new concrete that needs curing?
Seven mistakes that make infrastructure waterproofing fail
- Coating over damaged concrete. A membrane bonds to whatever is on top, so loose and spalled concrete is removed and rebuilt first.
- Skipping the primer. Polyurea is applied over a primer on every job.
- Spraying on damp concrete or before rain. Moisture under a fast-curing membrane shows up as blisters.
- Carrying a membrane rigidly across a moving joint. Joints are sealed with a sealant sized for the movement.
- Treating the dry face when the wet face can be reached. Positive-side waterproofing comes first.
- Coating over a running leak. The water is stopped by plugging and injection before any coating.
- Filling or opening to traffic early. Each system has a stated cure time before water or wheels.
Infrastructure waterproofing questions and answers
Which chemical is used for bridge deck waterproofing?
A polyurea membrane on the repaired and primed deck. Armstrong makes RAINPROOF PWR 690, applied by brush, roller or airless spray at 1.2 to 2.0 mm, and two spray polyureas, RAINPROOF PHB 660 and RAINPROOF PHW 600. Cracks are filled with ROOFCRETE EP or sealed with ROOFEXSEAL PU 212 before priming.
Why is polyurea used on a bridge deck?
It is 100% solids, so the thickness applied stays in the cured film. It cures fast into a thick, seamless, elastic membrane that bonds strongly to concrete and resists abrasion, so the closure can be kept short.
How fast can traffic return after polyurea waterproofing?
RAINPROOF PHB 660 gels in 5 to 10 seconds and is walkable in 2 minutes, with full mechanical strength in 24 to 48 hours. RAINPROOF PHW 600 is walkable in 10 minutes. RAINPROOF PWR 690 is walkable in 1 to 3 hours. The wearing course and the opening to vehicles follow the project specification.
What is the difference between polyurea and polyurethane waterproofing?
Both are elastic, seamless membranes. Polyurea reacts much faster, is usually sprayed with heated two-component equipment and builds thickness in one pass. Polyurethane cures more slowly and is applied by roller or brush in layers. Armstrong's RAINPROOF polyureas are hybrids of the two.
How is a tunnel waterproofed from inside?
When the outside face cannot be reached, running leaks are injected with a PU grout, then a crystalline coating such as ROOFEX or ROOFEX 2K 711 is applied in two coats on the dampened inside face. ROOFEX 2K 711 resists 10 to 12 bar and is listed for tunnels and canals.
What stops a leaking dam gallery or wall?
Water-reactive PU injection. RAPIDSTRONG GROUT PU or RAPIDSTRONG GROUT PFC 79 is pumped through packers into the leaking crack or joint, reacts with the water and expands to seal it. Where the crack also needs strength, RAPIDSTRONG GROUT VM 99 or RAPIDSTRONG GROUT PCR 89 is used.
Which waterproofing is used for an STP or ETP?
A lining on the face the liquid touches. ROOFCOAT PU 2K is listed for STPs and sewage structures, and ROOFEX, ROOFEX XL, ROOFEX 2K 711 and ROOFEX COP are crystalline coatings listed for sewage and effluent treatment plants. The choice depends on the liquid, so ask an Armstrong expert.
What is positive-side and negative-side waterproofing?
Positive side is the face the water touches: the top of a deck, the outside of a basement, the inside of a tank. Negative side is the opposite, dry face. Positive-side waterproofing comes first. Negative-side treatment is used where the wet face cannot be reached.
Which sealant is used in bridge and pavement expansion joints?
ROOFEX-SEAL PS, a two-part polysulphide, takes joints of 6 to 25 mm in one application and resists petrol, diesel and jet fuel. RAINSEAL BS is an elastomeric bitumen sealant for road, runway and bridge deck joints, and ROOFEXSEAL PU 212 takes ±25% movement. Large-movement bridge deck expansion joints use mechanical joint systems, not a poured or gunned sealant.
How thick should a polyurea deck membrane be?
RAINPROOF PWR 690 is applied at 1.2 to 2.0 mm, and RAINPROOF PHW 600 at 1.5 mm in a single pass. The project specification sets the final figure.
Does polyurea need a primer?
Yes. SHINESHIELD WP 305 is the primer recommended under RAINPROOF PWR 690, one coat at a minimum of 0.15 mm. New concrete is left for at least 28 days before priming.
Can concrete be repaired under water?
Yes. ROOFCRETE EUW is a structural epoxy mortar mixed on the surface, placed by hand or trowel under water and compacted against the substrate. It cures under water in 48 to 72 hours.
Which accelerator is used for tunnel shotcrete?
ROOFPLAST SA 80 is an alkali-free liquid accelerator dosed at the nozzle at 1 to 3 kg per 50 kg bag of cement. RAPIDSTRONG SG 88 gives a non-sagging mix for overhead work, and ALSTRONG FS 334 suits wet ground.
Which approvals does Armstrong hold?
Armstrong is ISO 9001:2015 certified. Its portfolio lists RAINPROOF PWR 690 as CPWD and Central Infrastructure approved, and its brochure lists metro rail, hydel and thermal power, and MES works. Approvals are specific to a product, a department and a date, so ask Armstrong for the current approval letters and test reports for your project.
Get the right waterproofing system for your project
Send us the structure, the drawings or photographs, the exposure and the shutdown available. An Armstrong expert will recommend a system with its data sheets and test reports. Toll free 1800 103 2034. Armstrong manufactures infrastructure waterproofing chemicals and polyurea coatings in Bengaluru and supplies them all across India, with South India as its major hub.
Written by the technical team at Armstrong Chemicals Pvt. Ltd., an ISO 9001:2015 certified manufacturer of construction and waterproofing chemicals in Bengaluru, with more than 200 products. Armstrong has been protecting buildings, roofs and structures since 1982 and supplies all across India, with South India as its major hub.
The methods on this page are Armstrong's standard procedures. Doses, thicknesses and the number of coats are adjusted to the conditions on each site. Load-bearing repairs and strengthening are designed by a structural engineer.
Last updated · Questions on this method: toll free 1800 103 2034