bonding agents for plaster and concrete
Bonding agents are crucial in ensuring the strength and durability of plaster, concrete, and gypsum applications.

Additionally, these agents act as a bridge between the substrate and the material being applied, creating a strong adhesion and preventing delamination or failure over time.

Furthermore, Sunanda Global's bonding agents can be used for interior and exterior applications. This versatility is essential for various construction projects, ranging from residential homes to commercial buildings, where different substrates and environmental conditions are encountered.

Bonding agents ensure strong adhesion and long-lasting performance in plaster, concrete, and gypsum applications.

By effectively bonding the materials to the substrate, these agents minimize the risk of failure, improve structural integrity, and contribute to the overall quality of the finished product.

Therefore, whether achieving a smooth and robust plaster finish, enhancing the bond between concrete surfaces, or optimizing gypsum-based systems, utilizing the appropriate bonding agent is essential for successful construction projects.
Bonding Agents for Plaster
For plaster applications, bonding agents are essential to improve the bond between the substrate and the plaster layer. Furthermore, they enhance the plaster's ability to adhere to surfaces, minimizing the risk of cracking or detachment. By promoting a secure bond, these agents contribute to plastered surfaces' longevity and structural integrity.
HACK AID PLAST: Bonding agent for plaster and glazed tiles
  • Roof slabs – flat or sloping, chajjas, folded plate roofs, vaulted roofs, domes, etc.
  • Flooring, external walls
  • Sunk and non-sunk portions of bathrooms, toilets, balconies, etc.
  • Overhead or underground water tanks and other large reservoirs
  • Mortars for filling joints of C.I. or any other drainage pipes
  • As a protective coating to RCC floorings, substructures against sulphate attacks
  • It can be easily mixed with cement forming an impermeable co-matrix film
  • Alkaline and compatible with concrete
  • It does not facilitate carbonation
  • It can be applied in moist and damp conditions, e.g., exteriors, and terraces in wet spells of monsoon
  • It can be applied in underground and/or overhead water tanks almost immediately after emptying
  • High flexural strength and extraordinary adhesion of the polymer
  • It can be used as a base waterproofing coat on external walls, and after curing, it can receive SUNEXT 8
  • Surface preparation of the surface to be waterproofing is very important.
  • Scrub and clean the surface
  • Remove laitance, dirt, paint, loose flakes, particles, foreign matter, etc.,
  • For cleaning, you can use a vacuum cleaner, a high-pressure water jet, wet sandblasting, or wire brushing
  • Ensure that the concrete surface possesses an open pore surface texture
  • Repair any faulty concrete in the form of cracks, honeycombing, etc.
  • Fill hairline cracks on plaster/mortar fill the same with POLYFILL AR as per specifications
  • Remove all curing compounds and sealers
  • Moisten the surface with a water jet 24 hours before applying POLYALK WP
  • Mix 1 part of POLYALK WP and 1 or 1.25 parts of fresh white or grey cement
  • Continuous hand-mixing to form a lump-free consistency may also be adequate
  • Keep the mix continuously stirred
  • Apply the slurry by brush/roller to the damp surface
  • Apply two/three more coats of similar slurry at 24 hrs intervals
  • Allow setting for 24-48 hours
  • Cure the coating for 2-3 days by sprinkling water on the vertical surface (external walls) three times a day
  • Use moist gunny bags on the horizontal surface (terraces, toilets, etc.)
  • Provide a protective screed/plaster for flat surfaces on the POLYALK WP coating
  • For external surfaces, provide a protective coating of SUNEXT 8
HACK AID PLAST SPL: Acrylic bonding agent for PCC-based plaster
  • Bond between concrete and plaster
  • Bond between concrete and ceramic/glazed tile
  • Bond between new and old concrete
  • Holds the concrete tightly due to interaction polymerization
  • The bond strength increases after curing
  • Preserve the bond between steel and concrete
  • Non-ionic; hence, no possibility of an attack on concrete by ions like chlorides, alkali sulphates, etc
  • Clean the surface with a water jet thoroughly to remove dirt, loose particles, etc
  • On the entire clean moist surface, apply a coat of HACK AID PLAST by spray
  • When the surface becomes tacky, apply a chat/dash-coat of cement mortar in 10 minutes
  • Check and ensure that the surface is tacky before application
  • Plaster the surface or place the concrete in the usual manner after setting the chat/dash coat
Bonding Agents for Concrete

In the realm of concrete, bonding agents are equally important. Specifically formulated to enhance the adhesion between new and existing concrete surfaces, these agents can bond fresh concrete to hardened concrete, ensuring a seamless transition and preventing the formation of weak points or joints. Additionally, bonding agents enhance the bond strength when applying overlays or repairs on existing concrete structures, resulting in a more robust and reliable outcome.

POLYALK EP: High-performance acrylic polymer for mortar modification
  • Repair of RCC members, water tanks, and industrial floors
  • Grouting of RCC members
  • Finish plastering for brick and blockwork
  • Heritage structures rehabilitation
  • Staircase steps retrofitting, foundation grouting
  • Pipe joints – new and repaired
  • Increases interfacial adhesion
  • Increases impermeability
  • Increases tensile and flexural strength
  • Compensates for volume changes due to shrinkage
  • Due to its simple application procedure, there is a significant reduction in labour cost and application time


  • Take 0.5 part fresh cement, 1 part POLYALK EP (by weight)
  • Mix thoroughly, preferably using a mechanical mixer
  • A slurry of a consistency easily applicable by brush is ready for use as a bonding material
  • In special cases, this composition may be modified by consulting CMCD
  • Clean the surface on which the bonding coat is to be applied
  • Clean it with a water jet approximately 24 hrs before application
  • Apply the bonding coat on the cleaned RCC surface by brush, taking care to avoid pinholes
  • Place the next screed or mortar, etc., that is to come over its wet on wet application


  • Take 1 kg POLYALK EP, 5 kg fresh Cement, and 15 kg Quartz sand (graded)
  • (Polymer: Cement: Quartz Sand) Ratio is 1:5:15
  • This is a globally recommended composition
  • However, the proportion can be modified based on the consultant’s recommendations
  • First, dry mix the cement and graded sand in a mixer
  • Mix POLYALK EP with the premixed cement sand in the mixer
  • Mix for at least 3 minutes
  • A mechanical mixer with a specially designed stirrer may be conveniently used
  • Add a requisite quantity of water to attain dough-like consistency so that it can be hand-packed
  • The mortar is now ready for use


  • Take 2 kg POLYALK EP, 5 kg fresh cement, and 15 kg graded quartz sand. (i.e., in the ratio of 2:5:15)
  • Mix the three ingredients (without water), preferably in a mechanical mixer
  • Mix it till a soft mix of uniform consistency is formed
  • A blend with this proportion has the required strength and flexibility suitable for filling cracks effectively


  • Take 1 kg POLYALK EP, 3 kg fresh cement, and 2 kg water (i.e., in the ratio of 1:3:2)
  • First, mix POLYALK EP and water
  • Add this to the cement using a mechanical mixer till a slurry of uniform consistency is formed
  • The above proportion of POLYALK EP may be modified by consulting CMCD
  • The modification depends upon the various needs of the grout application
Bonding Agents for Gypsum

Moreover, gypsum-based applications, such as gypsum plasters or gypsum boards, also benefit from bonding agents. These agents provide an effective means of promoting adhesion between the gypsum material and diverse substrates. Furthermore, these bonding agents enhance the bond strength, reduce the likelihood of cracks, and improve the overall performance of gypsum-based systems. Whether it's plastering walls, constructing drywall partitions, or creating decorative gypsum finishes, bonding agents contribute to the integrity and longevity of the application.

HACK AID PLAST G: Bonding agent for gypsum plaster
  • Bond between concrete and plaster
  • Bond between concrete and ceramic/glazed tile
  • Bond between new and old concrete
  • User-friendly, applied as single coat paint application
  • Green in colour, easy to identify on the applied surfaces
  • Strong chemical and mechanical bond
  • Easy to apply, can be applied by brush
  • Dries within 24 hours and allows
  • Clean the surface thoroughly to make it free from loose particles, dirt, dust, oils, paint, etc.
  • Apply the content on the application surface with a good-quality paintbrush
  • Allow it to dry for 24 hours
  • Application of the gypsum on the applied area should be carried out within the next 10 days
  • Do not disturb the HACK AID PLAST G film. Place another substrate in the usual manner.
  • Do not apply on wet surfaces
SUNEPOXY ADH: Epoxy adhesive for structural applications
  • Bonding precast concrete deck panels and steel plates to concrete
  • Gap filling
  • Excellent adhesion to concrete and steel
  • Easy manual mixing and trowel application
  • Excellent abrasion and impact resistance
  • High strength and high modulus of elasticity
  • High initial and ultimate strengths
  • Impermeable to liquids and water vapor
  • Minimal water absorption
  • Suitable for dry and slightly damp concrete surfaces
  • Hardening is not affected by humidity
  • Thixotropic: non-sag in vertical and overhead applications
  • Hardens without shrinkage
  • Different colored components (for mixing control)
  • No primer needed
  • Good chemical resistance
  • VOC-compliant, 100% solids
  • Use SUNEPOXY ADH mixed adhesive.
  • Apply it to the prepared surface.
  • Apply with a spatula, trowel, notched trowel, or gloves.