TRENDER MATRIX is a universal plastering adhesive that can be mixed with any type of sand including m-sand or p-sand. TRENDER MATRIX is an engineered mix of cement, high-purity hydrated lime, fibers and additives designed for all regular interior and exterior applications.

Available in 2 variants:

1. Self - curing

2. Regular


Self-curing Regular
Form of material Powder Powder
Bulk Density Kg/Cu.mtr ~1200 ~1200
Comp.strength @ 7 days in N/mm2 ~2.6 ~3.4
Comp.strength @ 28 days in N/mm2 ~4.9 ~5.5
Flexural strength@ 28 days in N/mm2 ~1.48 ~1.52
Bond Strength @ 28 days in N/mm2 ~0.56 ~0.73

Advantages of Trender Matrix:

  • No curing (for self-curing variant)
  • Increased productivity by 50-200%
  • Superior product
  • Crack resistant
  • Economical
  • Easy maintenance
  • Better coverage
  • Better workability
  • No special skills required for application
  • Environment friendlier

While the regular variant requires the mandatory minimum period of curing, the self-curing variant of Trender matrix requires no curing thus saving gallons of water and the labor for curing.

Self-curing variant Regular variant
Curing No-curing Minimum curing 7-days
Substrates All substrates All substrates
Exposure Interior, Exterior Interior, Exterior
Coverage for 20mm thickness Approx. 16 Sq.ft for a mix of 6-Kg Trender Mix and 45-Kg Trender Sand
Recommended Mix Proportions

Interior Areas:

1 bag(6kg) Trender Matrix +1 bag(45kg) Trender Sand or 1 cft of river sand/m-sand

Exterior Areas:

1.25 bags(7.5 kgs) Trender Matrix +1 bag(45kg) Trender Sand or 1 cft of river sand/m-sand

Concrete Substrates:

2 bags(12kg) Trender Matrix-Self curing or Trender Matrix-Regular +1 bag(45kg) Trender Sand

Application
  • Wet the substrate to ensure the surface is saturated.
  • Allow the substrate to surface-dry
  • Prime the surface with Spatter dash mix* of Trender Matrix and sand onto the substrate followed immediately by application of plaster.
    • • Suggested priming mix proportion: 1 part Trender Matrix to 3 parts of Sand. For non-porous substrates such as concrete use a richer mix of 1 part Trender Matrix to 2 parts of Sand
  • The recommended mix for Trender plaster
    • 1 bag of Trender Matrix (6 Kgs) with 1 cft of sand or 1 bag (45 kgs) of Trender Sand The recommended mix€ for concrete ceiling is 2 bags of Trender Matrix (2 x6 kgs) with 1 cft of sand or 1 bag(45 kgs) of Trender Sand
  • For corners and edges, use a richer mix of 2 bags of Trender Matrix with 1 cft of sand or 1 bag of 45 kg Trender Sand
  • The application methods generally adopted by applicators can be adapted for Trender Plaster. However increased productivity( 200-300 sq.ft per day) can be achieved if the following procedure is followed:
    • • Apply the plaster all over the surface of the intended area
    • • Level the surface using wooden or metal floats
    • • Allow the plaster to surface dry
      • For regular variant, 30 minutes- 45 minutes depending on atmospheric conditions
      • For Self-Curing variant, 90 minutes- 120 minutes depending on atmospheric conditions
    • • Once the surface is dry enough for running the finishing tool, then the plaster can be quickly finished
  • Best results can be achieved if the plaster surface is left rough and not fine-finished.
  • No curing@ is required for SELF-CURING TRENDER MATRIX
    • *A better alternative to site-made spatter dash is usage of Trender Plaster Key, a ready mixed thin bed spatter dash, at least 7 days before Trender plaster is applied. This is to ensure better bonding between the non-porous substrate and the plaster.
    • It is advised that the plaster mix for concrete surface is arrived after proper site trials.
    • @For Regular variant, curing should begin in 4-8 hours from the time plaster is finished and should be done for a period of 7 days at an interval of 3-6 hours in high humid and high temperature areas and 6-10 hours in medium humid and medium temperature areas.
 
Q&A
  • Why are M-sand and P-sand, the current alternatives contributing to increase in plastering cracks?
    Physically, though M-sand and P-sand are similar to river sand, a few subtle differences affects it application and crack resistance properties in plastering. The surface of these material unlike river sand is rough, undulated and unsaturated and therefore has a tendency to draw more water for the requisite workability. The applicator therefore has the tendency to increase the water in the conventional Cement: M-sand mix, which gets released to the surface in an uncontrollable manner affecting the durability and aesthetics of the wall. The extra water drawn by the mix when excreted along with high heat of hydration of cement are the main causes for ugly shrinkage and crazing cracks.
  • How is it then that Trender Matrix plaster that uses M-sand/P-sand performs superior to both type of Conventional plasters that use cement with river sand or M-sand/P-sand?
    TRENDER MATRIX plaster mix consumes lesser water as the product is manufactured using workability enhancers and water retainers. This optimal water is released slowly over a period of time helping in gradual and proper hydration of the mix. TRENDER MATRIX also uses lesser quantity of cement helping it to reduce the total heat of hydration which otherwise is one major cause for conventional plasters to develop cracks. TRENDER MATRIX also uses fibers and hydrated lime in its mix to further fortify the matrix of the plaster to improve its crack resistance and improve durability. The design of TRENDER MATRIX is engineered to obviate the evils of ugly cracks on the surface as well as the substrate.
  • Is it correct that higher the strength, better the plaster?
    It’s absolutely wrong to say that quality of plaster improves with higher strength. On the contrary plasters with lower strengths like the lime plasters of yesteryears have performed far superior with better crack resistance and more durability than the conventional plasters with high strengths. As a rule, strength of plaster should be less than the substrate strength. The analogy of a man wearing a normal cotton shirt to a man wearing a high strength steel vest will best explain why higher strength of plaster affects the substrate. The man with the steel vest cannot continuously wear it for longer periods as its strength/weight will adversely affect the person’s bone and muscles and wilt. On the other hand, the man wearing a lighter cotton shirt can wear it for ages without affecting his muscle and bone structure. It is always advisable to engineer the plaster for reduced plaster strength. One of the draw backs of reducing cement in conventional plaster to reduce the strength is that it can affect the adhesion and bonding with substrate. Ideally the plaster strength for normal substrates such as clay bricks/blocks, hollow blocks, solid blocks, concrete surfaces should be between 3 to 7 mpa depending on substrate strength. The problem with conventional plaster is that with the mix proportion that is generally used, the strength of the plaster ranges from 12 mpa upwards which contributes to plaster cracks and lower durability.
  • Many say that if plaster can withstand hammering of a nail, then the plaster is very good. Is this right?

  • Completely wrong. If plaster has to withstand the hammering with nail, then it has to be stiff and strong to withstand the action. It goes against the principle and rule of plastering. Strong plasters are less flexible and stiffer and therefore is generally made with high cement content. Such plasters are liable to crack and have lower life. A good plaster is one which is flexible and softer and not stiff, one which has optimal strength(less than substrate) and not high strength, one which uses lesser cement to reduce high heat of hydration and one which can be more durable. If a nail goes into plaster smoothly without the plaster de-bonding from the substrate, then you can rest assured that your plaster is good.
  • Some people say that soft plasters are not good.
    The lime plasters of yester years which stood for centuries is a testimony that softer the plaster, lesser the cracks and better its life. If plaster is to have long life and crack resistant properties, then it should not be stiff and strong; on the other hand it should be softer and flexible.
  • If the plaster powders on hammering does it mean it’s a bad plaster?
    It’s a wrong notion that if plaster powders on high pressure impact, the plaster is bad. If that’s so then lime plasters of yesteryears that powders easily on high pressure impact would not have lasted for centuries. Such plasters are soft and can resist cracks.
Dos and don’ts of plastering
  • If strength of plaster exceeds the substrate strength, it is likely to crack the substrate. The increased instances of plaster cracks are due to the use of high strength cement in the plaster mix.
  • Thickness of plastering coat should not exceed 20 mm. If the thickness exceeds 20 mm, then it should be done in multiple coats instead of 1 coat and the first coat thickness should not exceed 10-12mm. For best results the second coat should be applied only after the first coat attains enough strength to bear the second coat’s strength.
  • Plain cement grout or rich cement mix should be avoided as final smooth finish coat on plaster. This will lead to development of crazing cracks on the plaster.
  • Smooth finishing of plaster should be avoided. Smoothing of plaster brings out the cement fines to settle on the surface. The fine particles closes the surface pores of the plaster thereby affecting the breathability of the plaster. The extra cement particles that are drawn out to the surface releases additional heat which quickly consumes the water in the plaster surface and causes hairline cracks.
  • Concrete surfaces should be prepared well before plaster application. Concrete is relatively non porous and hence the bonding with plaster may be weaker compared to porous substrates. The practice of hacking concrete surfaces should be avoided as they can cause micro cracks within the concrete especially when the concrete is young. It is better to apply a plaster key on smooth non porous surfaces instead of hacking the concrete substrate.
  • Improper curing of finished plaster leads to cracks, hence it is imperative to cure the plaster every 6 hours( 3 hours during summer) to resist cracking. It would be ideal to use a self-curing plaster as no post-plastering care is required.
  • Quality of plaster is not determined by the strength or stiffness of plaster, on the contrary the plaster is considered good if it is softer and of strength lesser than the substrate. Note: the general strength of normal cement-sand plaster is around 10-15 mpa which is the reason for most of the plasters in modern buildings developing cracks.

Trender Innovations Pvt. Ltd

   #2/20, Poes road 1st Street,
Teynampet, Chennai-600018

  sales@trender.in

   

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