Isocrete SBR Latex based bonding agent
Isocrete SBR is a white milky liquid, which has numerous uses as an admixture, primer, bonding agent and sealer.Polymer Emulsions of this type have been used extensively in the building industry as an admixture for cement and concrete applications, including repair and renovation, surfacing of floors and bonding generally. It contains anti-foam to control the density of cementitous mixes.
Characteristics
Areas For Use
Surface Preparation
All surfaces must be clean, dry and free from dust, grease and other contaminents.
Application
FOR FLOORING
This concerns the use of Isocrete SBR in screeds and toppings over background concrete. Adding Isocrete SBR to a floor screed or topping gives the following advantages:
PREPARATION OF SURFACES
Floors should be mechanically prepared, eg scabbled or shot blasted, to give an aggregate exposed surface. Dust should be removed by vacuum, not compressed air. All contaminants such as oil, grease, or any surface laitence must be removed to ensure adequate development of bond when the topping is applied. A water drop test is the simplest method to determine whether water
repellent contamination is present.
PRIMING
Application of a primer coat is necessary to obtain maximum adhesion of the topping or screed.
MIX DESIGN
The mix design depends upon thickness and intended use. However, typically mixes for a 12mm topping or screed are as follows:-
|
Screed |
Topping |
O.P.C |
1 |
1 |
Moist Sand |
3.5 |
1.75 |
3mm Washed Granite |
0 |
1.75 |
SBR Bond |
0.2 |
0.2 (ie 10 litres per 50kg bag of cement) |
Water |
As required |
As required |
All parts are by volume of uncompacted material.
COVERAGE RATE
As a rough guide, 1.2 litres of SBR BOND will cover 1m² of 12mm thickness using the above mixes.
MIXING
Mixing procedures for topping and screeds containing Isocrete SBR are similar to those used to conventional compositions, with gauging water partly replaced by Isocrete SBR. However, mixing time should be minimised to limit air entrainment.
Mixing should be carried out in a forced action mixer. The usual procedures is to pre-mix sand and cement in the mixer, pour in the Isocrete SBR, mix for 1 - 3 mins, then slowly add water to the required consistency.
POT LIFE
The mix has a pot life of approximately 40 minutes and batch size should be calculated accordingly.
APPLICATION
CLEANING OF EQUIPMENT
All tools should be cleaned immediately after use with water because hardened SBR Bond modified toppings and screeds have excellent adhesion and are therefore difficult to remove. Solvents such as white spirit used with coarse wire wool help to remove partially hardened mortar.
Specific Data
Total Solids |
40-45% |
pH |
9.0 – 10 |
Viscosity |
100cps (RVT 1/10rpm) |
Surface Tension |
8 dyne/cm |
Specific Gravity |
1.010 Kg/Ltr |
Appearance |
Milk white |
Na20 Equivalent |
Passes 5 cycles at -10°C – excellent |
Calcium Ions |
Compatible |
Aluminium III Ions |
Compatible |
Antioxidant |
Added |
Bactericide |
Added |
Tensile Strength |
N/mm² at 15% elongation |
Tensile Strength @ Break |
1.5N/mm² |
Elongation @ Break |
300% |
Solubility Of Dry Film In Toluene |
18% |
Shelf Life
12 months from date of manufacture in original unopened containers.
I
Packing . 200Litre drum
Conditions of Use and Disclaimer The information contained in this Material Data Sheet is given in good faith based upon our current knowledge and does not imply warranty, expressed or implied. The information is provided and the product is sold on the basis that the product is used for its intended purpose and is used in a proper workmanlike manner in accordance with the instructions of the Product Data Sheet in suitable and safe working conditions. Under no circumstances will the Company be liable for loss, consequential or otherwise, arising from the use of the product.