Acrylbit
Waterproofingcompound
Discussion
ACRYLBIT waterproofing compound is a highly flexible liquid applied, bitumen emulsion and acrylic blend, that when reinforced with stitch bonded polyester, forms a homogeneous seamless waterproofing system. ACRYLBIT in conjunction with stitch bonded polyester is suitable for; flashings, parapet walls, properly graded roof decks, lap joints, roofing screws and many other waterproofing details. ACRYLBIT is not suitable for areas of long term ponding or under tiles. ACRYLBIT is available in 25L containers and in a range of four different colours.
Physical Properties
| Colour: | Red, Grey, Black and Brown. |
| Application: | Brush, roller or spray. |
| Coverage: | 2.2L/m2 – 2.5L/m2 (depending on surface porosity) |
| Total Solids: | +/- 55% |
| Specific Gravity: | +/- 1.2 |
| Viscosity: | 110 Krebbs Units at 25ºC |
| Drying Time: | (Between Coats) Minimum 30 minutes at 25ºC at 65% R.H. (Last Coat) 2-3 hours before resistant to rain. Full cure 12-20 hours at 25ºC at 65% R.H. |
| Cleaning: | Water when wet. Ethyl acetate when dry. |
| Flammability: | Non Flamable |
Surface preparation
All forms of surface contamination must be removed to ensure a smooth surface, free of moisture and any loose material, or any other barrier to adhesion. Steel and galvanised steel surfaces must be free of loose paint, grease, grime, oil and rust.
Technical assistance and applicator training are freely available to all approved users.
Application
PRIMING:
All non metal surface – use a 50% ACRYLBIT and clean water mix to prime the entire surface, allow a 30 minute drying time.
On metal surfaces – Prime with Darachem DC4 and allow 4 hour drying time.
Apply at the rate of 1L/m2 undiluted ACRYLBIT and immediately embed the SBP Geo-Fabric into the wet product ensuring no creases or folds in the material. Work the membrane into the ACRYLBIT using a brush. Product should be evident “striking through” the membrane and if this is not the case, too little product has been applied or the product has been allowed to dry before embedding the membrane. At this point the bedding coat for the second run of membrane can be applied.
Apply the second run of membrane into the bedding coat in the same manner ensuring an additional coat at 1L/m2 between the 2 layers of membrane at the 100 mm overlap.
After allowing a minimum drying period of 30 minutes.
Apply a second coat ACRYLBIT at the rate of .75L/m2. Allow a minimum of 30 minutes drying period.
Apply a further final coat of ACRYLBIT at the rate of .75L/m2. It will be noted that a total of 2.5L/m2 of ACRYLBIT has now been applied. The minimum weight of the membrane alone shall be 100g/m2. The total weight per m2 shall therefore be 1.5 kg
Note drying times are based on a temperature of 250 c min. and a R.H. of 60% max.
Technical assistance and applicator training are freely available to all approved users.
Maintenance
A maintenance re-coat is recommended after three years.
 Acrylbit |