Product Advantages
Bona R850T, is a high viscosity adhesive, based on Bona R850, made for gun application.
Rapid setting, the hardened adhesive has a firm texture and can be used on nearly all sub floors.
Technical Spec
Open time: Approx 40mins*
Drying time, until: - Application of load: 24-48hrs*
* at 20 °C and 55 % rh
Preparation
The substrate must in general be even, totally dry, clean, free from cracks and physically sound. The surface should also be slightly textured. If applicable, it must meet the requirements of local standards or codes of practice.
If necessary, it shouldbe professionally prepared for laying. A primer is typically not needed. If the sub floor is problematic the use of a primer like Bona D501, R540 or R590 can improve it. Uneven floors should be levelled with Bona H600, H610 (filling of holes), or H660. Note: Bona Quantum is suitable in association with under floor heating. Such floors need to pass the heating up protocol to drying up the screed! During installation and three days after the screed temperature must not pass 25 °C. **moisture reading of the subfloor must be carried out in correlation with local standards and codes of practice
(e.g. ASTM F 2170 Test Method, BS 8201:2011, TKB KRL method, CM-measurement, etc.)
Application
Before using the adhesive the following climatic conditions must be met:
Air temperature: min. 18°C
Floor temperature: min. 15°C (with underfloor heating max. 20 °C)
R.H: max. 70 %
The adhesive itself must, if necessary, be brought to the right temperature.
Apply with a barrel gun or notched trowel
Coverage
If used with a trowel 1 sausage will cover approximately 1m2
If used as a baton system with 200mm centres between batons 1 sausage will cover approximately 1.5m2
Cleaning
Cleaning: Acetone or ethanol will remove but hardened adhesive can only be removed mechanically.
Storage / Shelf life
Shelf life: 1 year from date of production in unopened original container
The temperature must not fall below +5°C or exceed +25°C during storage. Store in cool, dry, well ventilated area.