Bostik AP 250 Flexibond Primer and Sealer extended information
Coverage:
As a diluted primer 2.5 litres will cover approx. 75m2
Approx. 2.5 litres of diluted Bostik AP 250 Flexibond per 20kg of adhesive
Approx. 0.5 litres of diluted Bostik AP 250 Flexibond per 5kg of grout
USES
Bostik AP 250 Flexibond is an acrylic dispersion polymer for use as a flexible admixture with cement based tile adhesives and/or grouts. It can further be used as a primer/sealer for ready mixed tile adhesives and floor underlayment screeds.
It improves flexibility, shear modulus and tensile strength giving greater resistance to minor movements and vibration. Cement pores are part filled with the polymer, reducing the permeability and therefore reducing any damage by liquid transfer. Adhesion is enhanced when fixing to non-porous substrates and tiles. Improves the deformability of C2 adhesives to meet the requirements of class S1 according to EN12022.
The addition of Bostik AP 250 Flexibond to a non-polymer modified adhesive or grout is required where surfaces are prone to very minor movement and vibration, or where direct fixing to glazed tiles or other impervious surfaces is required.
Bostik AP 240 Flexibond MIX RATIO
- Mix 1 part Bostik AP 250 Flexibond to 2 parts water by volume.
- Add the selected Bostik cementitious tile adhesive to the diluted Bostik Flexibond, mixing well to obtain a slump free, workable consistency.
PREPARATION
Priming / Sealing:
3. Do not apply neat, as skinning may occur which may cause delamination. Apply to substrate using a brush. If the surface is still absorbent, apply a second coat. Dries in approximately 1 hour.
Tiling:
4. Ensure that all surfaces are clean, dry, sound and free from dust, grease or any contaminating barrier. Make good any unsound areas and remove flaky or peeling layers before tiling.
Grouting:
5. Ensure that tiles are firmly fixed and adhesive is completely set. Bostik standard set adhesives should normally be left for at least 24 hours before grouting. Bostik rapid setting adhesives should be left for at least 3 to 4 hours, however these times will be increased with sealed or impervious substrates or at low ambient temperatures, or high humidity. Ensure tiles and joints are clean, dry, sound and free from dust, grease or any contamination.
APPLICATION
- Apply the Bostik adhesive and grouts modified with Bostik AP 250 Flexibond in the same way as when they are mixed only with water.
- Surplus material should be cleaned from surfaces before it dries using a damp cloth.
- The addition of Bostik AP 250 Flexibond may slightly alter the working and setting times of the Bostik cement based tile adhesives.
- To ensure uniform grout colour the same mix proportions must be used throughout an installation.
CLEANING
10. Follow the adhesive or grout product’s cleaning recommendations.
11. Clean tools and equipment immediately after use with water.
Bostik AP 250 Flexibond product characteristics
Colour | White |
Form | Liquid |
Specific Gravity | 1.0 approx. |
Composition | Acrylic dispersion polymer |
Product Code | 30811643 2.5 Litre x 6 |
Storage/Shelf Life | Store for up to 18 months from date of manufacture when stored in original, unopened packaging under cool, dry conditions within the temperature range of +5°C to +25°C and out of direct sunlight. Protect from frost. |
Bostik AP 250 Flexibond typical performance data
Application Temperature | +5°C to +25°C |
Service Temperature | Up to 40°C |
Mix Ratio | 1 part AP 250 Flexibond to 2 parts water by volume when using as a flexible additive and as a primer |
Coverage | As a diluted primer 2.5 litres will cover approx. 75m2 Approx. 2.5 litres of diluted AP 250 Flexibond per 20kg of adhesive Approx. 0.5 litres of diluted AP 250 Flexibond per 5kg of grout |
PRECAUTIONS IN USE
For any application not covered please contact Technical Services on +44 (0)1785 272625 or visit www.bostik.co.uk for advice.
Recommendations and suggestions are for guidance only, since conditions of use are completely beyond our control.
There are no reviews yet.