Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- CASE Ingredients Functions
- Technologies
- Product Families
Features & Benefits
- Labeling Claims
- CASE Ingredients Features
Applications & Uses
- Applications
- Coating Type
- Application
SILIKAL® RU 727 resin is used as a primer on concrete, cement and asphalt substrates and as an intermediate primer on existing coatings. SILIKAL® RU 727 resin can be used on metal and ceramic substrates if SILIKAL® Additive M adhesion promotor is used. As a primer on mineral substrates with subsequent color sealing, SILIKAL® RU 727 must also be in pigmented form. In the case of color sealing on asphalt, pigmented SILIKAL® RU 727 resin is applied directly, but a careful inspection of the substrate is absolutely essential. If the inherent strength is suffi cient, it is only possible to seal or coat asphalt substrates in interior rooms that are as tightly temperature-controlled as possible.
- Advice on Application
Once the substrate has been inspected, it normally needs to be pre-treated. The necessary quantity of hardener must be adjusted in light of the temperature of the surface. For exact details, please refer to the table “Hardener dosages”. You must not dose less than the given quantity of hardening powder, as this will jeopardize the curing process. You must also avoid overdosing the hardening powder, as this can likewise lead to serious curing problems. SILIKAL® RU 727 resin must be applied evenly without leaving puddles by means of a paint roller. Matt and heavily absorbent patches must be reprimed wet in wet before hardening until the pores are closed up. Further coats should be applied within 24 hours of hardening. To produce SILIKAL® RU 727 resin in pigmented form, fi rst disperse approx. 10 % pbw. of SILIKAL® Pigment Powder into the SILIKAL® RU 727 resin (5.3 kg of resin) using a dissolver unit, making sure there are no lumps, and then admix in the other components (SILIKAL® Additive I, SILIKAL® Hardening Powder, if necessary SILIKAL® Additive M). SILIKAL® RU 727 resin must be completely cured before any further coat is applied.
- Special Advice
SILIKAL® RU 727 resin reaches its fi nal physical properties in terms of compressive strength, fi nal adhesion etc. after a post-reaction period which may last several days.
- Suggested Coating System
- Priming
- Alternative priming for ceramic tiles
- Thin coating
- Thin coating (intermediate coat)
- Pigmented top coat
- Mixing Ratio
Component Quantity in kg Quantity in liters SILIKAL® RU 727 resin 5.3 5.3 SILIKAL® Additive I 1 1 - Hardener Dosages
Temperature Hardening Powder (% pbw.*) Pot life (approx. min.) Hardening time (approx. min.) 0°C 5 20 60 10°C 4 15 40 20°C 3 15 40 30°C 2 10 20 * The quantity of hardening powder is always related to the quantity of resin including SILIKAL® Additive I.
Properties
- Resin Properties
| Value | Units | Test Method / Conditions | |
| Viscosity (20°C) | 170 - 220 | mPa.s | DIN 53 015 |
| Flow Time (20°C, 4 mm Cup) | 38 - 42 | sec. | DIN 53 211 |
| Density (D₄²⁰) | 0.99 | g/cm³ | DIN 51 757 |
| Flash Point | 10.0 | °C | DIN 51 755 |
| Pot Life (20°C, 100 g, 3 % pbw. Hardening Powder) | approx. 15 min. | — | — |
| Application Temperature | 0 - 35 | °C | — |
| Density (Hardened state) | 1.16 | g/cm³ | DIN 53 479 |
| Ultimate Elongation (Hardened state) | 28.0 | % | DIN 53 455 |
| Hardness (Hardened state) | 65 - 75 | Shore-D | DIN 53 505 |
| Water Absorption (4 Days, Hardened State, 50·50·4 mm) | 125.0 | mg | DIN 53 495 |
| Water Vapour Permeability (Hardened state) | 1.05*10⁻¹¹ | g/cm·h·Pa | DIN 53 122 |