LANKO® 451 Roof Seal
ACRYLIC FLEXIBLE WATERPROOFING LIQUID APPLY MEMBRANE
LANKO® 451 Roof Seal is a ready-to-use acrylic waterproofing liquid apply membrane.
- Elongation more than 380 %
- UV resistant
- Bridges cracks 0.75 mm
- Solvent free
- Easy to use
- Color available : Grey, white, green, red and blue
Usage
- Interior/Exterior
- Area of uses: wall, balcony, rooftop and roof
- Rigid and flexible substrates : concrete, render, cement sheet.
Advantages
- Elongation more than 380 %
- UV resistant
- Bridges cracks 0.75 mm
- Solvent free
- Easy to use
- Color available : Grey, white, green, red and blue
Packaging
5 kg pail, 20 kg pail
Colour
Grey, white, green, red, and blue
Product Details
Shelf life
12 months from date of production stored properly in undamaged, original, sealed packaging.
Storage conditions
Store in dry condition, protected from direct sunshine.
Density
~ 1.3 kg/L
Solid content by weight
~ 56%
Solid content by volume
~ 43%
System structure
Roof Coating*
LANKO 451 ROOF SEAL (SOVACRYL) is applied in 2 or 3 coats
| Total consumption | ≥ 1.4 - 2.1 kg/m2 |
| Dry Film Thickness (DFT) | ≥ 0.4 - 0.7 mm |
*For partial reinforcement, LANKO GLASS FIBER MESH is applied at areas with high movement, irregular substrate or to bridge cracks, joints and seams on the substrate as well as for details.
*For primer, please refer to substrate.
Roof Reinforcement
LANKO 451 ROOF SEAL (SOVACRYL) is applied in a base coat layer, reinforced with LANKO GLASS FIBER MESH and sealed with 1 - 2 top coats of LANKO 451 ROOF SEAL (SOVACRYL).
| Total Consumption | ≥ 2.1 - 2.8 kg/m2 |
| Dry Film Thickness (DFT) | ≥ 0.8 - 1.0 mm |
| Layer | Product | Consumption |
| 1. Primer | please refer to substrate pre-treatment | please refer to substrate pre-treatment |
| 2. Base coat | LANKO 451 ROOF SEAL (SOVACRYL) | ≥ 0.7 - 1.0 kg/m2 per coat |
| 3. Reinforcement | LANKO GLASS FIBER MESH | |
| 4. Base coat | LANKO 451 ROOF SEAL (SOVACRYL) | ≥ 0.3 - 0.5 kg/m2 per coat |
| 5. Top coats | LANKO 451 ROOF SEAL (SOVACRYL) applied in 1-2 coats | ≥ 0.6 - 0.7 kg/m2 per coat |
Note:
1. Do not apply more than of 0.75 kg/m2 of LANKO 451 ROOF SEAL (SOVACRYL) per coat for layer without reinforcement.
2. These figures are theoretical and do not include for any additional material required due to surface porosity, surface profile, variations in level and wastage.
Tensile strength
> 1 MPa at 7 days (ASTM D412)
Tensile adhesion strength
> 0.5 N/mm2 at 7 days (adhesion to concrete, EN 1542)
Application
Product temperature
+5°C min. / +60°C max.
Ambient air temperature
+5°C to +35°C
Relative air humidity
5% min./ 80 % r.h. max.
Substrate temperature
+5°C min. / +60°C max.
≥3 °C above dew point
Substrate moisture content
≤ 6 % pbw
No rising moisture according to ASTM (Polyethylene-sheet).
Substrate pre-treatment
| Substrate | Primer | Consumption (kg/m2) |
| Cementitious substrate and render | LANKO 451 ROOF SEAL (SOVACRYL) diluted with 10 % water | ~0.3 - 0.5 |
| Cement sheet | LANKO 451 ROOF SEAL (SOVACRYL) diluted with 10 % water | ~0.3 |
Note: These figures are theoretical and do not include for any additional material required due to surface porosity, surface profile, variations in
level and wastage. For the Waiting Time / Overcoating, please refer to the PDS of the appropriate cleaner and primer. Other substrates must be tested for their compatibility. If in doubt, apply a test area first.
Waiting time to overcoating
| Waiting time with Reinforcement | Waiting time without | Ambient condition |
| 24 hours | 6 hours | +20 °C / 50 % r.h. |
| 12 hours | 4 hours | +30 °C / 50 % r.h. |
Note: Times are approximate and will be affected by changing ambient conditions, particularly temperature and relative humidity.
EQUIPMENT
Select the most appropriate equipment require for the
project.
▪ Brush : Soft bristle brush
▪ Roller : "non-fuzzy" roller
▪ Airless spray
SUBSTRATE PREPARATION
- Surface must be clean and without any trace of oil.
- Repair damaged concrete with LANKO 731 STRUCTURE REPAIR
- Repair cracking that still spreading or experience movement with LANKO 603 POLYURETHANE.
- The joint between wall and floor should be filled or protect by making a cornice.
- Ensure that the substrate (tile, metal, cement sheet) is installed according to manufacturer standard before applying LANKO® 451 Roof Seal
- Wall and Floor
- New rendered surface must be at least 7 days.
- New concrete surface must be at least 7 days.
- Existing concrete surface must be clean without mould or algae. Then wait for the surface to dry at least 24 hours.
MIXING
Stir the product for 1 minute in bucket before applying. LANKO® 451 Roof Seal can be applied directly from the bucket with brush or roller.
APPLICATION
Prior the application of LANKO® 451 Roof Seal, the priming coat must be cured (tack-free).
For the Waiting Time / Overcoating, please refer to the PDS of the appropriate primer. Damageable areas (door frame) have to be protected with an adhesive tape.
Roof Coating : Apply the primer follow the substrate pre-treatment table.
- Apply first coat of around 0.7 kg/m2 of LANKO 451 ROOF SEAL (SOVACRYL).
- Leave it dry follow the waiting time / overcoating table.
- Apply the top coat with one or more additional coat of LANKO 451 ROOF SEAL (SOVACRYL) around 0.7 kg/m2 per coat and leave it dry.
Roof Reinforcement : LANKO® 451 Roof Seal is applied in combination with LANKO GLASS FIBER MESH. Apply the primer follow the substrate pretreatment table.
- Apply first base coat around 0.7-1.0 kg/m2 of LANKO 451 ROOF SEAL (SOVACRYL).
- Roll in the LANKO GLASS FIBER MESH and ensure that there are no bubbles or creases. Overlapping of the reinforcement minimum 5 cm.
- Apply additional base coat of LANKO 451 ROOF SEAL (SOVACRYL) around 0.3-0.5 kg/m2 per coat right into the wet fiber mesh to achieve the required film thickness. The entire application shall happen while LANKO 451 ROOF SEAL (SOVACRYL) is still liquid, wet in wet.
- Repeat step 1-3 until the roof area is waterproofed.
- After two coats are dry, apply the top coat with one or more additional coat of LANKO 451 ROOF SEAL (SOVACRYL) around 0.6-0.7 kg/m2 per coat.
Please note, always begin with details prior starting with waterproofing the horizontal surface.
CLEANING OF EQUIPMENT
Clean all tools and application equipment with water immediately after use. Hardened / cured material can only be removed mechanically.