METHOD STATEMENT
SIKATOP SEAL – 107
USES: WATERPROOFING FOR RESTROOM USING SIKATOP SEAL – 107
UNDERNEATH TILING WORK
1. SCOPE
This method statement describes the step by step application of waterproofing
mortar for restroom using sikatop seal – 107
2. PRODUCTS DESCRIPTION
Sikatop Seal – 107 is cementitious based, 2 – components polymer modified
waterproofing slurry coating apply to concrete and mortar to prevent water
infiltration.
Uses
Sikatop seal – 107 can be used for external and internal water – proofing, repair
work and protection from and de – icing agents.
Areas of application include potable water tank, basements, terraces and balconies,
bridges, retaining walls, sealing hairline cracks, not subjected to movement.
Characteristics/ Advantages
Good adhesion even on mat – damp surfaces.
Easy mixing and application
Good adhesion to sound surfaces
Effective barrier against carbonation process
Non-toxic
Non corrosive
Slightly flexible
Can be spray applied
3. SYSTEM BUILD UP
4. APPLICATION
4.1 Substrate Preparation
Concrete, mortar and masonry surfaces must be clean, free from
grease, oil and loosely adhering particles.
Prepare and clean concrete surfaces by suitable mechanical means
such as abrasive blast cleaning or equivalent to ensure cement
laitance, surface contamination (e.g. curing compound) and all existing
coatings are removed.
The resultant surface finish shall be profiled for maximum bond.
4.2 Repair/ Levelling/ Rendering Mortar (if required)
a. Repairing Works
Using appropriate Sika repair product range (Sikadur, SikaGrout, etc.) to
repair concrete substrate defects such as cracks, voids, honeycombs (if any).
Refer to relevant PDS for more information.
4.3 Application of waterproofing layer Sikatop Seal – 107
a. Mixing
Mixing in a clean container by slowly adding the powder component to the
liquid component and stirring with slow speed electric mixer (500 r.p.m.)
DO NOT add any water!
b. Application
Surfaces have to be thoroughly saturated with water prior application of first
coat of SikaTop Seal – 107, but no standing water.
Whilst the substrate is still damp from saturation, apply the first coat at
consumption of approx. 2.0 kg/m2.
Leave to harden for approximately 4-8 hours at the temperatures above 20oC
before applying the second coat at consumption of approx. 2.0 kg/m2 in
crosswise direction to the first application. For slurry consistency, apply with
hard plastic bristled brush or broom.
For floor application, to avoid risk of damage to the first coat, it is
recommended that the second coat be applied after 24 hours. If the second
coat is applied 12 hours or later, the slightly pre wetted, preferable using fine
spraying.
Notes: please conduct the trial area first before actual application on big
area.
c. Curing
It is essential to cure Sikatop Seal – 107 immediately after application for a
minimum of 3 to 5 days to ensure full cement hydration and to minimize
cracking. Use polythene sheeting or similar approved methods.
Further treatment (e.g. tilling works) shall be carried out after a waiting period
of at least 7 days at 20oC
d. Tiling Works
Tiling works shall be proceed using tile adhesive.
Grouting work shall be proceed using tile grout that is suitable
Tiling works shall be carried out according to the latest state of the art
e. Detailing
Generally, failures in waterproofing system occur at details such pipe
penetration, anchor, gully etc.so a particular attention shall be given and
guideline provided in the enclosed drawings shall be followed.
Note: Please refer to relevant PDS for more information.
