Tanking Slurry

SURFACE PREPARATION
The substrate must be clean and sound. This will involve the removal of existing plaster and render coats, whitewash, paint, dirt, oil etc. This is best achieved by grit blasting or hacking depending on how clean the substrate is. Once clean and sound, the floors should be jet washed to clean away any further dirt or dust.

The walls should be checked for nails or any other metal fixings which must be removed.
Make good any holes, cracks or poor mortar joints using Antel Waterstop or mortar with Antel Rendermix additive.
Chasing out for electrical or plumbing lines should be completed prior to treatment.
If the property is to be fully tanked, consideration should be given to the removal of windows, doors, surrounds, radiator brackets and any other fixings which may prevent a continuous seal. Any pipe intrusions should be chased out to 25mm around and 25mm deep and made good.
Where water pressure is encountered it can be relieved by inserting weep tubes in the wall. This will allow the Tanking applications to be carried out and can be subsequently sealed using a quick setting plug.
Where severe water seepage is experienced or where the angle is found to be suspect, chase out to a minimum of 25 mm from the wall and 25mm into the floor, cutting into the wall where possible.

MIXING/APPLICATION

Add 7-9 litres of solution (water or water/SBR combination) to one 25kgs bag. If using Antel SBR we recommend using a mix of 3 parts water to 1 part SBR. The addition of SBR will enhance the waterproofing properties, flexibility and adhesion and is highly recommended. Thoroughly mix for at least three minutes. The mix will remain workable for 1-2 hours depending on conditions on site.

Prior to the application of the first coat, the walls should be mist sprayed. Any surface water should be allowed to dry off. Apply fillets to floor/wall angles, vertical corners and around wall/ceiling joints of vaults if relevant. These fillets should be formed using Antel Waterstop.

1st Coat - Apply by brush one coat of Tanking Slurry to the surfaces to be treated. Allow a minimum of four hours before the next coat. Where severe damp is encountered it will be advisable to leave overnight to highlight any weak spots. These can be sealed using Antel Waterstop prior to the application of the second coat.

2nd Coat - Apply the second coat the same as the first. Allow to dry for a minimum of twenty-four hours. It will be beneficial to finish the first coat with vertical strokes and the second coat horizontally.

After the application of the second coat, you may want to apply a sand/cement render or a thermal renovating plaster. As an alternative, the tanking slurry can be left as the finish coat. If the Slurry is to be left as the finish coat it should not be decorated until complete cure and drying has occurred. Decoration should be confined to a non plastic emulsion paint. If conditions are damp with poor ventilation, full cure could take several months.

GENERAL NOTES

FLOORS
When a waterproofing contract is carried out consideration should be given to treating solid floors, particularly if there is no existing floor membrane or if its effectiveness is suspect.
By waterproofing the walls you may push the water elsewhere and it could reappear through a defective floor. If the floor is to be treated, any existing screed should be removed to allow the Tanking Slurry to be carried across the floor to form a continuous waterproof seal. This can be re-screeded or if there is sufficient headroom, Antel Self Levelling Floor Compound can be used. In all cases the slurry must be protected from wear.

CONDENSATION
Basement areas are prone to condensation and internal waterproofing of such areas could further highlight this problem. The application of Antel Rendermix in the cement mix or renovating plaster will reduce the problem but consideration should be given to correct ventilation and heating that may be necessary. Alternatively condensation can be controlled by the use of dehumidifiers.

Fixings
Any Fixings required that will entail entry through the Tanking must be carried out as follows:
A. Drill a hole into and through the Tanking. The hole must be a minimum of twice the diameter and 13mm deeper than the proposed fixing plug.
B. Fill the hole with Antel Waterstop ensuring that no air pockets exist and that the hole is completely filled. Press the plug in and allow to cure.
C. Alternatively after filling the hole, allow to cure, and drill in the centre of the cured Waterstop, the correct size and depth for the fixing plug, and push in the plug.
D. Any timber skirtings to be fitted can be fixed using a suitable adhesive.

Health & Safety: Tanking Slurry is non-combustible. Wear respiratory protection, gloves, and eye/face masks when mixing or handling. Do not inhale dust. Mix in a well-ventilated area. Refer to the full Health & Safety Data Sheet.

Floors: If waterproofing walls, consider treating solid floors to prevent water from resurfacing. If needed, remove existing screeds and extend the slurry across the floor for a continuous waterproof seal. Protect the slurry from wear by re-screeding or applying Antel Self-Levelling Floor Compound.

Condensation: Waterproofing basement areas can increase condensation. Adding Antel Rendermix to the cement mix or using a renovating plaster can help. Proper ventilation, heating, or dehumidifiers may also be necessary.

Fixings: Any fixings that penetrate the tanking must be carefully sealed using Antel Waterstop to maintain waterproof integrity. Drill a hole twice the diameter and deeper than the fixing plug, fill it with Antel Waterstop, and allow it to cure before inserting the fixing. Alternatively, after curing, drill the correct size hole for the plug and insert it securely.

24-48 Hour Dispatch

We pride ourselves on fast and reliable delivery. Most orders are dispatched promptly and typically arrive within 24-48 hours, subject to stock availability and courier schedules.

If there are ever any unexpected delays, our team will keep you informed as soon as possible.

For larger or ongoing projects where additional quantities may be required later, we recommend contacting us in advance so our team can help check current stock availability and product continuity for your project.