Sika® FerroGard®-860 CP

Sika® FerroGard®-860 CP has been tested by The Swedish National Testing and Research Institute:

Freeze/thaw resistance: SP, Sveriges Provnings-och Forkningsinsitut, No.95B4,1845.

Adhesion and compressive strength: SP Sveriges Provnings-och Forkningsinsitut, No. 94B4.5018A 

If stored in accordance with manufacturer's instructions in unopened containers Part A and Part B are both 12 months. 

Sika® FerroGard®-860 CP should be stored under cover and clear of the ground. Storage conditions should be dry. Do not stack more than 6 sacks or 2 pails high. Protect from moisture and frost; preferably store at above 15°C but in any case not below 5°C. 

2200 kg/m³

92 N/mm² (28 days)

15 N/mm² (28 days)

7 N/mm² (28 days)

The recommended applied thickness of Sika® FerroGard®-860 CP is 8 mm. 

Coverage is dependent upon various factors, including the method of working and substrate condition. 

When one 25 kg sack of Part A is mixed with 5 litres of Part B liquid polymer, approximately 13.8 litres of Sika® FerroGard®-860 CP will be produced. Approximately 73 sacks of Part A and 18 pails of Part B are required to produce approximately 1m³ of mixed material. 

Preparation of the concrete substrate is vital to achieve optimum performance and long service life from the cathodic protection installation. Remove all surface coatings, defective renders, foreign matter, formwork treatments, laitance, algae and other contaminants that may adversely affect the bond. Use abrasive blasting or high pressure water jetting.

Do not use vibrating or high impact methods; such methods increase the risk of inducing micro cracks that may affect the adhesion and long-term durability of the anode system.

The prepared substrate should have a pull-off strength of at least 1,5 N/mm².

Spalled or delaminated areas and cracks should be repaired with approved SikaEmaco concrete repair products. Hairline cracks may be left untreated. Under no circumstances should any cracks be injected with materials, which will insulate areas from the CP system. Areas of low cover and exposed steel must be treated or the cover built up to that required.

Primary Anode *

A primary anode is an essential requirement for a Sika® FerroGard®-860 CP-system. The required number and configuration for correct current distribution will be project specific and is, therefore, a CP design decision. As a guide for a plane surface, primary anodes should be placed at 2 m centres (maximum) with a 1m clearance from the edges of the anode zone. The primary anode should be fixed to the prepared substrate by plastic anchors. The configuration should allow the connection to the rectifier to be made outside the anodic zone and in duplicate as a minimum. Suitable primary anode materials include surface activated titanium mesh ribbon.

* Contact your Sika office for advice.

It is essential that the temperature of both components of Sika® FerroGard®-860 CP is at least 15°C before mixing. Use approximately 4,7 litres (4,1 litres minimum - 5,3 litres maximum) of Sika Ferrogard 860 CP Part B for each 25kg sack of Sika® FerroGard®-860 CP Part A.

Using a power mixer (no tumbling motion), add the powder to the liquid. Mix until the powder is wet throughout and maximum dispersion of all ingredients has been obtained. Allow the mix to stand for 5 to 10 minutes.

Re-mix adding a little additional liquid when required, without exceeding the maximum 5,3 litres. Do not overmix.  

The temperature should be above 5°C during application and for at least 24 hours thereafter. Apply Sika® FerroGard®-860 CP when no rainfall is expected or take the necessary protective measures using, for example, plastic sheets.

Under extremely hot or windy conditions it is advised that hot substrates are cooled with potable drinking water and that the application should take place between sunset and sunrise. Use sunlight-reflecting pump lines; provide wind protection and clean equipment frequently.

Sika® FerroGard®-860 CP should be applied to surfaces that have been well dampened but which are free from standing water.

Sika® FerroGard®-860 CP has been designed for spray application only, using wet-spray concrete techniques. Suitable spray equipment, essential for successful application, includes hand-held hopper guns and worm-driven equipment. Contact your local Sika office for advice.

Application is carried out in two stages. Spray the first coat to a thickness of 1 to 2 mm. Immediately after spraying, and while still wet, broom the material into the concrete surface. Spray the second coat immediately onto the first (still wet) coat to the recommended thickness of 8 mm, using pre-placed battens to achieve the 8 mm thickness. Apply to a limited area only to prevent premature drying of the first coat. If, for whatever reason, the first coat has set, apply a new broom coat before building up to the 8 mm thickness. 

Sika® FerroGard®-860 CP is self-curing. Under poor conditions, for example where rapid drying may occur (hot and/or windy conditions), protect by covering the Sika® FerroGard®-860 CP with plastic sheets or by broadcasting dry silica sand onto horizontal surfaces after the surface film has formed.

When mixed the product has a pot life of approximately 30 minutes at 21°C.

After the final spray application, the following curing times should be used as a guide before Sika® FerroGard®-860 CP is subjected to foot traffic: