Sika Sikafloor 155 WN

Sika Sikafloor 155 WN is a solvent-free, water dispersed floor primer based on epoxy resin.

Best Uses

Sika Sikafloor 155 WN may only be used by experienced professionals. Sika Sikafloor 155 WN is suitable as a primer and adhesion promoter on properly prepared new concrete, cementitious screeds, hardened concrete, existing epoxy floor coatings, EpoCem levelling layers.

Sika Sikafloor 155 WN is also formulated as a primer for Sikafloor 81 EpoCem, Sikafloor 20 PurCem and Sikafloor 21 PurCem if required.

• Easy and fast to apply
• Especially suitable for highly absorbent substrates
• Water dispersed and odourless
• Can be applied in unventilated areas
• Very good bond strength over its whole application temperature range
• Environmentally friendly

Application

SUBSTRATE QUALITY / PRE-TREATMENT
The concrete substrate must be sound and of sufficient compressive strength (minimum 25 N/mm2) with a minimum pull off strength of 1.5 N/mm2. The substrate can be damp but must be free of standing water and free of all contaminants such as oil, grease, coatings and surface treatments etc. If in doubt, apply a test area first.

Concrete substrates must be prepared mechanically using abrasive blast cleaning or scarifying equipment to remove cement laitance and achieve an open textured surface. Weak concrete must be removed and surface defects such as blow holes and voids must be fully exposed. Repairs to the substrate, filling of blowholes / voids and surface levelling must be carried out using appropriate products from the Sikafloor®, SikaDur® and Sikagard® range of materials.

All dust, loose and friable material must be completely removed from all surfaces before application of the product, preferably by brush or vacuum.

MIXING
Prior to mixing, thoroughly stir part A (resin) well, then add all of part B (hardener) and mix both liquid parts thoroughly for one minute until a uniform mix has been achieved. When parts A and B have been mixed for one minute for the first coat, slowly add 10% of clean water while mixing continues for a further two minutes, until a fully homogenous mix has been achieved. For the second coat, do not add additional water, but continue the mixing for a total of 3 minutes until a fully homogenous mix has been achieved. To ensure thorough mixing of both coats, after the minimum 3 minutes mixing, pour the mixed material into another container carefully scraping the sides and mixing paddle with a spatula and then mix again briefly to ensure complete and thorough mixing. Excessive mixing must also be avoided to minimise air entrainment.

Mixing Tools -  Low speed electric stirrer(~ 300 - 400 rpm)
Apply Sikafloor®-155 WN by suitable brush, roller or trowel and overwork with a roller.