• Easy to use, 2:1 p.b.v. ratio.
• Moisture tolerant up to 6% p.b.w.
• Excellent penetration and adhesion.

Sika MT Primer is a two-component, high-solids, red-tinted epoxy primer developed for use as a moisture-tolerant and adhesion-promoting primer. It is applied on both dry and damp concrete substrates and is typically used beneath Sikalastic® and selected Sika® waterproofing membranes. It is also used to prevent outgassing before applying Sikagard® coatings and as an optional adhesion promoter in waterproofing systems.

• Primer: Sika® MT Primer
• Compatible Top Coats: Sikalastic® membranes, Sikagard® epoxy and polyurethane coatings
• Recommended intermediate system layer when concrete moisture exceeds 6%: Sikafloor®-81 EpoCem®CA (horizontal surfaces) and Sikagard®-75 EpoCem®CA (walls/overhead)

• Suitable for priming damp concrete substrates (≤ 6% moisture content)
• Used on substrates to reduce outgassing before epoxy or polyurethane coatings
• Enhances adhesion for waterproofing systems on both decks and walls

• Application thickness:
• One coat (8–10 mils wet film) for substrates <5% moisture
• Two coats (total 16–20 mils) for substrates between 5–6% moisture
• Coverage: 4–5 m²/L (160–200 ft²/US gal) at 8–10 mils wet thickness
• Application temperature: 10°C to 30°C (50°F to 86°F)
• Relative humidity during application must be ≤ 85%
• Substrate temperature must be 3°C (5.5°F) above dew point
• Pot life varies by temperature:
• 50 minutes at 10°C
• 25 minutes at 20°C
• 15 minutes at 30°C
• Recoat time (before applying a second primer layer or coatings):
• At 10°C: 24 hrs min / 3 days max
• At 20°C: 12 hrs min / 2 days max
• At 30°C: 8 hrs min / 1 day max
• Curing times:
• Foot traffic: 6–24 hrs
• Light traffic: 2–6 days
• Full cure: 5–10 days, depending on temperature

• Concrete must be mechanically prepared to ICRI CSP 3–4 for decks or CSP 1–3 for walls
• Concrete strength: ≥ 25 MPa compressive, ≥ 1.5 MPa tensile
• Do not apply if ambient or substrate temperatures are rising or if vapor drive is suspected
• Do not thin or hand mix the material
• Store between 4°C and 32°C (40°F and 90°F); pre-condition to 18–24°C (65–75°F) before use
• Clean tools with Sika® Epoxy Cleaner before material hardens
• Not suitable for exterior slabs on grade in freeze/thaw conditions
• Freshly applied material must be protected from damp, condensation, and water for at least 72 hours

https://can.sika.com/en/construction/deck-membrane/vehicular/primer/sika-mt-primer.html