Sika® Bonding Primer

Epoxy, waterborne and polyamine curative

24 months from date of production

The product must be stored properly in original, unopened and undamaged sealed packaging in dry conditions at temperatures between 5 °C (41 °F) and 25 °C (77 °F). Higher storage temperatures may reduce shelf life of product. Reference shall also be made to the storage recommendations within the safety data sheet.

From -30 °C to 80 °C (-22 °F to 176 °F) intermittent.

Component A : Component B = 4:1 (by volume)

5 °C (41 °F) min. / 40 °C (104 °F) max.

80 % R.H. max.

Beware of condensation.
The substrate and uncured coating must be ≥ 3 °C (5 °F)  above dew point.

5 °C (41 °F) min. / 60 °C (140 °F) max.

≤ 4 % moisture content Test method: Sika® Tramex Meter

No rising moisture according to ASTM (Polyethylene sheet)

12 hours

Before applying any recommended Sikalastic® RoofPRO resin on Sika® Bonding Primer, allow:

Before applying Sikagard® products on Sika® Bonding Primer allow:

Times are approximate and will be affected by changing ambient conditions particularly temperature and relative humidity.

Ideally, membrane resin will be applied within 24 hours of primer application. This is required for applications in tropical/subtropical environments to avoid UV-related primer deterioration. Maximum primer exposure is seven (7) days. Primer exposed longer than 7 days, and primer exposed to water during curing and exhibiting a chalky appearance, must be reprimed. Deteriorated primer must be mechanically removed before primer reapplication.

• 350 ft²/US gal. on non-absorbent smooth substrates
• 300 ft²/US gal. on prepared, dry concrete.
• 200 ft²/US gal. on absorbent gypsum and cementitious cover boards.

Note: Rough, porous, or absorbent surfaces will require additional primer and will reduce yield.

All substrate surfaces shall be clean, dry and sound. Acceptable substrates include: sound concrete and masonry, wood and plywood, mineralized asphaltic cap sheet, sprayed polyurethane foam, gypsum and cementitious cover boards, and coated glass-faced polyisocyanurate foam boards. Reference separate System Data Sheet for specific surface preparation requirements.

All surfaces to be coated should be thoroughly cleaned by conventional means.
Inspect the substrate.
Spalling, flaking or damaged areas should be repaired using compatible materials to match surroundings or replaced as necessary.
If in doubt apply a test area first.
Tiles have to prepared mechanically, glazing has to be removed.

Grinding may be necessary to level the surface.
For detailed information regarding substrate quality / preparation and primer chart please refer to Sikalastic® RoofPRO Application Manual.

Mix ratio is 4:1 (A:B) by weight and volume. Add Part B into Part A and mix with stir stick or mechanical mixer (Jiffy type) at low speed. Avoid adding air into the primer during mixing. When fully mixed, the primer should be free from streaks and of a uniform light green colour.

Do not break down kits into smaller quantities.

Apply by brush or phenolic resin core roller at the recommended rate. Correct amount of primer will saturate the substrate and leave a slight film on the substrate top surface. Apply evenly without puddling.

Clean all tools and application equipment with water immediately after use. Hardened and/or cured material can only be removed mechanically.